Class 7 - "Earth-Map Relations"

The Geographic Framework - over the next several classes, we will be looking at the 'geographic framework' that GIS data falls within. This framework includes but is not limited to geographic coordinate systems, approximations of the earth's size and shape (sphere, ellipsiod (spheriod), and geoid), datums, projected coordinate systems (map projections) scale and more! ESRI refers to all of this together as the Spatial Reference.


Map Projections by Carlos A. Furuti - GREAT RESOURCE!

About Coordinate Systems and Map Projections - ESRI

About Projected Coordinate Systems - ESRI

Georeferencing and Coordinate Systems - ESRI

Projections Basics the GIS Professional Needs to Know - ESRI

About the geoid, ellipsoid, spheroid and datum and how they are related - ESRI