Marta. I would say that it is a problem with the coordinates of your data. If your original data are not in longlat you need to re-project them (with spTransform) before exporting to GE.
You can find an example with the meuse data set on these slides prepared by Roger Bivand: http://www.bias-project.org.uk/ASDARcourse/unit4_slides.pdf The original data are not in longlat so they are re-projected before being exported. Hope this helps, Virgilio El vie, 24-10-2008 a las 10:49 +0100, Marta Rufino escribió: > Dear list, > > I would like to start by acknowledging the wonderful work of this > support list :-) > I have a question, which should be prety dummy,... but I was looking > around in the net, in reports, etc. and could not sort it out. > > I am trying to export a image plot to google earth. I manage to do it > with points data... ok. but when I do it with the images, they simply > go to Fiji (which I am sure it is a nice place... but a bit far from the > Algarve, where it should be). > Even the example given in the help file, the image goes to the same > place. What am I doing wrong? > > > require(maptools); require(rgdal) > # This is the example, in the file > opt_exask <- options(example.ask=FALSE) > qk <- SpatialPointsDataFrame(quakes[, c(2:1)], quakes) > proj4string(qk) <- CRS("+proj=longlat") > tf <- tempfile() > SGqk <- GE_SpatialGrid(qk) > png(file=paste(tf, ".png", sep=""), width=SGqk$width, > height=SGqk$height, bg="transparent") > par(mar=c(0,0,0,0), xaxs="i", yaxs="i") > plot(qk, xlim=SGqk$xlim, ylim=SGqk$ylim, setParUsrBB=TRUE) > dev.off() > kmlOverlay(SGqk, paste(tf, ".kml", sep=""), paste(tf, ".png", sep="")) > > # than the files produced are in > tf() > > I go to the file, pick it the two of them and drag it in google earth... > and there they are, in Fiji!!! I am sure it is silly, but it is my first > steps in googleearth--R :-( > If I open it through google earth, it is the same... > > A second doubt I have is if we can set apriori, in R the markers > projected in google earth... how do I do if instead of the pins, I want > a ball? Do I have to change one by one? > > > Thank you very much in advance, > Best wishes, > Marta > > I am in windows, R 2.7.1, maptools, version 0.7-15, 2008-08-14... > GDAL 1.5.2, released 2008/05/29 > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/r-sig-geo _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo