[GRASS-user] nviz: Multiple Vector Maps Draped on Raster DEM

[Rich Shepard]

   From a thread a couple of months ago I learned that nviz will allow only a
single vector map to be draped over the raster base map. For presentation
purposes using ps.map I need multiple vector maps to be displayed on the
raster map.

   Is the best approach to use v.overlay (with the union/OR option) to create
a single vector map that can be incorporated with the raster DEM with nviz?
Or, is there a better approach?

TIA,

Rich