Hello R Users,
I am trying to create a topographical map of Argentina with data points showing the location of 5 species. I first created a map using map() with points using latitude and longitude data for all 5 species as follows: library(maps) # Latitude / longitude coordinates of the 5 species: lat<-c(-44.000, -43.000, -26.000, -33.000, -36.000) lon<-c(-68.000, -70.000, -67.000, -61.000, -68.000) map(regions='AR', xlim=c(-75, -53), ylim=c(-56, -20), las=1) map.axes() points(lon, lat, pch=20, col="gray50", cex=1.8) This map does not give me the topographical relief I wanted, so I tried using the following code, which first downloads elevation information from NOAA and then creates a topo map of southern South American that includes Argentina: library(geomapdata) library(GEOmap) data <- file(description = "http://www.ngdc.noaa.gov/mgg/global/relief/ETOPO5/TOPO/ETOPO5/ETOPO5.DAT";, open = "rb", blocking = TRUE, encoding = getOption("encoding"), raw = FALSE) data(ETOPO5) PLOC=list(LON=c(-80.000,-50.000),LAT=c(-56.000,-20.000), x=c(-80.000,-50.000), y=c(-56.000,-20.000) ) PROJ = setPROJ(type=2, LAT0=mean(PLOC$y) , LON0=mean(PLOC$x) ) COLS = settopocol() JMAT = GEOTOPO(ETOPO5, PLOC, PROJ, COLS$calcol, nx=1000, ny=1000, nb=8, mb=8, hb=12, PLOT=TRUE) I have attempted to add the 5 species points to this second map in a number of different ways, but I haven't been able to figure it out. In addition, I can not find documentation for how to do this in the GEOmap pdf or online. Can someone please help me add these lat / long points to the topo map? Thank you in advance for your time and help. K. Sheldon -- View this message in context: http://r.789695.n4.nabble.com/Adding-points-to-a-topo-map-tp4687330.html Sent from the R help mailing list archive at Nabble.com. [[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.
