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Terrain Data with OSM world boundaries

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martin

17 Dec, 2011 02:13 PM

Hello TileMill Community,
I am new to TileMill but I have already created some Maps using Mapnik on the command line.
First of all I wanna say, that TileMill is an amazing software speeding map development up tremendously. Thanks to all contributors!

I have imported the world_boundaries_m.shp file from Openstreetmap which can be downloaded here: http://tile.openstreetmap.org/world_boundaries-spherical.tgz

After I have imported the boundaries shapefile I tried to create some terrain data following this tutorial:
http://mapbox.com/tilemill/docs/tutorials/terrain-data/

It all worked perfectly but the terrain doesn't fit the underlying world boundaries file. I have attached a screenshot where you can see that the terrain is placed a little bit too far north. Maybe some experts can tell me what is wrong by looking at the screenshot? I have done all the converting to Spherical Mercator of course.

Thanks in advance
Martin

• Bildschirmfoto_2011-12-17_um_15.02.55.jpg 38.7 KB

1. Support Staff 2 Posted by AJ on 19 Dec, 2011 11:22 PM

   

   What projection have you set your world boundaries shapefile layer to? It looks like the data is stored in EPSG:3395 which is not quite the same as the 900913 option in TileMill and would such an offset if you have set it to 900913. Try setting the layer srs field to +init=epsg:3395.

   Also that the files in world_boundaries-spherical.tgz are quite out of date (March, 2007), although there is no good replacement for them that includes both land and borders. For up-to-date land from OSM use either the processed_p file or the shoreline_300 file (a simplified version of processed_p).

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2. Tom MacWright closed this discussion on 16 Feb, 2012 12:05 AM.

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