New Census Edge Data Available
New Tiger/Line(R) Data is available from http://www.census.gov/geo/www/tiger/
We installed the new data files and it is definitely more accurate than the older data. Power lines that appeared on the wrong sides of some roads are now appearing on the correct side and most roads in general look better. A few edges seem to have gaps (possibly from the import to PostGIS) though it looks like it should not take long to fix up using QuantumGIS.
All Lines is the file you are looking for if you want roads, rivers, and railroads. It is only available at the county level, so you have to select your state and county. After downloading, I used the following command to load into PostGIS:
shp2pgsql -W "Latin1" -I -s 4326 tl_... public.tigeredge | psql -d coopgis
Where tl_... represents the name of the shape file in the current directory (without extensions).
I am working on updating PostGIS to perform all road calculations from this layer. Those changes will be available with the 0.6 version, planned for 12/2009.
The Shape files are available from http://www.census.gov/geo/www/tiger/
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