• 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...
  • SAGA GIS georefrencing
Google Earth is a popular software to view world satellite image, sometime you might want to add it's image into the SAGA GIS software and...
  • Remote Sensing Applications
Satellites have played a huge role in development of many technologies such as world mapping, GPS, etc. However, their applications are not limited as imaging...
  • python arcgis
Python scripting has become popular with the ArcGIS software. ArcGIS adopted it after version 9.0. Python script can be used in many parts within ArcGIS;...
  • google and bing
I wrote a tutorial about how to do geocoding with Microsoft Excel and Google Maps but saw few comments about the limitation which is 2500...