ortho.proj {GEOmap} | R Documentation |
Orthogonal Map Projection
Description
Orthogonal Map Projection
Usage
ortho.proj(lat, lon, lon0, lat1, R)
Arguments
lat |
latitude, degrees |
lon |
longitude, degrees |
lon0 |
view origin longitude, degrees |
lat1 |
view origin latitude, degrees |
R |
Radius of sphere, default=1 |
Details
Assumes spherical globe. This function is not part of the normal GEOmap plotting routines.
Value
list
x |
x, coordinate in units of R |
y |
y, coordinate in units of R |
Author(s)
Jonathan M. Lees<jonathan.lees@unc.edu>
References
Snyder, John P., Map Projections- a working manual, USGS, Professional Paper, 1987.
See Also
GLOBE.ORTH, setPROJ, projtype
Examples
olat = 0
olon = 0
tlat = 23
tlon = 30
R = 1
ortho.proj(tlat, tlon, olon, olat, R)
[Package GEOmap version 2.5-11 Index]