On Tue, Mar 30, 2010 at 11:08:40PM -0800, NopMap wrote:
- What level of confidence do you achieve with generate sea? Many posts still mention minor failures, disappearing islands etc.
As far as I am concerned, it just works. Any errors will be logged and will come through my error message filter. You can fetch my scripts and files at http://www.polkupyoraily.net/osm/ and adapt to your area. Also, when debugging coastline errors (gap in coastline, coastline not extending to map border), you may want to use a command like this: osmosis --rx finland.osm.bz2 --tf accept-ways natural=coastline --used-node \ --wx finland-coastline.osm The resulting file should be so small that you can load it in JOSM to see the way and node ids of the broken coastlines.
- Is it possible to save the resulting sea/land polygons for later re-use? Apparently the OSM data changes more frequently than the actual coastline and re-generating it from scratch every time you update is not necessary.
Generating the coastline is not that slow any more. If you absolutely wanted, I guess you could generate a separate map layer with just the sea, and compile your regular map without --generate-sea. Marko