I'm using the cartography package in R to plot a choropleth map. However, I have a problem placing the legend, which can be placed by means of the legend.pos argument, but which always overlaps with my map. The documentation says:
legend.pos : position of the legend, one of "topleft", "top", "topright", "right", "bottomright", "bottom", "bottomleft", "left" or a vector of two coordinates in map units (c(x, y)). If legend.pos is "n" then the legend is not plotted.
(Source: https://cran.r-project.org/web/packages/cartography/cartography.pdf)
Using "right", "bottomright" etc, the legend still overlaps my map; thus, I'd like to use the coordinates version. However, I tried already lots of different combinations, but the legend does not appear in the map anymore.
My question is: How to understand "coordinates in map units"? How can I find the right coordinates to that the legend becomes visible?
Here is my code; as you can see, I use the standard "nuts0" map.
choroLayer(spdf = nuts0.spdf, df = nuts0.df, var = "cdp",
breaks=seq(from=0, to=240, by=40),
col = farb,
colNA="grey70",
border = "grey40", lwd = 0.5,
legend.pos = "bottomright",
legend.title.txt = "No. companies",
add = F)
proj4string(spdf)to get your crs. – RoperMaps Dec 8 '17 at 15:46