This mapplet will help you to create pie charts on Google Maps from Comma Separated Values (CSV) data. The input CSV data for charting has to be formatted as follows:

where

• the first row must be a header row of the column titles - each column corresponds to a slice of the pie chart; subsequent rows are data rows.
• two of the columns must be geographical latitude and longitude coordinates in decimal degrees representing the origin of the chart i.e. the pie chart center.
• the columns for charting must contain numerical values e.g. 123.567
• each column must be delimited by a separator character e.g. comma, tab, space, or semi-colon.

An example CSV file:

latitude,longitude,car,bicycle,truck
35.1738083,-113.4667968,10,20,30
32.7688004,-98.7890625,30,50,90
43.8345267,-78.0468750,80,190,10

The resultant chart example: