Does RiverGIS have the capability to create nested grid areas (with higher resolution) within a larger, coarser grid? I know this can sort of be done by being creative with breaklines, but I would prefer to have polygon areas within my main mesh that are of higher resolution. Also, when RiverGIS creates a 2D mesh, is it able to ensure there are no polygons with more than 8-sides? HEC-RAS does not seem to like polygons with more than 8-sides.
Thanks so much.