Digital Elevation Model Creation
A digital elevation model (DEM) is a type of digital terrain model, recording a topographical representation of the Earth's terrain or another surface in digital format. For use with the Flood Modeller a seamless, high resolution DEM of the land and the immediate surrounding waters is needed.
The seamless dataset is the foundation for subsequent investigations including the imposition of different sea-level rise scenarios on the static landscape, the modeling of tidal currents and the effect of wind on waves, currents, and water level elevation, and the consideration of the effects of storm-surges. The suite of tools used for the creation of the DEM allows GeoNet to:
- Import elevation point data from a variety of files
- Filter points which are vertically or horizontal out of range
- Import boundary and shoreline polygons
- Import geo-referencing information as required
- Import point validation data
- Build a DEM
- Visualize the DEM
- Make corrections to the DEM
- Patch areas within the DEM with correspond elevations from another source
- Validate a DEM
- Export a DEM in a format useful to the flood modeler