2009/2/28 Michel Barbosa <[email protected]>: > 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 _______________________________________________ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
