coordinate reference system (CRS) Object for several proj4 character strings.
pll are taken directly from
pmap gets the projection string from map objects as returned by
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Vector of decimal longitude coordinates (East/West values).
Not needed of
UTM (Universal Transverse Mercator) zone, see e.g.
DEFAULT: UTM zone at mean of
for pmap: map object as returned by
sp::CRS objects for one of:
- UTM projection with given zone
- Open street map (and google) mercator projection
- Latitude Longitude projection
Berry Boessenkool, [email protected], Aug 2016
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