[R-sig-Geo] Generating heat map on google based on values

[Harsh Pensi]

Hello

Given a set of geographic coordinates and values associated with those
points, i want to interpolate data and generate heat map on google maps
with colors based on the values. Can you guide me to some R examples that
achieve this? I have to create this from scratch...the data I have is like
->
latitude ; longitude ; value ; color(i can provide the color input at these
points if required from another application).

I am trying to generate something like this ->
http://www.caliper.com/Graphics/maptitude-analysis-hot-spot-heat-mapping.jpg

I have looked at the examples in Rgooglemaps and ggplot2 packages but none
of them seem to give such an output.

Kindly guide me regarding this.

Thanks and Regards
Harsh

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