October 2015 - GIS Geography

Maps for the Dead: A List of the Best Halloween Maps

5 Halloween Maps. Almost all cultures recognize spirits aka the dead. So we bring these 5 maps for the dead to get you in the spirit of Halloween.

What are Map Projections? (And Why They Are Deceiving to the Human Eye)

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.

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: A ‘How to’ Guide to Map Making

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 the spatial reference system of GPS satellites with an error of less than 2 centimeters 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