Re: [talk-ph] better ways to coordinate coastline mapping?
I agree, but can we keep the sawtooth webmap running for a few more weeks/months? Another thing, I am thinking is a script to report whether an island node is enclosed by a coastline way. A point-in-polygon in GIS-speak. This should help us identify and map the smaller islands. Coders and other ideas welcome. On 9/2/10, Eugene Alvin Villar sea...@gmail.com wrote: Hmmm... I guess we can declare this coastline correction task complete? There are still red spots in the webmap but I think these are all residual errors and I'm guessing there are no more SRTM-based coastlines remaining. I think all are now based on Landsat or PGS (which has small sawtooth coasts of its own). Good job guys! :-D On Thu, Jul 22, 2010 at 11:25 PM, maning sambale emmanuel.samb...@gmail.com wrote: here's how to use the sawtooth webpage and josm http://vimeo.com/13546210 On Wed, Jul 21, 2010 at 9:48 PM, Eugene Alvin Villar sea...@gmail.com wrote: Nice! The Philippines looks a whole lot less bloody since I first put up the webmap. Good work! http://forge.codedgraphic.com/osm/sawtooth_coastlines/ On Sun, Jul 18, 2010 at 10:15 PM, maning sambale emmanuel.samb...@gmail.com wrote: FYI, since we started monitoring the sawtooths, we nuked around 25% of all jagged coasties Less a thousand sawtooth segments to go. Keep it up guys. On Sun, Jul 18, 2010 at 11:26 PM, Eugene Alvin Villar sea...@gmail.com wrote: Thanks to maning's diary entry http://www.openstreetmap.org/user/maning/diary/11240 we're making good progress on fixing those sawtooth coastlines. We are actually getting help from foreigners (many are Germans) in cleaning up our coasts. :-) On Wed, Jul 14, 2010 at 4:02 PM, maning sambale emmanuel.samb...@gmail.com wrote: The top ten islands is almost complete (not in the mandelbrotian sense). I added a new list of coastline bounty in the wiki (11-30 largest islands) http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities Please edit the status as you start working on each island. Note that some have a 99% status already, but, it is good for other eyeballs to have a look and comment on the actual %age and status. -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- http://vaes9.codedgraphic.com -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- http://vaes9.codedgraphic.com -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Hmmm... I guess we can declare this coastline correction task complete? There are still red spots in the webmap but I think these are all residual errors and I'm guessing there are no more SRTM-based coastlines remaining. I think all are now based on Landsat or PGS (which has small sawtooth coasts of its own). Good job guys! :-D On Thu, Jul 22, 2010 at 11:25 PM, maning sambale emmanuel.samb...@gmail.com wrote: here's how to use the sawtooth webpage and josm http://vimeo.com/13546210 On Wed, Jul 21, 2010 at 9:48 PM, Eugene Alvin Villar sea...@gmail.com wrote: Nice! The Philippines looks a whole lot less bloody since I first put up the webmap. Good work! http://forge.codedgraphic.com/osm/sawtooth_coastlines/ On Sun, Jul 18, 2010 at 10:15 PM, maning sambale emmanuel.samb...@gmail.com wrote: FYI, since we started monitoring the sawtooths, we nuked around 25% of all jagged coasties Less a thousand sawtooth segments to go. Keep it up guys. On Sun, Jul 18, 2010 at 11:26 PM, Eugene Alvin Villar sea...@gmail.com wrote: Thanks to maning's diary entry http://www.openstreetmap.org/user/maning/diary/11240 we're making good progress on fixing those sawtooth coastlines. We are actually getting help from foreigners (many are Germans) in cleaning up our coasts. :-) On Wed, Jul 14, 2010 at 4:02 PM, maning sambale emmanuel.samb...@gmail.com wrote: The top ten islands is almost complete (not in the mandelbrotian sense). I added a new list of coastline bounty in the wiki (11-30 largest islands) http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities Please edit the status as you start working on each island. Note that some have a 99% status already, but, it is good for other eyeballs to have a look and comment on the actual %age and status. -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- http://vaes9.codedgraphic.com -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- http://vaes9.codedgraphic.com ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
In some cases, we tend to forget the coastline way direction rule Left-side of the way direction should be land (or counterclockwise around the island) . The garmin map compiler detects this and correct them accordingly in the local file. You can then correct them in osm by looking at my debugging report: http://dl.dropbox.com/u/607635/osm-ph_gps_maps/latest/mkgmap.log.0.txt?dl You can see a lot of routing error reports. For coastline direction, simply search for the anti-island text similar to this one below: 2010/07/29 20:04:59 WARNING (Osm5XmlHandler): philippines.osm: Converting anti-island starting at http://www.openstreetmap.org/?mlat=11.48024mlon=119.65369zoom=17 into an island as it is surrounded by water 2010/07/29 20:04:59 WARNING (Osm5XmlHandler): philippines.osm: Converting anti-island starting at http://www.openstreetmap.org/?mlat=9.31636mlon=117.94467zoom=17 into an island as it is surrounded by water 2010/07/29 20:05:00 WARNING (Osm5XmlHandler): philippines.osm: Converting anti-island starting at http://www.openstreetmap.org/?mlat=5.38158mlon=120.30581zoom=17 into an island as it is surrounded by water Copy the url (i. e. http://www.openstreetmap.org/?mlat=5.38158mlon=120.30581zoom=17) to your favorite editor and reverse the way direction. PS. If you see other error reports in the error logs, try correcting some of them as well. The error blurb should explain the problem. On Thu, Jul 22, 2010 at 11:25 PM, maning sambale emmanuel.samb...@gmail.com wrote: here's how to use the sawtooth webpage and josm http://vimeo.com/13546210 On Wed, Jul 21, 2010 at 9:48 PM, Eugene Alvin Villar sea...@gmail.com wrote: Nice! The Philippines looks a whole lot less bloody since I first put up the webmap. Good work! http://forge.codedgraphic.com/osm/sawtooth_coastlines/ On Sun, Jul 18, 2010 at 10:15 PM, maning sambale emmanuel.samb...