UTM.ll {GEOmap}R Documentation

Map projection

Description

UTM Map projection parameters supplied and X-Y, return the LAT-LON values, WGS-84

Usage

UTM.ll(x , y , PROJ.DATA)
utm.wgs84.ll(x , y , PROJ.DATA)

Arguments

x

x

y

y

PROJ.DATA

list of projection parameters

Value

List

phi

Latitude-coordinate

lam

Longitude-coordinate

Note

When calling the conversion from LL to XY or vice versa, convert the lon to 0 to 360. Use RPMG::fmod for this conversion. This may be rectified in future revisions.

Author(s)

Jonathan M. Lees<jonathan.lees.edu>

References

Snyder

See Also

setPROJ, GLOB.XY, projtype, utm.sphr.ll, UTMzone, plotUTM, utmbox, DATUMinfo

Examples

lat = 40.5
lon = -73.50
LON = RPMG::fmod(lon, 360)

uzone = UTMzone(lat, lon)
lon0 = uzone$CEN[2]
####  clark1866
wproj8 = setPROJ(type = 8, LAT0 = 0 , LON0 = lon0,  IDATUM=8)
uu = UTM.xy(lat, LON  , wproj8)
 UTM.ll(uu$x, uu$y ,wproj8)

###  wgs84
wproj1 = setPROJ(type = 8, LAT0 = 0 , LON0 = lon0  , IDATUM=1)
uu = UTM.xy(lat,LON  , wproj1)

 UTM.ll(uu$x, uu$y ,wproj1)
[Package GEOmap version 2.4-0 Index]