All posts by: admin

  • gis components
Components of GIS: Geographic Information System (GIS) is a computer system build to capture, store, manipulate, analyze, manage and display all kinds of spatial or...
  • gpsvsdgps
GPS: GPS known as Global Positioning System is a collection of number of satellites in the space sending the precise location details in the space...
  • world
Heat Map are quite popular in GIS world which can be produced in  various GIS software, I have written a tutorial on How to Create...
  • WGS84 vs NAD83
Hello GIS Grinder, today going to write on differences between WGS84 and NAD83. Both the coordinate system differ in some way, I have listed 10...
  • active vs passive
There are two main types of sensors used in remote sensing technology, active sensors and passive sensors. Difference between these two is quite small, however,...
Almost 70 percentage of the earth surface is covered by the vegetation and it is the first to encounter the energy (sun). Vegetation is important...
  • 3d image
  In GIS world 3D means that has X, Y and Z coordinates. Z coordinate is used to draw height. 3D map helps better understanding...
  • Free Satellite Data
  Landsat Data: One of the most popular free satellite data is Landsat data. By the effort from NASA and USGS, Landsat 1 was lunched...
  • DEM data
Digital Elevation Model (DEM) is a raster image that holds z values, it is used widely during the analysis process where surface height value are...
  • Landsat Application
1. Africa Content Environmental Change: Landsat data was heavily used to create Africa Environmental change Atlas Map that includes map of  glacier melting, loss of...