3D Raster data (voxel) in GRASS GIS
3D Raster (voxel) import
The module r3.in.ascii supports
generic x,y,z import. Alternatively, voxels are be interpolated
from 3D point clouds as transformed from 3D point vector data
Always the full map is imported.
Voxel region settings and 3D MASK
GRASS 3D raster map processing is always performed in the current 3D region
settings (see g.region), i.e. the current
region extent, vertical extent and current 3D resolution are used.
If the 3D resolution differs from that of the input raster map(s),
on-the-fly resampling is performed (nearest neighbor resampling).
If this is not desired, the input map(s) has/have to be reinterpolated
beforehand with one of the dedicated modules.
Masks can be set (r3.mask).
Powerful 3D map algebra is implemented in r3.mapcalc.
3D vector point data can be converted to a GRASS 3D raster map
Layers from a 3D raster map can be converted to a 2D raster map
From 3D vector points, GRASS 3D raster maps can be interpolated
(v.vol.rst). Results are volumes,
or 2D raster maps can be also extracted.
GRASS 3D raster maps can be exported to VTK (r3.out.vtk).
VTK files can be visualized with the
GRASS 2D raster maps can be exported to VTK with r.out.vtk,
GRASS vector maps can be exported to VTK with v.out.vtk.
Alternatively, GRASS 3D raster maps can be imported and exported from/to Vis5D
Finally, export to 3D ASCII is also possible (r3.out.ascii).
Introduction to GRASS raster map processing
Main index - raster3D index - full index