Convert HK80UTM coordinates to WGS84UTM coordinates

Convert HK80UTM coordinates to WGS84UTM coordinates

HK80UTM_TO_WGS84UTM(N, E, zone = c(49, 50))

Arguments

N	Numeric, Northern coordinate in meters.
E	Numeric, Eastern coordinate in meters.
zone	zone, UTM zone number, either 49 or 50.

Details

This function uses the simplified relationship described on page B6 to convert HK80UTM to WGS84UTM coordinates.

Value

N

Northern coordinate in meters

E

Eastern coordinate in meters

zone

UTM zone, either 49 or 50

References

Survey & Mapping Office Lands Department, Hong Kong Government (1995). Explanatory Notes on Geodetic Datums in Hong Kong, available at: http://www.geodetic.gov.hk/smo/gsi/data/pdf/explanatorynotes.pdf

Author

Jinlong Zhang

Note

The coordinates should be within the range of Hong Kong. Providing coordinates outside Hong Kong will lead to wrong results.

See also

WGS84UTM_TO_HK80UTM

Examples

#### This function was not tested since similar 
#### conversion service is not available at 
#### http://www.geodetic.gov.hk/smo/tform/tform.aspx
options(digits = 15)
HK80UTM_TO_WGS84UTM(N = 2471279, E = 205494, zone = 50)
#>         N      E zone
#> 1 2471074 205754   50