@gmail.com wrote: FYI, since we started monitoring the sawtooths, we nuked around 25% of all jagged coasties Less a thousand sawtooth segments to go. Keep it up guys. On Sun, Jul 18, 2010 at 11:26 PM, Eugene Alvin Villar sea...@gmail.com wrote: Thanks to maning's diary entry http://www.openstreetmap.org/user/maning/diary/11240 we're making good progress on fixing those sawtooth coastlines. We are actually getting help from foreigners (many are Germans) in cleaning up our coasts. :-) On Wed, Jul 14, 2010 at 4:02 PM, maning sambale emmanuel.samb...@gmail.com wrote: The top ten islands is almost complete (not in the mandelbrotian sense). I added a new list of coastline bounty in the wiki (11-30 largest islands) http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities Please edit the status as you start working on each island. Note that some have a 99% status already, but, it is good for other eyeballs to have a look and comment on the actual %age and status. -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- http://vaes9.codedgraphic.com -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
here's how to use the sawtooth webpage and josm http://vimeo.com/13546210 On Wed, Jul 21, 2010 at 9:48 PM, Eugene Alvin Villar sea...@gmail.com wrote: Nice! The Philippines looks a whole lot less bloody since I first put up the webmap. Good work! http://forge.codedgraphic.com/osm/sawtooth_coastlines/ On Sun, Jul 18, 2010 at 10:15 PM, maning sambale emmanuel.samb...@gmail.com wrote: FYI, since we started monitoring the sawtooths, we nuked around 25% of all jagged coasties Less a thousand sawtooth segments to go. Keep it up guys. On Sun, Jul 18, 2010 at 11:26 PM, Eugene Alvin Villar sea...@gmail.com wrote: Thanks to maning's diary entry http://www.openstreetmap.org/user/maning/diary/11240 we're making good progress on fixing those sawtooth coastlines. We are actually getting help from foreigners (many are Germans) in cleaning up our coasts. :-) On Wed, Jul 14, 2010 at 4:02 PM, maning sambale emmanuel.samb...@gmail.com wrote: The top ten islands is almost complete (not in the mandelbrotian sense). I added a new list of coastline bounty in the wiki (11-30 largest islands) http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities Please edit the status as you start working on each island. Note that some have a 99% status already, but, it is good for other eyeballs to have a look and comment on the actual %age and status. -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- http://vaes9.codedgraphic.com -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Nice! The Philippines looks a whole lot less bloody since I first put up the webmap. Good work! http://forge.codedgraphic.com/osm/sawtooth_coastlines/ On Sun, Jul 18, 2010 at 10:15 PM, maning sambale emmanuel.samb...@gmail.com wrote: FYI, since we started monitoring the sawtooths, we nuked around 25% of all jagged coasties Less a thousand sawtooth segments to go. Keep it up guys. On Sun, Jul 18, 2010 at 11:26 PM, Eugene Alvin Villar sea...@gmail.com wrote: Thanks to maning's diary entry http://www.openstreetmap.org/user/maning/diary/11240 we're making good progress on fixing those sawtooth coastlines. We are actually getting help from foreigners (many are Germans) in cleaning up our coasts. :-) On Wed, Jul 14, 2010 at 4:02 PM, maning sambale emmanuel.samb...@gmail.com wrote: The top ten islands is almost complete (not in the mandelbrotian sense). I added a new list of coastline bounty in the wiki (11-30 largest islands) http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities Please edit the status as you start working on each island. Note that some have a 99% status already, but, it is good for other eyeballs to have a look and comment on the actual %age and status. -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- http://vaes9.codedgraphic.com ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Here's a little bit more elaboration on the problem of coastlines in Mapnik. This information can be found at the OSM Wiki: http://wiki.openstreetmap.org/wiki/Coastline Unlike every other feature in the OSM database, coastlines are rendered differently in Mapnik. The Mapnik rendering software needs closed polygons to render areas, and since coastlines are the largest and most basic polygons there is on any map, OSM has to ensure that it feeds Mapnik closed coastlines in order to coherently show seas and islands. For zoom levels 0-9, OSM ignores all coaslines data in OSM and uses the public domain VMAP0 data. For zoom levels higher than 9, OSM uses the Coastline error checker tool http://wiki.openstreetmap.org/wiki/Coastline_error_checker to generate closed shapefiles that Mapnik can use. This tool is only run infrequently and that is why coastlines do not update often in Mapnik. On Thu, Jul 15, 2010 at 1:48 PM, maning sambale emmanuel.samb...@gmail.comwrote: On Thu, Jul 15, 2010 at 1:41 PM, Jim Morgan j...@datalude.com wrote: maning sambale wrote, On Thursday, 15 July, 2010 12:01 PM: What I mean here is the mainland of Palawan. But yes the smaller islands needs more work. Hmmm, now I'm beginning to think I didn't understand. I thought you were saying that the coastline of Palawan (yes, the main island) was 99% free of jagged coastlines. But when I look at it I can see about 30% unjagged, and 70% jagged. eg http://www.openstreetmap.org/?lat=9.1627lon=118.2309zoom=13layers=B000FTF Am I looking at the wrong thing here? Do you have a different view with all the jaggies removed? Ah ... or maybe I'm looking at the OSM rendered map, which hasn't been updated. Is that it? In which case, sorry to be dumb. Try the osmarender layer http://osm.org/go/4nECSgr?layers=0B00FTF Mapnik coastlines doesn't update too often. Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ -- cheers, maning ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Eugene Alvin Villar wrote, On Thursday, 15 July, 2010 10:06 PM: http://wiki.openstreetmap.org/wiki/Coastline_error_checker to generate closed shapefiles that Mapnik can use. This tool is only run infrequently and that is why coastlines do not update often in Mapnik. I see what you mean Last update of coastline errors: Wed Apr 14 13:19:17 UTC 2010 Using data available at: 100414 If this is really old it's almost certaintly due to missing daily diffs at http://planet.openstreetmap.org/daily/ In which case you have to wait till after the next weekly dump... I guess something went wrong then ... three months is a long time on OSM Jim ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
