DTM from Laserscan
Throughout Germany grid-laser scan data (format: 1x1 km ² tile in the 1m-grid) is provided in high resolution from the responsible authorities of the federal states. The grid-laser scan data contains already georeferenced, in a grid arranged points, which describe the ground level. Besides of the already simplified laser scan-recording the data volume is enermous and only a few CAD-systems can process this amount of data.
Our civil engineering software makes the use and the processing of the grid-laser scan data possible. The laser scan data is always stored in the project directory and is not loaded into the CAD in order to keep the capacity utilisation of the CAD as low as possible. Through a constructed reference to the tile the information about height can be interrogated very fast off the CAD. In the CAD only the limiting of the tile is drawn. For further adaptation, e.g. the generation of a terrain section, the appropriate information is evaluated and illustrated in the CAD. The data is not thinned out and is therefore to the full extent available.
The advantages of this method are:
- use and processing of very big grid-laser scan data
- no point limiting through CAD-systems
- no complex and expensive GIS necessary
- no hardware constraints
- no reloading or thinning of data
- terrain-section and quantity survey over several kilometres
- planning over the whole surface possible
- extensive visualisation
Surface analyses, planning of infrastructure and profiles can be liquidated over several kilometres. For the visual analysis all functions of the DTM-analysis (contours, contour levels and inclination arrows) are available. Additionally there is the opportunity to fade in Open Street Map data (OSM) for each tile. The OSM-data is provided by BBSoft® for whole Europe.
Hillshade surfaces can be generated as a further analysis-function. This shading model gives the user a spatial impression of the relative altitude differences in the terrain. The graphical support of the Hillshade and of the OSM-data help the user to classify the exact area of planning spatially. The system offers a pleasant and high-power visualisation.
required modules: BB-VGR, BB-VDGM