On Fri, Jul 2, 2010 at 11:01 AM, Erik G. Burrows <[email protected]>wrote:
> > These areas are made publicly available through several US government > agencies, including the US Forest Service, Bureau of Land Management, > National Park Service, etc. The "National Atlas" site makes all of the > Wilderness Areas available for download as a single shapefile: > > http://www.nationalatlas.gov/mld/wildrnp.html > > (There is also a ton of other great information available for download at > this site.) > > some data is very low resolution and shouldn't be imported if there is a chance to get highres data from other sources > > > I think there will need to be a substantial amount of manual work done to > ensure no data duplication occurs, and some cleanup of enclosing boundary > areas, so the process I'm planning on using is fairly manual: > > yes, this is a lot of manual work and can't be fully automated. > 1. Convert the National Atlas shapefile into KML using ogr2ogr.* > *The intermediate step through KML format is necessary because gpsbabel > below needs 3-D coordinates on input, but this shapefile is 2-D. The KML > file allows for manual (perl script) addition of a zero-value > z-coordinate. > > 2. Convert the KML file into OSM format using gpsbabel. > > 3. Use JOSM to add each area to the OSM database manually by copying areas > from the shapefile-derived layer to the downloaded OSM layer for that > region. > > Some metadata is lost in this process, such as the area state, state FIPS > code, managing agency, unique ID and URL to wilderness.net. In order to > restore this data, I plan to either create a patch for gpsbabel to tunnel > this metadata through, or create a perl script to copy this data from the > KML file to the OSM file. > > I recommend shp2osm which can do all this in one shot. there is a perl version, the Java version from Ian Dees and also a beta of ogr2osm. all can convert in one step and preserve the attributes. I have used mainly the Java version because it has a flexible interface for attribute translation. ogr2osm is nice when you have touching areas and need to convert to advanced multipolygons with relations.
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