Nothing
PlotBgMap <-
function( traj, ... ) {
# extract the projection from the sp object
hySplitProj <- CRS(proj4string(traj))
# apply the projection to the background map
canada <- spTransform(opentraj::worldmap, hySplitProj)
# plot the map
plot(opentraj::worldmap, border="white", col="lightgrey", ... )
}
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