Most of the data type options are CAD surfaces. Esri shapefiles work but they are a huge amount of data compared to a raster. Most other softwares let you define an underlying terrain with a raster
The message prompting before every simulation computing is ambiguous - is it necessary to regenerate grid each time I want to compute model? Probably not if the grid wasn't changed.
most open source elevation data is in raster format.
most people who do hydraulic modeling will be most familiar with this. these data sets are easy to work with and generally less cumbersome than input options available.
i am having to use a la...
