I’m wondering if there is a way to avoid HEC-RAS 2D model create subgrid data. For the sake of comparison, I’d like to setup a 1m resultion 2D model with a 1m resolution LiDAR
DEM data and would like to avoid any pre-processing on the DEM so that the numerical simulation is done on the exact same input grid.
the pre-processing is always done. Your grid would have to match the DEM perfectly, not hard if you just took the coordinates of the center of each DEM cell.
I have never tried this, but would be interested to see the results.