HEC-HMS Tutorials and Guides Current: GIS Tools and Terrain Data PDF Download PDF Download page GIS Tools and Terrain Data. Current page Include child pages All pages GIS Tools and Terrain Data Guidance on georeferencing models, preprocessing terrain data, linking terrain data, and delineating basin elements. Applying HEC-HMS GIS Parameter Estimation Tools Creating a Georeferenced Model using HEC-HMS GIS Tools GIS Tutorials and Guides Spatial Results Tutorials ×