How Map Projections Work
The best way to represent the Earth is with a globe. But map projections can be awfully useful too. Find out why cartographers use map projections in GIS.
Articles
What is Bit Depth for Satellite Data (and Images)
Bit depth is the amount of detail in each pixel expressed in units of bits. 1-bit rasters contain 2 values while 8-bit rasters range from 0-255
33 Map Elements to Include in Cartographic Design
This guide is like your compass – these 33 mapping tips will guide you in the right direction and show you how to create stunning cartographic maps.
The Remarkable History of GIS
Maps help us get to places. They help us make decisions. Maps have changed how we think about location. But where did it begin? We study the history of GIS.
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
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.