NAD83 – We’re Not in Kansas Anymore
North American Datum of 1983 (NAD83) is 2-meters from geocentric and uses thousands of monuments with triangulation to create a reference frame for Earth
Author: GISGeography
We help you learn Geographic Information Systems and remote sensing
Image Compression and Encoding for Raster Data
Deploying efficient raster GIS compression techniques means reducing storage space. It can save money, time and also help network performance.
World Geodetic System (WGS84)
The World Geodetic System 1984 (WGS84) is a spatial reference system of GPS satellites with an error of less than 2 cm to the center of Earth.
7 Geoprocessing Tools Every GIS Analyst Should Know
So you want to geoprocess like a GIS guru, do you? From clipping to buffering, you will learn the basic GIS processing tools along with uses & applications
Vector vs Raster in GIS: What’s the Difference?
The main spatial data types are vectors and rasters. Rasters have grid cells while vectors are points , lines and polygons consisting of vertices & paths.
What is the Difference Between Geomatics and GIS?
In the world of geography, two disciplines are often mistaken as the same one. But Geomatics and Geographic Information Systems are different.
Pleiades Satellite Constellation: Spot the Detail
The agile Pleiades satellite constellation is comprised of Pleiades 1A and 1B. They offer dynamic image acquisition at 50cm panchromatic & 2m multispectral.
Satellite Pour l’Observation de la Terre (SPOT)
SPOT-1 (Satellite Pour l’Observation de la Terre) was a French commercial satellite launched in 1986 initiated by the French Space Agency (CNES).
Global Forest Maps to See the Forest for the Trees
Satellite and mapping technologies tell a story of our trees and forests. These 4 global forest maps will help you start seeing the forest for the trees.
A Complete Guide to LiDAR: Light Detection and Ranging
How would you like to wave your magic wand and find out how far everything is away from you? No magic wands necessary. This is how LiDAR works.