Re: [Talk-us] Fixing shorelines
* Eric H. Christensen e...@christensenplace.us [2012-12-13 21:54 -0500]: On Thu, Dec 13, 2012 at 02:23:52PM -0500, Phil! Gold wrote: If you use JOSM, the ContourMerge plugin is very helpful here. Thanks for the advice. I've tried that technique and it seems to have done what I wanted but I'm withholding judgment until I actually see the results on the website. That might take a while. The data used to render coastlines is generated irregularly on approximately a monthly basis. You can take a look at an area a little ways north where I've done the same thing: http://osm.org/go/ZZfHNr1i . I've not been very impressed by the TIGER roadway data in my little town Yeah. The TIGER data for Anne Arundel County was really horrid at the time of the import. I've cleaned up a bunch of it in the northwest corner of the county (areas near BWI, Fort Meade, and Laurel), but there's a lot left to do. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Fixing shorelines
* Jeff Meyer j...@gwhat.org [2012-12-13 12:58 -0800]:
On Thu, Dec 13, 2012 at 11:23 AM, Phil! Gold phi...@pobox.com wrote:
I use tilestache to go between
JOSM's tile underlays and the ArcGIS REST interface).
Do you have a pointer to any docs of how to do this?
It's pretty simple. You use tilestache's URL template provider to proxy
requests to the REST server. It works as long as the server supports the
web mercator projection, which might be under any of the SRIDs 900913,
102113, 102100, 3785, or 3857. (The last is the current official code
from EPSG.) Here's what I use for Anne Arundel County's orthoimagery:
{
layers: {
AAOrtho2010: {
provider: {
name: url template,
template:
http://gis-world.aacounty.org/ArcGIS/rest/services/Ortho2010/MapServer/export?f=imagebboxSR=102113bbox=$xmin,$ymin,$xmax,$ymaxsize=$width,$heightformat=png24;
},
preview: {
lat: 38.974,
lon: -76.595,
zoom: 10
}
}
}
}
For their vector-based data, I add `transparent=true` so I can overlay it
on aerial imagery:
AABasemap: {
provider: {
name: url template,
template:
http://gis-world.aacounty.org/ArcGIS/rest/services/Basemap/MapServer/export?f=imagebboxSR=102113imageSR=102113transparent=truebbox=$xmin,$ymin,$xmax,$ymaxsize=$width,$heightformat=png;
},
}
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Re: [Talk-us] Fixing shorelines
Muchas gracias!
On Fri, Dec 14, 2012 at 7:49 AM, Phil! Gold phi...@pobox.com wrote:
* Jeff Meyer j...@gwhat.org [2012-12-13 12:58 -0800]:
On Thu, Dec 13, 2012 at 11:23 AM, Phil! Gold phi...@pobox.com wrote:
I use tilestache to go between
JOSM's tile underlays and the ArcGIS REST interface).
Do you have a pointer to any docs of how to do this?
It's pretty simple. You use tilestache's URL template provider to proxy
requests to the REST server. It works as long as the server supports the
web mercator projection, which might be under any of the SRIDs 900913,
102113, 102100, 3785, or 3857. (The last is the current official code
from EPSG.) Here's what I use for Anne Arundel County's orthoimagery:
{
layers: {
AAOrtho2010: {
provider: {
name: url template,
template:
http://gis-world.aacounty.org/ArcGIS/rest/services/Ortho2010/MapServer/export?f=imagebboxSR=102113bbox=$xmin,$ymin,$xmax,$ymaxsize=$width,$heightformat=png24
},
preview: {
lat: 38.974,
lon: -76.595,
zoom: 10
}
}
}
}
For their vector-based data, I add `transparent=true` so I can overlay it
on aerial imagery:
AABasemap: {
provider: {
name: url template,
template:
http://gis-world.aacounty.org/ArcGIS/rest/services/Basemap/MapServer/export?f=imagebboxSR=102113imageSR=102113transparent=truebbox=$xmin,$ymin,$xmax,$ymaxsize=$width,$heightformat=png
},
}
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--
Jeff Meyer
Global World History Atlas
www.gwhat.org
j...@gwhat.org
206-676-2347
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Re: [Talk-us] Fixing shorelines
On Tue, Dec 11, 2012 at 9:24 PM, Eric H. Christensen e...@christensenplace.us wrote: I just moved to the Deale, Maryland area and am working on cleaning up the Tiger data and mapping as many POI as I can. I found that the shoreline here, though, is very rough. Along the Chesapeake Bay the TIGER/Line® 2008 Place Shapefiles appears to outline the separation of water and land quite well but is labeled as an administrative boundary. The water boundary is sourced from PGS and does a good job in some areas but lacks much detail that the other provides. Is there a good way to make the PGS-sourced data match the Tiger data in certain areas to improve the accuracy? I've seen the same thing, but on the Virginia side. I don't think there's a magical solution, but a rather hard one. I've painstakingly manually merged nodes, deleted ways, and modified relations so where appropriate there is a single way referenced by the admin boundary and tagged as coastline. Very painful and slow going, especially so when you might have to deal with multiple relations and other messy connections. -Josh ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Fixing shorelines
