PlotArrowsOnStaticMap function

plots arrows or segments on map

This function plots/overlays arrows or segments on a map.

PlotArrowsOnStaticMap(MyMap, lat0, lon0, lat1 = lat0, 
    lon1 = lon0, TrueProj = TRUE, FUN = arrows, add = FALSE, 
    verbose = 0, ...)

Arguments

• MyMap: map image returned from e.g. GetMap()
• lat0: latitude valuesof points FROM which to draw.
• lon0: longitude values of points FROM which to draw.
• lat1: latitude valuesof points TO which to draw.
• lon1: longitude values of points TO which to draw.
• TrueProj: set to FALSE if you are willing to accept some degree of inaccuracy in the mapping. In that case, the coordinates of the image are in lat/lon and the user can simply overly points/lines/axis without worrying about projections
• FUN: , plotting function to use for overlay; typical choices would be arrows and segments
• add: start a new plot or add to an existing
• verbose: level of verbosity
• ...: further arguments to be passed to FUN

Returns

return value of FUN

Author(s)

Markus Loecher

See Also

PlotOnStaticMap arrows

Examples

if (0){
        MyMap <- GetMap(center=c(lat=40.7,lon=-74), zoom=11)
        PlotArrowsOnStaticMap(MyMap, lat0=40.69, lon0=-73.9, lat1=40.71, lon1=-74.1, col = 'red')   
}