New Datum CGG2013 applications for DSM-DEM-DTM preparation from earth observation satellites data

English Abstract:

The high resolution Digital Surface Model (DSM), Digital Elevation Model (DEM) and Digital Terrain Model (DTM), a topographic model of the bare earth-terrain relief (DTM=DEM of the earth surface), are valuable data for many earth studies applications. Many regions, including Canada, lack the high resolution DSM-DEM-DTM. We have compared the DEM obtained from satellite datasets, including Canadian Radarsat-2, German TanDEM-X DEM, and Japanese ASTER. The Bathymetry Model (BM) was development into a DTM compilation by subtracting the BM from the DSM. The high resolution Global Navigation Satellite System (GNSS) collection equipment GPS Pathfinder ProXRT GLONASS (the real-time receiver can achieve decimeter (10 cm) accuracy), with satellite OmniSTAR G2 satellite subscription are used for the field elevation data collection. Calibration and verifications of the DSM-DEM-DTM were done in the research area, North West Territory, by using the new Geoid stations, CGVD2013. The critical points along the road profile with the new Geoid stations and the Slave River, bare rock outcrops, including Slave River upstream, Fort Smith town, and downstream, Fort Resolution town, were used to the height reference. The new updated Geoid CGG2013 stations are used as the main DSM-DEM-DTM reference points. Ice thickness and water depth are measured along the Slave River by auger drilling. The collected field data and processed satellite data with prepared DSM-DEM-DTM are to be used for the ice jam and flood predictions along the Slave River, NWT, Canada.