Caitlin Dempsey
Caitlin Dempsey has been the editor of GIS Lounge (http://gislounge.com) since 2001. Prior to that, she was the GIS Guide at About.com. More about Caitlin Dempsey and GIS Lounge on this page: http://gislounge.com/about-this-site/
Caitlin Dempsey's Latest Posts
Spatial Analysis in GIS
Geographic information systems uses spatial analysis in order to understand geographic questions. Listed here are geographic analysis commonly performed in GIS.
GIS Survey: GIS Certification
Do you have a GIS certification such as a GISP or an Esri technical certification? Fill out the survey below to explain why you do or do not hold a certification.
Geographic Coordinate System
Map projections allow us to convert from sphere to planar (flat) representation. Geographic coordinate systems allow for the measurements of distances and to determine direction. Except for the Geographic Grid all coordinate systems are based on some form of map projection. Coordinates In a coordinate system, the X value given first and referred to as [...]
Exploring Map Projections
Created using D3, Map Projection Transitions provides an excellent way to visualize a wide range of map projections. The page was created by Jason Davies, a freelance data visualization consultant. Map projection visualizations offers the user a glimpse at what forty-one different projections look like. Users can select one of the map projections from the drop [...]
Google Maps Finds Old Treasure Map
On September 16, 2012, the intrepid Google Maps Street View Team found a chest containing a old maps and journals off the coast of Madagascar. Apparently these maps belonged to the infamous pirate, William “Captain” Kidd. Right before he was executed, Kidd yelled out, “Two hundred bars of gold and rich dollars manifold, concealed in realms [...]