This is NOT to be used to generate a vector map of USGS quadrangles, because USGS quads are not exact rectangles.
v.mkgrid map=coro_grid grid=4,3 position=coor coor=2716500,6447000 box=20000,20000
Make a 10x12 lat/lon grid, cells 2 arc-min a side, with lower left corner at 167deg 52min east, 47deg 6min south. For use with e.g. QGIS you can then pull this grid into a projected location with v.proj before exporting as a Shapefile with v.out.ogr (within GRASS you could just use d.grid -w from the projected location for the same effect).
v.mkgrid map=p2min_grid grid=10,12 position=coor coor=167:52E,47:06S box=0:02,0:02
Update for new vectors Radim Blazek 10/2004
Last changed: $Date$