The top ten islands is almost complete (not in the mandelbrotian sense). I added a new list of coastline bounty in the wiki (11-30 largest islands) http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities Please edit the status as you start working on each island. Note that some have a 99% status already, but, it is good for other eyeballs to have a look and comment on the actual %age and status. On Wed, Jul 7, 2010 at 2:03 AM, Eugene Alvin Villar sea...@gmail.com wrote: On Tue, Jul 6, 2010 at 2:42 PM, Jim Morgan j...@datalude.com wrote: Eugene Alvin Villar wrote, On Tuesday, 06 July, 2010 11:57 AM: To clarify things, the sawtooth detection script is quite naive. It simply detects if there are at three or more series of nodes where each pair of adjacent nodes have the same latitude or longitude. This will also detect any three linear nodes that all have the same latitude or longitude like this: ooo There are a number of cases where a near-straight line is acceptable. Maybe it would be better -- and I'm not sure if this is possible -- to examine, say, a series of three nodes. It would check if the first two have the same lat or long. If they have the same lat, then the second and third points would need the same long; if they have the same long, then the second and third points would need the same lat. Then you'd be correctly identifying the step-fashion jaggies, rather than straight lines. To increase certainty, you could make this a series of four, or five points. Again I don't know if this is possible or plausible, but it would seem like a better pattern to look for. Not sure if the formatting will come through but p1 |_ p2 | | p3 |__ p4 | I intentionally wanted to detect collinear nodes since I wasn't sure if the original SRTM-based data have those collinear nodes or not. In any case, the script detects sawtooth coasts if the latitude or the longitude is *exactly* the same, right down to the 7th decimal place (which translates to an accuracy of about 1 cm). So if there are a series of coastline nodes that have the same latitude or longitude for each adjacent pair of nodes, then they are most likely generated from raster data, like SRTM. I don't think Mother Nature created coasts that follow latitudes and longitudes. :-) ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
maning sambale wrote, On Wednesday, 14 July, 2010 04:02 PM: Note that some have a 99% status already, but, it is good for other eyeballs to have a look and comment on the actual %age and status. I was surprised to see Palawan as 99% complete, so I whizzed over there for a quick look. I'd have to guess its no more than 30% complete in fact. Quite a long way to go ... but I guess no good satellite pics to trace from. Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
jim, What I mean here is the mainland of Palawan. But yes the smaller islands needs more work. On Thu, Jul 15, 2010 at 11:27 AM, Jim Morgan j...@datalude.com wrote: maning sambale wrote, On Wednesday, 14 July, 2010 04:02 PM: Note that some have a 99% status already, but, it is good for other eyeballs to have a look and comment on the actual %age and status. I was surprised to see Palawan as 99% complete, so I whizzed over there for a quick look. I'd have to guess its no more than 30% complete in fact. Quite a long way to go ... but I guess no good satellite pics to trace from. Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Eugene Alvin Villar wrote, On Tuesday, 06 July, 2010 11:57 AM: To clarify things, the sawtooth detection script is quite naive. It simply detects if there are at three or more series of nodes where each pair of adjacent nodes have the same latitude or longitude. This will also detect any three linear nodes that all have the same latitude or longitude like this: ooo There are a number of cases where a near-straight line is acceptable. Maybe it would be better -- and I'm not sure if this is possible -- to examine, say, a series of three nodes. It would check if the first two have the same lat or long. If they have the same lat, then the second and third points would need the same long; if they have the same long, then the second and third points would need the same lat. Then you'd be correctly identifying the step-fashion jaggies, rather than straight lines. To increase certainty, you could make this a series of four, or five points. Again I don't know if this is possible or plausible, but it would seem like a better pattern to look for. Not sure if the formatting will come through but p1 |_ p2 | | p3 |__ p4 | Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Hehe ... nope I am not trying to defeat the script, but am trying to stop it from misdetecting an already cleaned up coastal area. I have cleaned up the whole of Marinduque a couple of weeks ago and curiously saw the script reporting a sawtoothed section on the northern coastline. I checked it out and found just one single pair of node segment that remained in the step fashion. I nudged the one of the nodes a very small bit just so the latitudes or longitudes will not be exactly equal and hoping to see Marinduque spotlessly clean. :) On Tue, Jul 6, 2010 at 11:57 AM, Eugene Alvin Villar sea...@gmail.comwrote: It's ridiculously easy to defeat the script: just nudge nodes. But the point is not to defeat the script but to check out areas in need of correction. I would assume that anybody moving coastline nodes would do so to correct or refine the data and not simply to defeat the script, right? Right? :-D ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
