Re: [Talk-ca] Clean up - natural coastline
I have completed some tests in Northern BC replacing PGS coastline with GeoBase coastline. This is equivalent to extracting the coastline from CanVec. Doing this is largely waiting for the API to respond, as well as verification and dealing with edges and rivers Sent from my iPad On Jan 28, 2012, at 7:55 PM, Paul Norman penor...@mac.com wrote: From: James A. Treacy [mailto:tre...@debian.org] Subject: Re: [Talk-ca] Clean up - natural coastline On Sat, Jan 28, 2012 at 10:33:09AM -0500, Andrew Allison wrote: Hello: I'm in the process of recreating non-ct data. What areas need to be replaced? I know that some PGS coastline imports are not CT-clean. Importing a coastline from CanVec to replace the PGS data is on my list to-do, but I don't see it happening before CanVec 9.0 since the current coastline model is broken on the west coast and it takes about an hour a tile when there's no other data to replace. ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Clean up - natural coastline
- Original Message - From: Andrew Allison andrew.alli...@teksavvy.com To: talk-ca talk-ca@openstreetmap.org Sent: Saturday, January 28, 2012 3:33 PM Subject: [Talk-ca] Clean up - natural coastline Hello: I'm in the process of recreating non-ct data. Any gotchas that I should look out for in replacing coastline data. 2 main ones - A) direction ( see below), B) coastline ways when taken together should always form an unbroken line around a land mass. minor gotchas C) the coastline import from PGS caused a number of small artefacts to be created, (many 3 node triangles of coastline appearing). These are not true coastline, so need to be dealt with. D) In places the coastline import was run over an area which was well inland of the true coast. The import found water bodes (lakes and rivers) in these areas, and created them as coastline. When recreating these ways it would make sense to tag these correctly. Note very large lakes may still have to be tagged as coastline however. Note, that a lot off C D's I have tried to clear up over the last few months, but I'm still working through them. Pros and Cons of shorter ways. Some of the PGS imports have created very short ways (I've come across whole km of coastline made up of many 2 or 3 node ways) In general when I've been tidying coastlines I've tried to join any sections of coastline less than 40 nodes. Similarly I've come across some very long ways. In general (and its a personal view which I don't always adhere to myself) I don't like ways which are longer than 1,000 nodes. Does direction matter? YES YES YES. Coastline ways MUST be drawn with the water to the right. How often is coastline data updated? Do you mean, how often is the coastline file used to render the coast on the Mapnik layer updated. The answer is periodically, but generally every 4 - 6 weeks David Hope I keep every bodies feet dry and I don't damage something and find out next month that I messed up big time. Or don't bother we are working on that :-) Andrew aka Purple Mustang. ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Clean up - natural coastline
From: David Groom [mailto:revi...@pacific-rim.net] Subject: Re: [Talk-ca] Clean up - natural coastline - Original Message - From: Andrew Allison andrew.alli...@teksavvy.com Subject: [Talk-ca] Clean up - natural coastline Hello: I'm in the process of recreating non-ct data. Any gotchas that I should look out for in replacing coastline data. 2 main ones - A) direction ( see below), B) coastline ways when taken together should always form an unbroken line around a land mass. minor gotchas C) the coastline import from PGS caused a number of small artefacts to be created, (many 3 node triangles of coastline appearing). These are not true coastline, so need to be dealt with. D) In places the coastline import was run over an area which was well inland of the true coast. The import found water bodes (lakes and rivers) in these areas, and created them as coastline. When recreating these ways it would make sense to tag these correctly. Note very large lakes may still have to be tagged as coastline however. Note, that a lot off C D's I have tried to clear up over the last few months, but I'm still working through them. Pros and Cons of shorter ways. Some of the PGS imports have created very short ways (I've come across whole km of coastline made up of many 2 or 3 node ways) In general when I've been tidying coastlines I've tried to join any sections of coastline less