GRAS is using state-of-the-art object oriented technology to map urban environments in very high resolution. Impervious surfaces such as roads, buildings, parking lots and driveways can be mapped. Detailed maps of imperviousness is an important component in urban storm water modelling and flood risk mapping.
GRAS is an authorized distributor of all the key types of satellite images such as GeoEye-1, QuickBird, Ikonos, SPOT, Formosat and several more including the new WorldView-2. The WorldView-2 satellite offers new possibilities within thematic mapping such as detailed vegetation analysis, topograhic and bathymetric mapping and marine monitoring
GRAS has developed a cost-effective method for bathymetric mapping based on high resolution satellite images. The approach exploits the fact that different wavelengths of light are attenuated by water to differing degrees, which allows mapping of bathymetry in water down to 25-30 meters in depth under optimal conditions.
GRAS is using operational setups to map and deliver suspended sediment values in near real time. Monitoring of suspended sediments is used for coastal management and construction projects and can be delivered with a historic baseline of absolute concentrations going back to 2000 with a spatial resolution of 250m.
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DHI GRAS A/S · Agern Allé 5 · DK-2970 Hørsholm · Denmark · Tel. +45 4516 9100 · firstname.lastname@example.org