Nothing
library('mapmisc')
data('netherlands')
nldCities = unwrap(nldCities)
x=nldCities
xbox = as.polygons(ext(nldCities), crs = crs(nldCities))
bob=function(angle, ...){
y = project(x, omerc(x, angle, ellipse=FALSE, ...))
nld2 = project(xbox, crs(y))
map.new(nld2)
abline(v=0, col='grey')
abline(h=0, col='grey')
plot(nld2,add=TRUE, lwd=2, lty=3)
plot(ext(y), add=TRUE, col='orange')
plot(y,cex=0.2, col='red',add=TRUE)
text(y,labels=y$name, cex=0.5, col=col2html('blue',0.4))
mtext(paste(angle,collapse=' '),side=3,outer=FALSE,line=-1)
scaleBar(y,'topright')
return(invisible(crs(y)))
}
if(!interactive()) pdf("omerc.pdf")
par(mfrow=c(3,3))
bob(0)
bob(89)
bob(45)
bob(-45)
bob(180-45)
bob(-180-45, post=-45)
bob(45, post='north')
bob(45, post='wide')
bob(45, post='tall')
par(mfrow=c(3,2))
bob((-10):10)
bob(seq(-170,-190))
bob((-10):10, post='north')
bob((-10):10, post='wide')
bob((-10):10, post='long')
bob((-10):10, post=90)
N = 12
somePoints = vect(
cbind(runif(N,-5,40), runif(N,40,70)),
atts=data.frame(name=1:N),
crs=crsLL
)
x=somePoints
xbox = as.polygons(ext(somePoints), crs(somePoints))
par(mfrow=c(3,2))
bob((-10):10, preserve=x, post=10)
bob((-10):10, preserve=x, post='none')
bob(seq(-170,-190), preserve=x)
scaleBar(bob((-10):10, preserve=x, post='north'), c(0,0), seg.len=0)
scaleBar(bob((-10):10, preserve=x, post='tall'), c(0,0), seg.len=0)
scaleBar(bob((-10):10, preserve=x, post='wide'), c(0,0), seg.len=0)
if(!interactive()) dev.off()
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