Google Mapplet for creating Piecharts

Creating charts on maps have been available on desktop mapping software such as MapInfo for many years but not for GeoMedia, though there was some an add-on GeoMedia Business Analysis software from Europe several years ago.I thought this would be an interesting thing to do on the Internet ala Cloud Computing. After reading (skimming) through the Google Maps API and Google Visualization API, I thought that it was possible to do and so I set out to write a Charting Mapplet in my free time. I have completed it as can be seen in the screen shot below.

This Mapplet will create pie charts on Google Maps from text files formatted as comma separated values (CSV). The CSV data must have a header row, geographic latitude and longitude columns to point to the locations to place the charts on. The charts created can be clicked on to show the values. The charts can also be dragged and moved to a different location on the map if necessary.

If you want to take this for a spin, click on this link http://dominoc925-pages.appspot.com/mapplets/piechart.html.