GeoSpatial Knowledge Hive

Lidar Data is available free of cost  How it works: User generated data sets that are registered  Good Point:  Free LiDar data   Open Topograhy Tools and Softwares  Point2Grid Opal ToolKit myHadoop For more research about Open topography visit:   http://www.opentopography.org/

Laser Scanning                                                 Laser surveying, or 3D laser scanning is very simple in principle. A laser scanner is mounted on a tripod next to the area to be scanned. The scanner fires a laser and measures the time it takes for the laser to be reflected back, with which it can calculate the distance from the reflected point. The scanner systematically sweeps the room with these measurements until it has a complete picture of the 3-D space around it. This collection of measurements is called a point cloud, and is the data set from which we can extract valuable information and 3-D models. Image by  Defence-Imagery  from  Pixabay   Types: Aerial (or airborne) Terrestrial, mobile ...