This is a common one.. today I got a common request from a reader.. "where can I obtain VMap data? My response which may help some of you asking the same thing:
See the following:
VMAP1 and other global datasets are available from the NGA Raster Roam -http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.html
To access VMAP1 data see http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/vmap1_legend.html
see also these useful help docs:
Free Download of VMAP1 - Vector Smart Map FTP links http://www.gisuser.com/content/view/5535/
The search on GISuser yields some great results and you can try this custom Google GIS Data search DB that I developed
I would urge you to be careful buying this data online as most commercial resellers simply download from these FTP sites, cut to a CD / DVD and send to you.. save your $$. There's many online sources of these data but these tips should get you started and atleast pointed in the right direction.