On Tue, Jul 6, 2010 at 2:42 PM, Jim Morgan j...@datalude.com wrote: Eugene Alvin Villar wrote, On Tuesday, 06 July, 2010 11:57 AM: To clarify things, the sawtooth detection script is quite naive. It simply detects if there are at three or more series of nodes where each pair of adjacent nodes have the same latitude or longitude. This will also detect any three linear nodes that all have the same latitude or longitude like this: ooo There are a number of cases where a near-straight line is acceptable. Maybe it would be better -- and I'm not sure if this is possible -- to examine, say, a series of three nodes. It would check if the first two have the same lat or long. If they have the same lat, then the second and third points would need the same long; if they have the same long, then the second and third points would need the same lat. Then you'd be correctly identifying the step-fashion jaggies, rather than straight lines. To increase certainty, you could make this a series of four, or five points. Again I don't know if this is possible or plausible, but it would seem like a better pattern to look for. Not sure if the formatting will come through but p1 |_ p2 | | p3 |__ p4 | I intentionally wanted to detect collinear nodes since I wasn't sure if the original SRTM-based data have those collinear nodes or not. In any case, the script detects sawtooth coasts if the latitude or the longitude is *exactly* the same, right down to the 7th decimal place (which translates to an accuracy of about 1 cm). So if there are a series of coastline nodes that have the same latitude or longitude for each adjacent pair of nodes, then they are most likely generated from raster data, like SRTM. I don't think Mother Nature created coasts that follow latitudes and longitudes. :-) ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.comwrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we can do to have the PGS coastlines (55MB) uploaded somewhere. [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline [2] http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html [3] http://www.openstreetmap.org/browse/changeset/5129873 [4] http://www.openstreetmap.org/browse/way/4327906 [5] http://www.openstreetmap.org/browse/way/65592780 Eugene On Thu, Jun 17, 2010 at 8:20 PM, maning sambale emmanuel.samb...@gmail.com wrote: UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- http://vaes9.codedgraphic.com ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
@ ed, The technique is outlined here: http://wiki.openstreetmap.org/wiki/Talk:WikiProject_Philippines/Coastline_Corrections Couple of suggestions: 1. short link to the coastline correction wikipage 2. enable link to editors only at higher zoom level (perhaps 15-17?) 3. should be an osm-ph image of the week On Tue, Jul 6, 2010 at 9:20 AM, Ed Garcia eppgar...@gmail.com wrote: Wow! amazing ... how do you detect sawtoothness? can you teach this at the skillshare? OSM genius ka talaga! Anyway, I take note of the sawtooth patterns between Lucena and Pagbilao Quezon ... I have corrected this already but the sawtooth appears only on higher zoom-out levels now. Does this mean it is good as done now? It still appears on yoursawtooth_coastlines map though. ed On Tue, Jul 6, 2010 at 1:04 AM, Eugene Alvin Villar sea...@gmail.com wrote: HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.com wrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we can do to have the PGS coastlines (55MB) uploaded somewhere. [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline [2] http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html [3] http://www.openstreetmap.org/browse/changeset/5129873 [4] http://www.openstreetmap.org/browse/way/4327906 [5] http://www.openstreetmap.org/browse/way/65592780 Eugene On Thu, Jun 17, 2010 at 8:20 PM, maning sambale emmanuel.samb...@gmail.com wrote: UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- http://vaes9.codedgraphic.com ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list
Re: [talk-ph] better ways to coordinate coastline mapping?
Ah I get it ... So it detects node strings that form a step (a horizontal and a vertical combination). It may be good to make mappers aware that such a combination will trigger sawtooth detection by Eugene's script. For there are some coastline contours that are indeed on a step shape. Good way to avoid it is to move the nodes just a bit so the longitude/latitude pairings would not be exactly the same. I found this out on one of my Marinduque island edits. thanks! On Tue, Jul 6, 2010 at 9:31 AM, maning sambale emmanuel.samb...@gmail.comwrote: @ ed, The technique is outlined here: http://wiki.openstreetmap.org/wiki/Talk:WikiProject_Philippines/Coastline_Corrections Couple of suggestions: 1. short link to the coastline correction wikipage 2. enable link to editors only at higher zoom level (perhaps 15-17?) 3. should be an osm-ph image of the week On Tue, Jul 6, 2010 at 9:20 AM, Ed Garcia eppgar...@gmail.com wrote: Wow! amazing ... how do you detect sawtoothness? can you teach this at the skillshare? OSM genius ka talaga! Anyway, I take note of the sawtooth patterns between Lucena and Pagbilao Quezon ... I have corrected this already but the sawtooth appears only on higher zoom-out levels now. Does this mean it is good as done now? It still appears on yoursawtooth_coastlines map though. ed On Tue, Jul 6, 2010 at 1:04 AM, Eugene Alvin Villar sea...@gmail.com wrote: HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.com wrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we can do to have the PGS coastlines (55MB) uploaded somewhere. [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline [2] http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html [3] http://www.openstreetmap.org/browse/changeset/5129873 [4] http://www.openstreetmap.org/browse/way/4327906 [5] http://www.openstreetmap.org/browse/way/65592780 Eugene On Thu, Jun 17, 2010 at 8:20 PM, maning sambale emmanuel.samb...@gmail.com wrote: UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list
Re: [talk-ph] better ways to coordinate coastline mapping?
