Spatial analysis of HEC-EFM results can be done using water surface profiles and grids of depth and velocity produced by a geo-referenced hydraulic model. Past applications of HEC-EFM have used HEC-RAS, HEC-GeoRAS, and HEC-RAS Mapper, which can be found on HEC’s website http://www.hec.usace.army.mil/. Documentation on use of these software is also available at the website.