Point pattern analysis | Kernel estimation and Google Maps

2009/2/28 Michel Barbosa <cicaboo at gmail.com>:

Dear list,

I'm having troubles with matching the Google Map's bounding box with the
window of plot.ppp (spatstat). My coordinates are in longitude / latitude.
Ultimately, I'd like to have the bounding box of my Google Maps map to be
equal to the rectangle (window) in R. I've seen suggestions that UTM would
be a better way to go. Could you provide me with tips / ideas to tackle this
problem? My intent is to have the Kernel Estimation png overlayed on my
Google Maps map.

I've read this about ten times to try and figure out what you want to do!

 Do you want to generate a grid in R and overlay it on Google Maps,
using the Google Maps API? And then is the problem because of the axes
and labels on the png produced from the R graphics device?

 In which case you are probably better off using one of the functions
in the rgdal package to create a georeferenced raster file - that has
no axes or titles etc.

Google Maps uses lat-long with the EPSG:4326 coordinate system, so if
your data is in lat-long with the EPSG:4326 coordinate system then you
don't need any transformation.

Barry