If you use map() with the projection= option, then see ?mapproject, which allows you to project arbitrary (long/lat) points with the previously defined projection. Then you use points() to overlay them onto the map.
HTH, Ray Brownrigg On Tue, 16 Feb 2010, Shaun Langley wrote: > I have lat/lon coordinates in Michigan GeoRef that I need to re-project so > they can be shown over a Michigan county map generated from the Maps > library. I'm very confused as to how to do this. Can anyone help? > > Thanks, > > Shaun > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html and provide commented, minimal, > self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
