April, 2008


GIS Software

Online Mortgage Maps

Online Mortgage Maps

The Federal Reserve has released dynamic maps showing subprime and alt-A mortgage loan information across the United States.  While the concept is very interesting, it seems that the Flash application was developed with little understanding of cartographic principals.  The chloropleth maps are available at the ZIP Code level but the […]

GIS Learning

Privacy in GIS Issues

Privacy in GIS Issues

The increase usage of GIS and associated geospatial technologies has brought with it a rise in public concern over privacy. The proliferation of easily accessible public geographic information via the web is one of the reasons.  The availability of not only aerial and satellite imagery but also street level imagery […]

GIS Learning

Twitter in 3D

Twitter in 3D

Now you can see all your Twitter messages mapped across a globe. TwittEarth is a Flash application that pinpoints Twitter messages as they pop up around the world. The globe spins in response to new geolocated Twitter messages every 10 seconds. Either login in to post your own messages or […]

GIS Data

CO2 Emission Maps and Data

CO2 Emission Maps and Data

Purdue University has announced the availability of high resolution CO2 emission maps and data for the United States. The Vulcan Project details carbon dioxide emissions at a level of detail more than 100 times previously available datasets. Additionally, CO2 emissions were calculated in 10 kilometer grids based on a method […]