Hi, I have reuploaded the precompiled sea to http://www.navmaps.eu/wanmil/sea_20120331.zip Changes: * Fixed some floodings * Use a smaller raster to reduce multipolygon artefacts WanMil
Hi,
attached patch uses precompiled sea files to generate the sea areas.
Generating sea areas have always been a source of problems. Little errors in the coastline data could flood whole tiles. A second problem is that generating sea areas often take long CPU time.
After having used a precompilation step for the address assignment I wondered if it would be possible to do something similar for sea areas. After having played around with compiling sea areas myself I remembered that Mapnik also precompiles sea areas. This precompilation can be downloaded at http://wiki.openstreetmap.org/wiki/Coastline#Main_Mapnik_Layer and uses the ESRI shape format. That makes things very easy :-)
I used the geotools lib and converted the sea information to our well known boundary format and added a small code addition to the mkgmap SeaGenerator.
Attached patch does not include the ESRI shape conversion (I have to think about how to put that into the mkgmap code base - lots of geotools libs have to be included). But I have uploaded the whole world to http://www.navmaps.eu/wanmil/sea_20120331.zip.
The new mkgmap parameter --precomp-sea=<dir with sea files> must be added. So unzip the sea_20120331.zip file to a directory called sea. Call the patched mkgmap with java -jar mkgmap.jar <.. your mkgmap options..> --precomp-sea=sea *.osm.pbf
I am sure there are some problems left and the code patch should be cleaned up (better integration of the BoundaryXXX classes). But the first results looked so well that I want to give you the early chance to play with it.
Now I hope it should also be possible to create a tile in the atlantic/pacific ocean without any data but full of sea.
WanMil
_______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev