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OSMFieldwork

Posted by db48x on 27 July 2008 in English.

Found out about Gerv's pledge to speed up mapping the , which is a cool idea. Spent a few hours this morning getting the Yahoo WSM plugin for JOSM working again, then went over a number of islands to find some that are missing their coastlines. Traced Cayman Brac, Little Cayman, Barbuda and Redonda from Yahoo imagery.

Also, I ogled some fancy GPS gear. The Magellan MobileMapper 6 looks pretty sweet.

Location: Houston, Harris County, Texas, United States

Discussion

Comment from lwu on 13 August 2008 at 05:11

Hey, nice work -- I see Cayman Brac and Little Cayman.

Do you know why the larger Cayman Islands don't appear? Mapnik fails to render the coastlines: http://openstreetmap.org/?lat=19.3537&lon=-81.268&zoom=12&layers=B00FTF
even though I can see them imported through PGS and tagged as natural=coastline with the appropriate directions in Potlatch.

The (Georgetown) Cayman Islands coastlines don't seem appear in the Coastline viewer, but do show in the osmarender:

http://openstreetmap.org/?lat=19.3485&lon=-81.2598&zoom=12&layers=0B0FTF

Comment from db48x on 13 August 2008 at 20:29

Thanks. I'm not really sure why the coastlines don't always show up, I'd noticed it too. I think that perhaps it doesn't know that these tiles are supposed to be mixed land/sea tiles, and is instead rendering them as sea. The presence of roads apparently doesn't deter it. Try visiting informationfreeway.org and viewing this island at zoom level 12. Then hit 'x' for each tile and maybe we can convince it that it really is mixed and not sea. Of course, perhaps that only affects osmarender and not mapnik, but it's worth a try.

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