To clarify things, the sawtooth detection script is quite naive. It simply detects if there are at three or more series of nodes where each pair of adjacent nodes have the same latitude or longitude. This will also detect any three linear nodes that all have the same latitude or longitude like this: ooo (A bit silly, I know, but the middle node should probably be deleted anyway.) The idea of the webmap is to highlight where there are coastlines derived from the raster SRTM data. 99% of our coastlines were derived from SRTM and any sawtooth is an indication that this should be cleaned up to better match the actual coastline (like Landsat or PGS). It's ridiculously easy to defeat the script: just nudge nodes. But the point is not to defeat the script but to check out areas in need of correction. I would assume that anybody moving coastline nodes would do so to correct or refine the data and not simply to defeat the script, right? Right? :-D Another clarification, the webmap is still just an initial map and it doesn't currently do any updates (so maning's recent work on Mindanao's eastern coast won't be picked up yet). I'm working with maning to devise a way to have the map update on a near-daily basis by tying into his OSM-PH Garmin Maps workflow. Wait in the future for this. On Tue, Jul 6, 2010 at 10:17 AM, Ed Garcia eppgar...@gmail.com wrote: Ah I get it ... So it detects node strings that form a step (a horizontal and a vertical combination). It may be good to make mappers aware that such a combination will trigger sawtooth detection by Eugene's script. For there are some coastline contours that are indeed on a step shape. Good way to avoid it is to move the nodes just a bit so the longitude/latitude pairings would not be exactly the same. I found this out on one of my Marinduque island edits. thanks! On Tue, Jul 6, 2010 at 9:31 AM, maning sambale emmanuel.samb...@gmail.com wrote: @ ed, The technique is outlined here: http://wiki.openstreetmap.org/wiki/Talk:WikiProject_Philippines/Coastline_Corrections Couple of suggestions: 1. short link to the coastline correction wikipage 2. enable link to editors only at higher zoom level (perhaps 15-17?) 3. should be an osm-ph image of the week On Tue, Jul 6, 2010 at 9:20 AM, Ed Garcia eppgar...@gmail.com wrote: Wow! amazing ... how do you detect sawtoothness? can you teach this at the skillshare? OSM genius ka talaga! Anyway, I take note of the sawtooth patterns between Lucena and Pagbilao Quezon ... I have corrected this already but the sawtooth appears only on higher zoom-out levels now. Does this mean it is good as done now? It still appears on yoursawtooth_coastlines map though. ed On Tue, Jul 6, 2010 at 1:04 AM, Eugene Alvin Villar sea...@gmail.com wrote: HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.com wrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we
Re: [talk-ph] better ways to coordinate coastline mapping?
Anyway, it seems that Negros is actually the cleanest large island in terms of coastlines. :-) On Tue, Jul 6, 2010 at 11:57 AM, Eugene Alvin Villar sea...@gmail.comwrote: To clarify things, the sawtooth detection script is quite naive. It simply detects if there are at three or more series of nodes where each pair of adjacent nodes have the same latitude or longitude. This will also detect any three linear nodes that all have the same latitude or longitude like this: ooo (A bit silly, I know, but the middle node should probably be deleted anyway.) The idea of the webmap is to highlight where there are coastlines derived from the raster SRTM data. 99% of our coastlines were derived from SRTM and any sawtooth is an indication that this should be cleaned up to better match the actual coastline (like Landsat or PGS). It's ridiculously easy to defeat the script: just nudge nodes. But the point is not to defeat the script but to check out areas in need of correction. I would assume that anybody moving coastline nodes would do so to correct or refine the data and not simply to defeat the script, right? Right? :-D Another clarification, the webmap is still just an initial map and it doesn't currently do any updates (so maning's recent work on Mindanao's eastern coast won't be picked up yet). I'm working with maning to devise a way to have the map update on a near-daily basis by tying into his OSM-PH Garmin Maps workflow. Wait in the future for this. On Tue, Jul 6, 2010 at 10:17 AM, Ed Garcia eppgar...@gmail.com wrote: Ah I get it ... So it detects node strings that form a step (a horizontal and a vertical combination). It may be good to make mappers aware that such a combination will trigger sawtooth detection by Eugene's script. For there are some coastline contours that are indeed on a step shape. Good way to avoid it is to move the nodes just a bit so the longitude/latitude pairings would not be exactly the same. I found this out on one of my Marinduque island edits. thanks! On Tue, Jul 6, 2010 at 9:31 AM, maning sambale emmanuel.samb...@gmail.com wrote: @ ed, The technique is outlined here: http://wiki.openstreetmap.org/wiki/Talk:WikiProject_Philippines/Coastline_Corrections Couple of suggestions: 1. short link to the coastline correction wikipage 2. enable link to editors only at higher zoom level (perhaps 15-17?) 3. should be an osm-ph image of the week On Tue, Jul 6, 2010 at 9:20 AM, Ed Garcia eppgar...@gmail.com wrote: Wow! amazing ... how do you detect sawtoothness? can you teach this at the skillshare? OSM genius ka talaga! Anyway, I take note of the sawtooth patterns between Lucena and Pagbilao Quezon ... I have corrected this already but the sawtooth appears only on higher zoom-out levels now. Does this mean it is good as done now? It still appears on yoursawtooth_coastlines map though. ed On Tue, Jul 6, 2010 at 1:04 AM, Eugene Alvin Villar sea...@gmail.com wrote: HI guys, Here's an *initial* webmap showing where the jagged coastlines are as of July 3: http://forge.codedgraphic.com/osm/sawtooth_coastlines/ The larger the circle, the more jagged steps there are to clean up. Sorry, there's no link going to Potlatch or JOSM/Merkaartor. I'll add that up when I learn more of OpenLayers. But for now, this will have to do. Enjoy! Eugene On Mon, Jul 5, 2010 at 9:30 AM, maning sambale emmanuel.samb...@gmail.com wrote: We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What
Re: [talk-ph] better ways to coordinate coastline mapping?
