ortho.proj: Orthogonal Map Projection

View source: R/ortho.proj.R

ortho.projR 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)



GEOmap documentation built on Sept. 1, 2023, 5:09 p.m.