MeshMapping

Description

MeshMapping is a tool to change the elevation of the nodes of a 2D mesh according to a raster file (*.asc, *.grd, *.xyz) or another 2D mesh. The x-y coordinates remain unchanged, while the z-coordinates of the input mesh are adjusted according to the raster used for mapping.

Usage

   MeshMapping  -i <string> -o <string> [-r <string>] [-m <string>]
                [-d <number>] [-s <number>] [--lowpass] [--] [--version] [-h]

Where:
     (required)  Input mesh file (*.vtu, *.msh)

   -o <string>,  --output <string>
     (required)  Output mesh file (*.vtu)

   -r <string>,  --raster <string>
     Raster file (*.asc *.grd *.xyz) to map the input file on.

   -m <string>,  --mesh <string>
     2D mesh file (*.vtu) to map the input file on.

   -d <number>,  --distance <number>
     Maximum distance to search for mesh nodes if there is no corresponding
     data for input mesh nodes on the mesh it should be mapped on. (Default
     value: 1)

   -s <number>,  --static <number>
     Static elevation to map the input file to. This can be combined with
     mapping based on rasters or other meshes to deal with locations where
     no corresponding data exists.

   --lowpass
     Applies a lowpass filter to elevation over connected nodes.

   --,  --ignore_rest
     Ignores the rest of the labeled arguments following this flag.

   --version
     Displays version information and exits.

   -h,  --help
     Displays usage information and exits.

Example

Mapping the input mesh to a digital elevation model (DEM).

B-z B-x

Fig. 1 Both images show the INPUT mesh from two different point of views. The upper image shows the view along the z-axis. The lower image shows the view along the x-axis.

MeshMapping -i Berlin.vtu -o Berlin_mapped.vtu -r DEM.asc

The command above maps the mesh Berlin.vtu to the mesh Berlin_mapped.vtu according to the elevation given in DEM.asc. Differences can be seen comparing Fig.1 and Fig.2, especially comparing the lower images.

B-map-z B-map-x-scale10

Fig. 2 Both images show the OUTPUT mesh from two different point of views. The upper image shows it viewing along the z-axis. The right image shows it viewing along the x-axis. To increase the visibility of the elevation, z-values are scaled by factor of 10.

This article was written by Julian Heinze. If you are missing something or you find an error please let us know.
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