Hello!
I'm having trouble making a map of terrain elevations.
I have a collection of (lon,lat, z) points. These points have regular
spacing (20km) when projected, but not in geographical coordinates.
So I project the data and make a SpatialGRidDataFrame object with sp and
rgdal packages.
How can I plot it with lon,lat axes? By costumizing the axes?
Is there a way to define the projection I am working on and do all the
work with lon,lat coordinates?
Thanks in advance,
Ana Rosa