Posts filed under: Blog

  • 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...
  • 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...
  • 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...
  • 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...
  • List of Canadian GIS Certificate
  Geographic Information System has become popular tools to convey the message and more people are taking this courses. Due to the advancement in internet...
  • Layout design output
It has been a while I have not written article on GIS and map production. Today I thought, I should write checklist while designing maps....
  • Layer Stacking and SLC correction of Landsat 7 images
Table of Contents: Using ERDAS Imagine SLC Correction: Process 1:  Layer stack Bands Process 2:  SLC correction Using QGIS 2.0 SLC Correction: Process 1:  Layer stack/merge...
  • Calculating the Vegetation Indices
Table of Contents: Step 1: Calculating Reflectance value from the Satellite data Step 2: Correcting the Reflectance value with sun angle Step 3: Calculating NDVI...