I am attempting to prepare Mapsets containing world vector coastline vector maps combined with neatlines to in order to digitize maps. In order to accomplish this, I need to prepare "trimmask" and "landoverlay" maps. I am having trouble preparing these maps. I have patched neatlines with the coastlines and then deleted the neatlines enclosing water areas for the landoverlays and enclosing land areas for the trimmasks but am getting errors when I try to convert the vector landoverlay files to raster files. When I try to display the raster files after running v. to rast, the maps display in one color only and when I run a report on them they have only one catagory. Are there intermediate steps that need to be run? Are there tricks or pitfalls that I need to know and watch for when I delete lines that cross the neatlines? Any help would be appreciated.
Please reply to me at pseymour@sar_ws.fb4.noaa.gov
Thanks in advance:
Paul Seymour
National Ice Center