Just to add, not everything sawtoothed is wrong, I've seen piers and reclamation areas with a similar geometry. The sawtooth webmap simply shows you areas of improvement. On Tue, Jul 6, 2010 at 11:57 AM, Eugene Alvin Villar sea...@gmail.com wrote: I'm working with maning to devise a way to have the map update on a near-daily basis by tying into his OSM-PH Garmin Maps workflow. Wait in the future for this. Working on it. PS. we need more debug tools specific to the Philippines -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we can do to have the PGS coastlines (55MB) uploaded somewhere. [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline [2] http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html [3] http://www.openstreetmap.org/browse/changeset/5129873 [4] http://www.openstreetmap.org/browse/way/4327906 [5] http://www.openstreetmap.org/browse/way/65592780 Eugene On Thu, Jun 17, 2010 at 8:20 PM, maning sambale emmanuel.samb...@gmail.comwrote: UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we can do to have the PGS coastlines (55MB) uploaded somewhere. [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline [2] http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html [3] http://www.openstreetmap.org/browse/changeset/5129873 [4] http://www.openstreetmap.org/browse/way/4327906 [5] http://www.openstreetmap.org/browse/way/65592780 Eugene On Thu, Jun 17, 2010 at 8:20 PM, maning sambale emmanuel.samb...@gmail.com wrote: UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
We missed the June target to to finish the 10 largest islands. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities That's OK. All we need is to finish mainland Mindanao and we can set our radar to the next 20 on the list. We are also working on some webmap to visualize the sawtooth. More on that when its ready. On Sun, Jul 4, 2010 at 5:48 PM, maning sambale emmanuel.samb...@gmail.com wrote: I can load it in my public dropbox. On Sun, Jul 4, 2010 at 2:23 PM, Eugene Alvin Villar sea...@gmail.com wrote: Hi guys, Once we are done with the large islands, the next step is to do the smaller islands. Ian Haylock has helpfully provided the PGS coastlines[1] for the Philippines last year[2] which he edited to combine ways. PGS itself was automatically generated by a software by analyzing the Landsat imagery. Unfortunately, Ian's file was hosted on a free file server and has now expired but I think several people on the mailing list managed to download it. I tried opening the file last year in Merkaartor but my old laptop couldn't handle the data. Now that I have a 4GB-RAM laptop, loading the data into Merkaartor is very manageable. Using the PGS coastlines is much, much easier than tracing Landsat by hand. I tried this with Homonhon Island and editing is way faster than actually uploading it[3]. Hehehe. What I did was to delete the SRTM-derived coastline[4] and replace it with the PGS coastline[5]. I think uploading the PGS coastlines is better for the smaller islands. I'll see what we can do to have the PGS coastlines (55MB) uploaded somewhere. [1] http://wiki.openstreetmap.org/wiki/Prototype_Global_Shoreline [2] http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001071.html [3] http://www.openstreetmap.org/browse/changeset/5129873 [4] http://www.openstreetmap.org/browse/way/4327906 [5] http://www.openstreetmap.org/browse/way/65592780 Eugene On Thu, Jun 17, 2010 at 8:20 PM, maning sambale emmanuel.samb...@gmail.com wrote: UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
UPDATE. Only two islands from the top ten need some coasty coastline love. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections Anyone working on Negros and Mainland Mindanao? On Fri, Jun 4, 2010 at 9:49 PM, maning sambale emmanuel.samb...@gmail.com wrote: yes, please do add those roads make sure to add source:Landsat On Fri, Jun 4, 2010 at 7:44 PM, Ed Garcia eppgar...@gmail.com wrote: hehehe thanks! just too careful not to mess things up. btw, while I was doing the edits, I can see what looks like main roads on the landsat image ... can I assume they are indeed roads showing on landsat? On Fri, Jun 4, 2010 at 7:26 PM, maning sambale emmanuel.samb...@gmail.com wrote: Relax. Those are coastline nodes with tags. The tags are: created_by:srtm_coastline natural:coastline note: Original way #418062 source:SRTM natural:coastline should be given tags in ways and not nodes. You can delete them. On Fri, Jun 4, 2010 at 7:19 PM, Ed Garcia eppgar...@gmail.com wrote: Help! as I was going around Mindoro doing coastline edits, I encountered unfamiliar nodes just about south of Mamburao. The nodes appear as big white squares in JOSM, different from the usual small yellow square nodes. What are they? Did not want to touch them as they are not the usual nodes like the others. On Fri, Jun 4, 2010 at 3:05 PM, maning sambale emmanuel.samb...@gmail.com wrote: On Fri, Jun 4, 2010 at 10:47 AM, Jim Morgan j...@datalude.com wrote: maning sambale wrote, On Thursday, 03 June, 2010 06:22 PM: FYI, I also finished Bohol and Panay. I am starting Samar Island (offline for the moment in order not to break anything). Hah. I went to finish off Bohol myself a few days ago and saw you'd already done it. Don't we have more islands to conquer. :) FYI, I have de-quantized Samar mainland. http://www.openstreetmap.org/browse/changeset/4897757 Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
