ortho.proj | R Documentation |
Orthogonal Map Projection
ortho.proj(lat, lon, lon0, lat1, R)
lat |
latitude, degrees |
lon |
longitude, degrees |
lon0 |
view origin longitude, degrees |
lat1 |
view origin latitude, degrees |
R |
Radius of sphere, default=1 |
Assumes spherical globe. This function is not part of the normal GEOmap plotting routines.
list
x |
x, coordinate in units of R |
y |
y, coordinate in units of R |
Jonathan M. Lees<jonathan.lees@unc.edu>
Snyder, John P., Map Projections- a working manual, USGS, Professional Paper, 1987.
GLOBE.ORTH, setPROJ, projtype
olat = 0
olon = 0
tlat = 23
tlon = 30
R = 1
ortho.proj(tlat, tlon, olon, olat, R)
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