I am trying to use RgoogleMaps but when I try to run the script example from
"RgoogleMaps-intro.pdf -page 3" (see below) I get the following error
"Error en plot.xy(xy.coords(x, y), type = type, ...) "
I have tried to solve it but I am going crazy with this, because sometime in
the past I made it work
I would really appreciate some help
Thanks
Gabriel
***
#Define the markers:
mymarkers <- cbind.data.frame(lat = c(38.898648,38.889112, 38.880940),
lon = c(-77.037692, -77.050273, -77.03660), size = c('tiny','tiny','tiny'),
col = c('blue', 'green', 'red'), char = c('','',''));
#get the bounding box:
bb <- qbbox(lat = mymarkers[,"lat"], lon = mymarkers[,"lon"])
#download the map:
MyMap <- GetMap.bbox(bb$lonR, bb$latR, destfile = "DC.png", GRAYSCALE =T,
markers = mymarkers);
#determine the max zoom, so that all points fit on the plot
# (not necessary in this case):
zoom <- min(MaxZoom(latrange=bb$latR,lonrange=bb$lonR));
#plot:
png("OverlayTest.png",640,640);
tmp <- PlotOnStaticMap(MyMap,lat = mymarkers[,"lat"], lon = mymarkers[,"lon"],
cex=1.5,pch=20,col=c('blue', 'green', 'red'), add=F);
tmp <- PlotOnStaticMap(MyMap,lat = mymarkers[,"lat"], lon = mymarkers[,"lon"],
col=c('purple'), add=T, FUN = lines, lwd = 2)
dev.off()
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