Position of colorbar and color vs label breaks R raster

classic Classic list List threaded Threaded
1 message Options
Reply | Threaded
Open this post in threaded view

Position of colorbar and color vs label breaks R raster

R-sig-geo mailing list
Dear All,
I have a raster layer (lr) with the following attributes:


class       : RasterLayer

dimensions  : 137, 229, 31373  (nrow, ncol, ncell)
resolution  : 0.136, 0.0808  (x, y)
extent      : -120.0072, -88.8632, 48.95328, 60.02288  (xmin, xmax, ymin, ymax)
coord. ref. : +proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs
data source : in memory
names       : myfile100
values      : 106.6673, 172.4463  (min, max)

I write the raster to a directory like this:
writeRaster(r, file="myfile100.tif", format="GTiff", overwrite=TRUE)

lr = raster("myfile100.tif")
Long=c(-120.0072, -88.8632)
Lat=c(48.95328, 60.02288)
brks <- seq(minValue(lr), maxValue(lr), by=10)
nb <- length(brks)-1
colors<-c("darkred", "red3","orange","gold1", "yellow", "lightskyblue","steelblue3", "royalblue3",

Long=c(-120.0072, -88.8632)
Lat=c(48.95328, 60.02288)# plot the raster
plot(Long, Lat, type="n",axes=FALSE,xlab="",ylab="")
plot(lr,add=TRUE,legend=F,axes=FALSE,lab.breaks=brks, zlim=c(105,175),
main='first',col=colorRampPalette(c("darkred", "red3","orange","gold1", "yellow", "lightskyblue","steelblue3", "royalblue3",
"darkblue","darkblue"))(30))# change number of colors
1) Problem: Legend falls on the raster image and not out of the box. How can I change the postion of the raster? I found this answer but it just does not solve the problem.
r.range <- c(minValue(lr), maxValue(lr))
plot(lr, legend.only=TRUE,legend.width=1.4,
axis.args=list(at=seq(r.range[1], r.range[2], 10),
labels=seq(r.range[1], r.range[2], 10),
legend.args=list(text='Elevation (m)', side=4, font=2, line=2.5, cex=0.8))

2) How can I set set legend (colorbar) label breaks to match color breaks?

I will send my raster upon request since I could not make a good reproducible example enough to illustrate the problem.

Many thanks,

R-sig-Geo mailing list
[hidden email]