Tagged As: Map Projections

Measuring and Visualizing Areal Distortion using Tissot’s Indicatrix

How to calculate Tissot’s Indicatrix, with an example showing areal distortion for the Wisconsin Transverse Mercator Projection.

Coordinate Reference Systems

Coordinate systems are used to accurately identify locations on the Earth’s surface, and are one of the fundamental building blocks that make modern Geographic Information Systems possible. This pages contains more information on coordinate reference systems commonly used in Wisconsin.