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OSMscale is an R package to easily handle and project
lat-long coordinates, download background maps and add a correct scale
bar to ‘OpenStreetMap’ plots in any map projection. There are some other
spatially related miscellaneous functions as well.
OSMscale is available on CRAN:
It relies on OpenStreetMap to do the
actual work, thus rjava must be available, see installation
tips.
# installation:
install.packages("OSMscale")
library(OSMscale)
# table with lat-long coordinates:
d <- read.table(sep=",", header=TRUE, text=
"lat, long
55.685143, 12.580008
52.514464, 13.350137
50.106452, 14.419989
48.847003, 2.337213
51.505364, -0.164752")
pointsMap(lat, long, data=d)
# projections:
png("ExampleMap.png", width=4, height=3, units="in", res=150)
map <- pointsMap(lat, long, data=d, type="nps", proj=putm(d$long), scale=FALSE)
scaleBar(map, abslen=500, y=0.8, cex=0.8)
lines(projectPoints(d$lat, d$long), col="blue", lwd=3)
points(projectPoints(52.386609, 4.877008, to=putm(zone=32)), cex=3, lwd=2, col="purple")
dev.off()
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.