GIS Learning



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 […]

GIS Data

Blue pictures are by locals. Red pictures are by tourists. Yellow pictures might be by either.

Mapping Out Geotagged Photos

Eric Fischer, a photographer, has done his own analysis of geotagged maps on Flickr with his The Geotaggers’ World Atlas.  Over fifty major cities are represented in his set.  On top of OpenStreet base maps, Fischer used perl scripts to identify and plot the clusters of locations.  The lines show the […]