On Fri, Jun 4, 2010 at 10:47 AM, Jim Morgan j...@datalude.com wrote: maning sambale wrote, On Thursday, 03 June, 2010 06:22 PM: FYI, I also finished Bohol and Panay. I am starting Samar Island (offline for the moment in order not to break anything). Hah. I went to finish off Bohol myself a few days ago and saw you'd already done it. Don't we have more islands to conquer. :) FYI, I have de-quantized Samar mainland. http://www.openstreetmap.org/browse/changeset/4897757 Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Help! as I was going around Mindoro doing coastline edits, I encountered unfamiliar nodes just about south of Mamburao. The nodes appear as big white squares in JOSM, different from the usual small yellow square nodes. What are they? Did not want to touch them as they are not the usual nodes like the others. On Fri, Jun 4, 2010 at 3:05 PM, maning sambale emmanuel.samb...@gmail.comwrote: On Fri, Jun 4, 2010 at 10:47 AM, Jim Morgan j...@datalude.com wrote: maning sambale wrote, On Thursday, 03 June, 2010 06:22 PM: FYI, I also finished Bohol and Panay. I am starting Samar Island (offline for the moment in order not to break anything). Hah. I went to finish off Bohol myself a few days ago and saw you'd already done it. Don't we have more islands to conquer. :) FYI, I have de-quantized Samar mainland. http://www.openstreetmap.org/browse/changeset/4897757 Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Relax. Those are coastline nodes with tags. The tags are: created_by:srtm_coastline natural:coastline note: Original way #418062 source:SRTM natural:coastline should be given tags in ways and not nodes. You can delete them. On Fri, Jun 4, 2010 at 7:19 PM, Ed Garcia eppgar...@gmail.com wrote: Help! as I was going around Mindoro doing coastline edits, I encountered unfamiliar nodes just about south of Mamburao. The nodes appear as big white squares in JOSM, different from the usual small yellow square nodes. What are they? Did not want to touch them as they are not the usual nodes like the others. On Fri, Jun 4, 2010 at 3:05 PM, maning sambale emmanuel.samb...@gmail.com wrote: On Fri, Jun 4, 2010 at 10:47 AM, Jim Morgan j...@datalude.com wrote: maning sambale wrote, On Thursday, 03 June, 2010 06:22 PM: FYI, I also finished Bohol and Panay. I am starting Samar Island (offline for the moment in order not to break anything). Hah. I went to finish off Bohol myself a few days ago and saw you'd already done it. Don't we have more islands to conquer. :) FYI, I have de-quantized Samar mainland. http://www.openstreetmap.org/browse/changeset/4897757 Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
hehehe thanks! just too careful not to mess things up. btw, while I was doing the edits, I can see what looks like main roads on the landsat image ... can I assume they are indeed roads showing on landsat? On Fri, Jun 4, 2010 at 7:26 PM, maning sambale emmanuel.samb...@gmail.comwrote: Relax. Those are coastline nodes with tags. The tags are: created_by:srtm_coastline natural:coastline note: Original way #418062 source:SRTM natural:coastline should be given tags in ways and not nodes. You can delete them. On Fri, Jun 4, 2010 at 7:19 PM, Ed Garcia eppgar...@gmail.com wrote: Help! as I was going around Mindoro doing coastline edits, I encountered unfamiliar nodes just about south of Mamburao. The nodes appear as big white squares in JOSM, different from the usual small yellow square nodes. What are they? Did not want to touch them as they are not the usual nodes like the others. On Fri, Jun 4, 2010 at 3:05 PM, maning sambale emmanuel.samb...@gmail.com wrote: On Fri, Jun 4, 2010 at 10:47 AM, Jim Morgan j...@datalude.com wrote: maning sambale wrote, On Thursday, 03 June, 2010 06:22 PM: FYI, I also finished Bohol and Panay. I am starting Samar Island (offline for the moment in order not to break anything). Hah. I went to finish off Bohol myself a few days ago and saw you'd already done it. Don't we have more islands to conquer. :) FYI, I have de-quantized Samar mainland. http://www.openstreetmap.org/browse/changeset/4897757 Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
yes, please do add those roads make sure to add source:Landsat On Fri, Jun 4, 2010 at 7:44 PM, Ed Garcia eppgar...@gmail.com wrote: hehehe thanks! just too careful not to mess things up. btw, while I was doing the edits, I can see what looks like main roads on the landsat image ... can I assume they are indeed roads showing on landsat? On Fri, Jun 4, 2010 at 7:26 PM, maning sambale emmanuel.samb...@gmail.com wrote: Relax. Those are coastline nodes with tags. The tags are: created_by:srtm_coastline natural:coastline note: Original way #418062 source:SRTM natural:coastline should be given tags in ways and not nodes. You can delete them. On Fri, Jun 4, 2010 at 7:19 PM, Ed Garcia eppgar...@gmail.com wrote: Help! as I was going around Mindoro doing coastline edits, I encountered unfamiliar nodes just about south of Mamburao. The nodes appear as big white squares in JOSM, different from the usual small yellow square nodes. What are they? Did not want to touch them as they are not the usual nodes like the others. On Fri, Jun 4, 2010 at 3:05 PM, maning sambale emmanuel.samb...@gmail.com wrote: On Fri, Jun 4, 2010 at 10:47 AM, Jim Morgan j...@datalude.com wrote: maning sambale wrote, On Thursday, 03 June, 2010 06:22 PM: FYI, I also finished Bohol and Panay. I am starting Samar Island (offline for the moment in order not to break anything). Hah. I went to finish off Bohol myself a few days ago and saw you'd already done it. Don't we have more islands to conquer. :) FYI, I have de-quantized Samar mainland. http://www.openstreetmap.org/browse/changeset/4897757 Jim -- datalude: information security e: j...@datalude.com Philippines: +63 2 403 1311 / mob: +63 920 912 5830 Hong Kong: +852 6840 6693 w: http://www.datalude.com/ -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
