[R-sig-Geo] overplotting on png map tile in R

[Gabor Grothendieck]

The rgdal package can read png images.  See:
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/94605.html

On Sun, Mar 8, 2009 at 12:32 PM, Markus Loecher
<markus.loecher at gmail.com> wrote:
> Dear R geo wizards,
> while I am very happy with the kmloverlay() function from the maptools
> package to create overlays from R in Google Earth, I often would like
> to perform an even simpler task.
> Given a png image with a known lat/lon bounding box, such as a map
> tile or some other geographically aligned image, I would like to
> (i)  load the image into R,
> (ii) plot the image, and
> (iii) overlay e.g. lat/lon referenced points on top of this image
>
> The points should be plotted with respect to the coordinates of the image.
>
> Is this possible at all ?
>
> Thanks !
>
> Markus
>
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