GeoSpatial Knowledge Hive

Visualize View From a Particular Point Using GIS  How many places are visible from your point, e.g. you want to construct a house how many places are visible from that sight.e.g. you want to practice shooting , how many visible spots can be shot from location (A Military Application)...likewise many other interesting applications can be performed using viewshed analysis. Image by  Tim Hill  from  Pixabay Performing ViewShed Analysis   Use any GIS software, e.g. i will use ArcMap, as a first step get data set of your area. DEM (Digital Elevation Model) that gives topographic information (lat, long, height) freely available online. A shapefile of your point of sight, which you can create it easily in GIS software Example :   plne , an elevation grid; and lookouts.shp , a lookout location shapefile. Step-1 : Start ArcMap , Add data  Search for Hillshade  and  specify  files plne or your grid file  Hillshade Tool...

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/

T  his tutorial explains steps to generate 3D surface for visualization and analysis. Image by  lijunzhuang  from  Pixabay         Start ArcScene from start menu.       Add DEM layers        Go to properties        Choose Base Heights tab.       Click   Obtain heights for layer from surface       Click Ok  Image Source: 3D visualization