The increasing availability of information about earth surface elevation (Digital Elevation Models DEM) generated from different sources (remote sensing, Aerial Images, Lidar) poses the question about how to integrate and make available to the most than possible audience this huge amount of data. In order to exploit the potential of 3D elevation representation the quality of data management pla...

Galilean satellite. To support the geologic analysis topographic data of high resolution are needed. However, such High resolution (,100 m/pixel) stereo images obtained by data has not been available from the Voyager missions. the Galileo SSI camera are analyzed using photogrammetric techniques to derive local Digital Terrain Models (DTMs) of Low-resolution (p600 m/pixel) topographic profiles G...

Digital Terrain Models (DTMs) are simply regular grids of elevation measurements over the land surface. DTMs are mainly extracted by applying the technique of stereo measurements on images available from photogrammetry and remote sensing. Enormous amounts of local and global DTM data with different specifications are now available. However, there are many geoscience and engineering applications...

Digital terrain models (DTM’s) are widely used in coastal engineering. Reliable height information is necessary for different purposes such as calculating flood risk scenarios, change detection of morphological objects and hydrographic numeric modelling. In this specific field light detection and ranging (lidar) replaces step by step other methods such as terrestrial surveying. However, some ne...

A 2D-hydraulic flood propagation models require accurate elevation data. One of the main problems is frequent changes of land use in major cities, where frequent updating of the digital terrain model (DTM) for flood modelling might be needed. On the other hand the assessment should be based on realistic flood hazard indicator that would help to reflect the real impact of urban development on th...

Very high resolution (VHR) DSMs (digital surface models) derived from stereoor multi-stereo images from current VHR satellites like WorldView-2 or Pléiades can be produced up to the ground sampling distance (GSD) of the sensors in the range of 50 cm to 1 m. From such DSMs the digital terrain model (DTM) representing the ground and also a so called nDEM (normalized digital elevation model) descr...

Airborne Laser Terrain Mapping is a proven technology for topographical surveys with accuracies equivalent to traditional land surveys. It is characterized by an automatic data capture and direct digital data processing. Since about 10 years Airborne Laser Terrain Mapping is an economical alternative to survey large and unaccessible areas, whit a short survey to product realisation time and wit...

Digital modelling of a surface is crucial for Earth science and mining applications many reasons. These days, high-tech digital representations are used to produce high-fidelity topographic in the form terrain model (DTM). DTMs created from 2D data-points collected by variety techniques such as traditional ground surveying, image processing, LiDAR, radar, global positioning systems. At points w...

The Dutch coast is characterized by sandy beaches flanked by dunes. Understanding the morphology of the coast is essential for defense against flooding of the hinterland. Because most dramatic changes of the beach and the first dune row happen during storms, it is important to assess the state of the coast immediately after a storm. This is expensive and difficult to organize with Airborne Lase...