when you post this can you please remove the tiff file? my supervisor doesn't want me to let it out. sorry!
On Thu, Jul 16, 2009 at 4:02 PM, Mehdi Khan <mwk...@ucdavis.edu> wrote: > I imported the attached tiff file and converted the coordinate system to > long lat and graphed it: > > californiatiff<- readGDAL("california1.tif") > proj4string(californiatiff) > > rasterprojection <- spTransform(californiatiff, CRS("+proj=longlat") > > however, when using the plot command for rasterprojection, I get a blob. I > can see the outline of the state of california and nevada, but rather than > being able to see the geographic features, it is just a monocolor blob. My > suspicion is that since it is a list of coordinates and another column that > contains attributes, I need to turn it into a polygon. I've tried the > following codes but none work: > > > rasterprojection2<-SpatialPolygons(rasterprojection) > Error in is.vector(X) : > trying to get slot "Polygons" from an object of a basic class ("integer") > with no slots > > rasterprojection2<- Polygons(rasterprojection) > Error in as.vector(x, "list") : > cannot coerce type 'S4' to vector of type 'list' > > Essentially, all I need to do is to connect the coordinates into polygons. > What am I doing wrong? > > Thank you! > [[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.