geographic terms


Spatial Analysis

Distance decay model showing the probability of Osama bin Laden's location. From a UCLA study, 2009.Distance decay model showing the probability of Osama bin Laden's location. From a UCLA study, 2009.

Distance Decay and Its Use in GIS

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.

GIS Learning

Geofencing

Geofencing

With all the location-based social media applications out there, it’s only logical that, in addition to being able to restrict access based on ones social groups (or circles), that geographic boundaries also be used as a restrictive parameter.  That capability is called a geofence, a virtual way to set the […]