| | 1 | == DEM scripts == |
| | 2 | This page details and explains the use of the DEM creation scripts: |
| | 3 | '''lidardem.sh'''[[BR]] |
| | 4 | '''asterdem.sh'''[[BR]] |
| | 5 | '''nextmapdem.sh'''[[BR]] |
| | 6 | '''lidar_aster_dem.sh''' |
| | 7 | The scripts listed are written in bash. |
| | 8 | |
| | 9 | These scripts are used to create a DEM from LiDAR and elevation model tiles. |
| | 10 | The scripts use grass GIS to read in the elevation tiles and perform patching and various other operations on the data to create a DEM. |
| | 11 | GRASS is a GIS (Geograohic Information System) and details of it can be found at: http://grass.fbk.eu/. There is a detailed api and usage guide, it is available for free download at: http://grass.fbk.eu/download/index.php. |
| | 12 | |
| | 13 | === Creating a DEM from ASTER data using ''asterdem.sh'' script === |
| | 14 | ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) is a sensor on the Terra satellite, ASTER is partly being used to obtain elevation maps. The ASTER version 1 have an approximate resolution of 30 metres, version 2 however has an approximate resolution of 15 metres. |