I have a DEM interpolated from a TLS point cloud at 1 mm cell resolution. This resolution is too fine for use in a 2D surface inundation model with the required timestep, without the model taking far too long to run. I would like to know if there is any way to proportionally increase the size of each cell and its z value in the raster?
For example, if a cell is currently 0.001 x 0.001 m, is it possible to multiply these dimensions and the z value for each cell by 1000, resulting in a raster that preserves the morphology of the DEM but is at 1 m resolution?
Note also that each DEM is referenced to a local coordinate system set up in a lab.
I'm working in Arc 10.4.1 desktop (advanced licence), but happy to try other open source GIS options.