The David Rumsey Historical Map Collection has over 11,000 maps online. The collection focuses on rare 18th and 19th century North and South America maps and other cartographic materials.

The USGS Digital Elevation Model (DEM) data files are digital representations of cartographic information in a raster form. DEMs consist of a sampled array of elevations for a number of ground positions at regularly spaced intervals.

“But where is location-based technology leading us in the larger sense? And where’s the business model beef? The first Where 2.0 Conference brings together the people, projects, and issues leading the charge into this technological frontier.”

software overview on Free Geographic Information Systems

Dictionary of abbreviations and acronyms in geographic information systems, cartography and remote sensing.

“As a surveyor, you have vast opportunities. You can map the world’s terrain. Explore new oil sources. Investigate crime scenes. Take charge as a CEO. Appear in court as an expert witness…” […]