On Thu, Dec 13, 2012 at 11:23 AM, Phil! Gold phi...@pobox.com wrote: I use tilestache to go between JOSM's tile underlays and the ArcGIS REST interface). Do you have a pointer to any docs of how to do this? -- Jeff Meyer Global World History Atlas www.gwhat.org j...@gwhat.org 206-676-2347 ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Fixing shorelines
On Thu, Dec 13, 2012 at 2:58 PM, Jeff Meyer j...@gwhat.org wrote: On Thu, Dec 13, 2012 at 11:23 AM, Phil! Gold phi...@pobox.com wrote: I use tilestache to go between JOSM's tile underlays and the ArcGIS REST interface). Do you have a pointer to any docs of how to do this? If you spot any imagery or data you'd like to glean from an ArcGIS web interface, please let me know as I'm more than happy to proxy it through the OSM US server. ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
Re: [Talk-us] Fixing shorelines
On Thu, Dec 13, 2012 at 02:23:52PM -0500, Phil! Gold wrote: * Eric H. Christensen e...@christensenplace.us [2012-12-11 21:24 -0500]: Is there a good way to make the PGS-sourced data match the Tiger data in certain areas to improve the accuracy? If you use JOSM, the ContourMerge plugin is very helpful here. You can select nodes on each of the TIGER and PGS ways near where they diverge from each other and then drag the coastline onto the administrative boundary. Be aware that both the TIGER and PGS imports periodically split ways to keep them from getting too long, so you might have to do the merging in several places along the full length of the overlap. Thanks for the advice. I've tried that technique and it seems to have done what I wanted but I'm withholding judgment until I actually see the results on the website. Even the TIGER data isn't perfect (though it's far better than PGS, at least in Maryland), so what I like to do it use the JOSM ImproveWayAccuracy plugin to align the administrative boundary to aerial imagery and then use the ContourMerge plugin to overlap the coastline ways. If there's no administrative boundary, I just use the ImproveWayAccuracy plugin on the coastline ways directly. Another great tool. On a side note, Anne Arundel County is kind enough to put their geodata into the public domain, plus they've got an ArcGIS REST server at http://gis-world.aacounty.org/ArcGIS/rest/services/ . I find their basemap, parcel, and orthoimagery layers to be very useful (although JOSM can't use them directly, as far as I know; I use tilestache to go between JOSM's tile underlays and the ArcGIS REST interface). I haven't seen that data before but will have to take a look at what's there. I've not been very impressed by the TIGER roadway data in my little town so I've been slowly making changes or verification that the data is correct. I just moved here so I'm just getting started on this project. -Eric pgp6K1uQ9EdgS.pgp Description: PGP signature ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
[Talk-us] Fixing shorelines
I just moved to the Deale, Maryland area and am working on cleaning up the Tiger data and mapping as many POI as I can. I found that the shoreline here, though, is very rough. Along the Chesapeake Bay the TIGER/Line® 2008 Place Shapefiles appears to outline the separation of water and land quite well but is labeled as an administrative boundary. The water boundary is sourced from PGS and does a good job in some areas but lacks much detail that the other provides. Is there a good way to make the PGS-sourced data match the Tiger data in certain areas to improve the accuracy? If you'd like to see what I'm talking about take a look at the area around N38.7773972 W76.543262. Thanks. -- Eric -- Eric H Christensene...@christensenplace.us Sparks spa...@fedoraproject.org . .-.. .-.. --- .-- --- .-. .-.. -.. 097C 82C3 52DF C64A 50C2 E3A3 8076 ABDE 024B B3D1 -- pgpEXm5QI7TEi.pgp Description: PGP signature ___ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