than 40 nodes. Similarly I've come across some very long ways. In general (and its a personal view which I don't always adhere to myself) I don't like ways which are longer than 1,000 nodes. Does direction matter? YES YES YES. Coastline ways MUST be drawn with the water to the right. How often is coastline data updated? Do you mean, how often is the coastline file used to render the coast on the Mapnik layer updated. The answer is periodically, but generally every 4 - 6 weeks David Hope I keep every bodies feet dry and I don't damage something and find out next month that I messed up big time. Or don't bother we are working on that :-) Andrew aka Purple Mustang. I've worked out how to get the GeoBase NHN coastline into .osm format and plan to work on the west coast. The PGS is low resolution and there's no other data for most of the area. I don't want to import CanVec, partially because of the extensive coastline cleanup work required to import it properly, partially because I don't see that it adds value importing all of CanVec in an area where it won't be maintained. ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
[Talk-ca] Clean up - natural coastline
Hello: I'm in the process of recreating non-ct data. Any gotchas that I should look out for in replacing coastline data. Pros and Cons of shorter ways. Does direction matter? How often is coastline data updated? Hope I keep every bodies feet dry and I don't damage something and find out next month that I messed up big time. Or don't bother we are working on that :-) Andrew aka Purple Mustang. ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Clean up - natural coastline
On Sat, Jan 28, 2012 at 10:33:09AM -0500, Andrew Allison wrote: Hello: I'm in the process of recreating non-ct data. What areas need to be replaced? -- James (Jay) Treacy tre...@debian.org ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Clean up - natural coastline
On Sat, Jan 28, 2012 at 9:36 PM, James A. Treacy tre...@debian.org wrote: On Sat, Jan 28, 2012 at 10:33:09AM -0500, Andrew Allison wrote: Hello: I'm in the process of recreating non-ct data. What areas need to be replaced? That depends where you are. Be sure to have the latest JOSM and install the licensedetails plugin and open the license details panel. You'll use license details a lot. Have a look at the OSMI license change layer for an overview. Zoom in to your normal mapping area. [1 Long link. Sorry] Once you load an area with JOSM, press the license check button. The plugin will go and get the license details info from the wfte server. If that info returns too quickly make sure you have no objects (or all objects) selected and try again. if you have only one object selected, the plugin will get only the details for that one object. Probably not what you hoped to do. Those license details will appear as red, orange or yellow halos around nodes and ways. [1] http://tools.geofabrik.de/osmi/?view=wtfelon=-97.69336lat=54.31268zoom=4opacity=0.49overlays=overview,wtfe_point_clean,wtfe_line_clean,wtfe_point_harmless,wtfe_line_harmless,wtfe_point_modified,wtfe_line_modified_cp,wtfe_line_modified,wtfe_point_created,wtfe_line_created_cp,wtfe_line_created ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
[Talk-ca] Clean up - natural coastline
Sorry I replied privately by mistake, here a group email On Sat, 2012-01-28 at 21:36 -0500, James A. Treacy wrote: On Sat, Jan 28, 2012 at 10:33:09AM -0500, Andrew Allison wrote: Hello: I'm in the process of recreating non-ct data. What areas need to be replaced? I presume you mean coast line data. good chunk of Lake St Clair, Thames River up to Chatham, Georgian Bay around Tobymory Lake Simcoe, north of Barrie Parts of Lake Superior etc, providing that the geofabrik tool is giving a good representation of the data purge. ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Clean up - natural coastline
From: James A. Treacy [mailto:tre...@debian.org] Subject: Re: [Talk-ca] Clean up - natural coastline On Sat, Jan 28, 2012 at 10:33:09AM -0500, Andrew Allison wrote: Hello: I'm in the process of recreating non-ct data. What areas need to be replaced? I know that some PGS coastline imports are not CT-clean. Importing a coastline from CanVec to replace the PGS data is on my list to-do, but I don't see it happening before CanVec 9.0 since the current coastline model is broken on the west coast and it takes about an hour a tile when there's no other data to replace. ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
