#912: r3.mapcalc depth() and z() function upside down -------------------------+-------------------------------------------------- Reporter: ayepri | Owner: [email protected] Type: defect | Status: new Priority: normal | Milestone: 6.4.0 Component: default | Version: unspecified Keywords: | Platform: MacOSX Cpu: Unspecified | -------------------------+-------------------------------------------------- # computation of a 3d raster with z values from the z() function r3.mapcalc Z='z()' # export to VTK format (see attached image grid_inversed_z.png) r3.out.vtk Z output=./Z_3dg.vtk
In r3.mapcalc, z() function returns -z, and depth() function returns the elevation of the cell. On the grid_inversed_z.png (viewed in Paraview), one can note that higher Z values are at the bottom of the grid (mind the axis at the bottom left). mputed z() isosurfaces are not horizontal (see grid_inversed_deformed_z) -- Ticket URL: <http://trac.osgeo.org/grass/ticket/912> GRASS GIS <http://grass.osgeo.org>
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