Turns a 3D mesh file into a Digital Elevation Model (DEM) of class RasterLayer
format.
Usage
mesh_to_dem(mesh, res, fill = TRUE)
Arguments
- mesh
A mesh3d object.
- res
(Optional) The desired DEM resolution in same units at the 3D mesh.
- fill
Logical. Fill NA values in raster with minimum value?
Value
A dem of class RasterLayer.
Details
The function rasterizes uses the vertices of the mesh file.
If resolution is not
given, it is calculated by finding the maximum nearest neighbor
of vertices projected
on the xy plane. fill is used when irregular 3D meshes
result in NA values in
raster cells. The default is to fill these cells with the
minimum, non-NA raster value.
Examples
dem <- mesh_to_dem(mcap)
raster::plot(dem)
dem <- mesh_to_dem(mcap, res = 0.05)
raster::plot(dem)
# Don't fill empty raster cells
dem <- mesh_to_dem(mcap, res = 0.02, fill = FALSE)
raster::plot(dem)
