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@@ -1,5 +1,7 @@
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<!-- meta page description: 3D raster data (voxel) processing in GRASS GIS -->
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<!-- meta page index: raster3D -->
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+<h3>3D Raster maps (voxels) in general</h3>
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GRASS GIS is one of the few GIS software packages with volume data support.
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Here data are stored as a 3D raster with a unit volume called a voxel
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(volume pixel). Voxels are designed to support representations of
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