Geographic Information Systems

A tool for working with messy data, cleaning it, transforming it from one format into another, extending it with web services.

Color Brewer generates color swatches for sequential, diverging, and qualitative maps.

Cesium is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin. It uses WebGL for hardware-accelerated graphics, and is cross-platform, cross-browser, and tuned for dynamic-data visualization. Cesium is open source under the Apache 2.0 license. It is free for commercial and non-commercial use.

Texas A&M Geoservices offers geocoding that is the result of years of work. If you have a large-scale dataset, you may want to enlist this service.

A highly customized geocoding package that allows users to process geographic information for New York City.

Georeferencer from the David Rumsey collection at Stanford University is an application that allows users to overlay historic maps on modern maps or other historic maps. The overlaid maps reveal changes over time and enable map analysis and discovery.