[R] Is there a package for digitizing or reading jpegs, ets. in R?
ihaka at stat.auckland.ac.nz
Sat Aug 16 06:27:05 CEST 2003
Peter Hovmand wrote:
> I'm interested in digitizing some scanned time series, and looking for
> a solution that is easy and flexible. I thought I might be able to use
> R's locator() if I could get the image into a device. I noticed that
> there are some packages like (rimage), but it (a) doesn't seem to be
> available for the Windows version and forces me to upgrade a bunch of
> libraries for my linux system. It seems like someone should have
> something for digitizing maps and/or there something very obvious that
> I am missing here. Any suggestions would be appreciated!
I have used "xfig" with some success. You suck your image into xfig and
give it a large depth. Next you draw contours and scales over the top
of the image. The xfig coordinates can be converted to appropriate
coordinates with a linear transformation. I have done a number of
coastlines and topographic maps this way.
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