Dear R-sig-Geo List Members,
How might I adjust a GE_SG object so that kmlOverlay() will produce a PNG that extends beyond the outermost points in a SpatialPoints object? When the outermost points are used to establish the extent of the grid, the symbols marking the location of the outermost points are cut off in the resulting image. I tried changing the bounding box, the width and height, the plot limits, and the setParUsrBB argument, but those changes did not produce the desired outcome. In most cases, those changes mis-placed the point locations when the KML file was opened in Google Earth. I posted a file that shows the problem (note that the top left, rightmost, and bottommost symbols are cut off): http://www.tc.umn.edu/~moor0554/BigTen_TEMP.pdf This code can be used to reproduce the problem: #################### windows(record=T) coords.alt <- matrix(c(40.10902, -88.22885, 39.16659, -86.5269, 41.65422, -91.53617, 42.2813, -83.73716, 42.73825, -84.48284, 44.97622, -93.23358, 42.04988, -87.6782, 40.00406, -83.0112, 40.79319, -77.86, 40.42994, -86.91141, 43.07581, -89.3976), nrow=11, ncol=2, byrow=T) data.alt <- data.frame(coords.alt) colnames(data.alt) <- c("lat", "long") for(i in c(1,2)) {data.alt[,i] <- as.numeric(data.alt[,i])} data.alt data <- data.alt library(maptools) coordinates(data) <- c("long","lat") proj4string(data) <- CRS("+proj=longlat") getwd() SG.big.ten <- GE_SpatialGrid(data) png("bigten.png", width=SG.big.ten$width, height=SG.big.ten$height, bg="transparent") par(mar=c(0,0,0,0), xaxs="i", yaxs="i") plot(data, xlim=SG.big.ten$xlim, ylim=SG.big.ten$ylim, setParUsrBB=TRUE, cex=3, pch=21, bg="red") dev.off() kmlOverlay(SG.big.ten, "bigten.kml", "bigten.png") plot(data, xlim=SG.big.ten$xlim, ylim=SG.big.ten$ylim, setParUsrBB=TRUE, cex=3, pch=21, bg="red") #################### Thank you for your assistance. Regards, Chris P.S. I'm using R 2.8.0 on Windows XP. -- Christopher Moore, M.P.P. Doctoral Student Quantitative Methods in Education University of Minnesota <mailto:moor0...@umn.edu> moor0...@umn.edu <http://www.tc.umn.edu/~moor0554/> http://www.tc.umn.edu/~moor0554/ [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