Excellent! I updated the wiki page to indicate your progress. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities FYI, I also finished Bohol and Panay. I am starting Samar Island (offline for the moment in order not to break anything). The hard ones are Mainland Mindanao and Palawan. Any takers? On Thu, Jun 3, 2010 at 5:40 PM, Ed Garcia eppgar...@gmail.com wrote: I have just finished the entire eastern coastline of Mindoro. Wondering when they will appear at mapnik? Wasn't there a way to request for re-rendering? Or was that for Osmarender? Use the osmareder to view updates. Update to Mapnik coastlines less frequent. The last update was Wed Apr 14 13:19:17 UTC 2010 http://hypercube.telascience.org/~kleptog/last_update.txt anyway, will work on the western part naman this weekend cheers On Tue, May 25, 2010 at 5:25 PM, Ed Garcia eppgar...@gmail.com wrote: This is via JOSM/WMS Landsat, right? Just the other week, I have done some Agusan coastlines near Cabadbaran City. Ok, I will take Mindoro now ... cheers On Tue, May 25, 2010 at 5:10 PM, maning sambale emmanuel.samb...@gmail.com wrote: The first proposed priority is to focus coastline mapping to the 10 largest islands and then move on to the next. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities I expected lower figures, but it seems we have great coverage already for the top 10 largest islands! - Leyte is almost complete (major work by axk?) - Luzon and Cebu almost there - Bohol will probably take just a few more hours - major work needed for Mindoro, Negros, Samar, Palawan, Panay and Mainland Mindanao Choose you island now after this batch (goal is to finish by end of June 2010), we can move on to the 10 or 20. Anyone up for the challenge? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
The first proposed priority is to focus coastline mapping to the 10 largest islands and then move on to the next. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities I expected lower figures, but it seems we have great coverage already for the top 10 largest islands! - Leyte is almost complete (major work by axk?) - Luzon and Cebu almost there - Bohol will probably take just a few more hours - major work needed for Mindoro, Negros, Samar, Palawan, Panay and Mainland Mindanao Choose you island now after this batch (goal is to finish by end of June 2010), we can move on to the 10 or 20. Anyone up for the challenge? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
Re: [talk-ph] better ways to coordinate coastline mapping?
This is via JOSM/WMS Landsat, right? Just the other week, I have done some Agusan coastlines near Cabadbaran City. Ok, I will take Mindoro now ... cheers On Tue, May 25, 2010 at 5:10 PM, maning sambale emmanuel.samb...@gmail.comwrote: The first proposed priority is to focus coastline mapping to the 10 largest islands and then move on to the next. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities I expected lower figures, but it seems we have great coverage already for the top 10 largest islands! - Leyte is almost complete (major work by axk?) - Luzon and Cebu almost there - Bohol will probably take just a few more hours - major work needed for Mindoro, Negros, Samar, Palawan, Panay and Mainland Mindanao Choose you island now after this batch (goal is to finish by end of June 2010), we can move on to the 10 or 20. Anyone up for the challenge? -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph -- website administrator: - www.waypoints.ph - reeflife.eppgarcia.com PADI Divemaster #491048 ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
[talk-ph] better ways to coordinate coastline mapping?
Another topic that came up during the mapping party is our saw-toothed coastlines. I once did manual editing of the coastlines, such an onerous task! Anyway, I do think we should improve our coastlines a bit more, but just thinking of the 7,107 island seems overwhelming. I propose we take this piece by piece and monitor progress of work. I created a subpage for coastline correction taken from the Data Import page. Please add more info. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections The first proposed priority is to focus coastline mapping to the 10 largest islands and then move on to the next. http://wiki.openstreetmap.org/wiki/WikiProject_Philippines/Coastline_Corrections#Priorities Furthermore, I also believe ianhaylock's PGS coastline proposal should be revived and discussed again. http://lists.openstreetmap.org/pipermail/talk-ph/2009-June/001080.html -- cheers, maning -- Freedom is still the most radical idea of all -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ -- ___ talk-ph mailing list talk-ph@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ph
