If you need more information on GeoSAR please send us an email and we will provide you with additional information. It is only available over Papua New Guinea and Geoimage are the only Australian company that can sell this product. What is unique about GeoSAR is it penetrates tree canopy allowing for greater detail over your AOI. Often, because of scale and environment, differentiation between DSM and DTM is unnecessary, (e.g., SRTM derived DEM at 30 m or 90 m resolution). This airborne mapping system allows generation of topographic maps and other derived products. A Digital Elevation Model (DEM) is a generic term for an elevation model, which encapsulates both DSMs and DTMs, and can be generated from various methods. Geoimage also provide GeoSAR which is a 5m DEM product that produces 3D data and radar imagery. This will include the heights of cultural features such as buildings, roads and vegetation as well as bare earth.Ī Digital Terrain Model (DTM) represents the bare ground surface in which all the cultural features such as buildings and trees have been removed.įigure Below: 1m Tri-Stereo DEM over Melbourne CBD Geoimage’s internal processing team can apply two variations of DEMs (DSM or DTM) to your satellite imagery depending on your requirements:Ī Digital Surface Model (DSM) represents the Earth’s surface and includes all objects on it. A DEM is a digital model or 3D representation of a terrain’s surface – created from terrain elevation data. Digital Elevation Models (DEMs) and GeoSARĭigital Elevation Models (DEMs) are an integral part of any geospatial analysis.
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