geographic concepts

Laptop with QGIS, a desktop GIS software program

GIS 101: Learn About GIS

Caitlin Dempsey

This GIS 101 page is the launch page for accessing information about GIS and geospatial technologies on GIS Lounge.

Basic Geographic Concepts

Caitlin Dempsey

Listed here are the basic geographic concepts for geographic understanding and inquiry.  When looking at the geography of an area, ...

An illustrative example of distance decay using blue points and yellow arrows.

Distance Decay and Its Use in GIS

Caitlin Dempsey

Distance decay is a phenomenon observed between locations or ethnic groups- the further apart they are, the less likely it is that they will interact very much. Distance decay theory in GIS can be used for other purposes such as the effects of time and distance on public transportation ridership, crime analysis, and health care.

What is Ethno Mapping?

Caitlin Dempsey

Maps aren’t just intended for navigation. Though most people think of maps in terms of what kind of physical land ...