On Tue, Oct 2, 2018 at 9:38 PM Francois Chartier <[email protected]> wrote:
> For example, in the example on the webpage, there is a 3D raster for soil > moisture; if the soil moisture is measured only for the top of a cylinder > along your vertical hole, the next moisture measurement is taken at a lower > depth, and the intervals (cylinder length) are not the same along that > vertical axis? > Yes, all are (can be) different. The values are interpolated in between. The input are arbitrary places points. The output is a regular grid. Note, you may need to explore zscale parameter of v.vol.rst because of the how your data looks like. > > Le lun. 1 oct. 2018 à 22:01, Vaclav Petras <[email protected]> a > écrit : > >> On Sat, Sep 29, 2018 at 4:45 PM Francois Chartier <[email protected]> >> wrote: >> >>> Can Grass GIS create a 3D unstructured grid based on a 3D point data set >>> ? >>> >> >> All data and visualizations at the following website were created in >> GRASS GIS including a 3D regular grid (3D raster in GRASS GIS) interpolated >> from a set of 3D points (vector which is 3D, i.e. with z, in GRASS GIS). >> Points were soil properties measurement at different depths, 3D raster is >> then continuous representation of a selected property. >> >> https://geospatial.ncsu.edu/geoforall/multidim-geovis.html >> >> Module used for interpolation was v.vol.rst: >> >> https://grass.osgeo.org/grass74/manuals/v.vol.rst.html >> >> Vaclav >> >
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