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Thematic Mapping in Google Earth
By Ken Goulding posted on Thu, 2009-08-20 10:47 , 1225 reads, 2 commentsI'm not sure how useful this application is for our day-to-day planning purposes, but it does demonstrate an interesting use of Google Earth for thematic mapping.
What I really like is the ability to download multiple files and overlay them in Google Earth. The following example maps CO2 emissions per capita (bars) to GDP per capita (color ramp). Static images don't really do this visualization justice however, so I encourage those with Google Earth to try it for themselves.
There are also a number of other data sources from UNdata.
It takes a while to generate, but you can also choose to include a timeline that you can drag to see changes across a number of years. This can be impressive when used in the 3D "Prism" mode.
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Very interesting. Could you create a series of bars from, say, the locations of all land grant universities?
As far as I know, you wouldn't be able to use that kind of data with their tool. It only draws from UNData and a handful of other sources. However, its certainly possible to generate those kinds of visualizations for Google Earth from any appropriate data source (KML is pretty easy to encode - you could probably even generate something from Excel!).
One may also be able to use a 3D component in ArcMap to generate the output - which would probably be the most sensible work-flow (e.g. with this (untested) script I just googled: http://arcscripts.esri.com/details.asp?dbid=14273)
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