Scalebar {SDMTools} | R Documentation |
Scalebar
adds a distance scalebar onto a projected
map. It is not appropriate for geographic projections.
Scalebar(x, y, distance, unit = "km", scale = 1, t.cex = 0.8)
x |
the x-axis position for the lower left corner of the bar |
y |
the x-axis position for the lower left corner of the bar |
distance |
the distance for which the scale bar should represent |
unit |
the units to report as the scaling |
scale |
the scaling factor to rescale the distance to a different unit. e.g., if your map is in m and want the scalebar to be in km, use a scale of 0.01 |
t.cex |
the scaling of the font size to be used for the scalebar |
nothing is returned, simply a scalebar is added to a plot.
Jeremy VanDerWal jjvanderwal@gmail.com
#create a simple object of class 'asc' tasc = as.asc(matrix(1:50,nr=50,nc=50)); print(tasc) #plot the image image(tasc,axes=FALSE,ann=FALSE) #add a distance scalebar Scalebar(x=5,y=5,distance=20) #show values in km Scalebar(x=5,y=10,distance=20,unit='m',scale=1000) #show values in meters