Convert WGS84UTM coordinates TO HK80UTM coordinates

Convert WGS84UTM coordinates TO HK80UTM coordinates

WGS84UTM_TO_HK80UTM(N, E, zone = c(49, 50))

Arguments

N	Numeric, Northern coordinate in meter
E	Numeric, Eastern coordinate in meter
zone	zone, numeric, either 49 or 50

Details

This functions uses a simplified relationship to convert the coordinates. If zone is 49, res.N = N + 195, res.E = E - 245; if zone is 50, res.N = N + 205, res.E = E - 260

Value

N

Northern coordinates in meters

E

Eastern coordinates in meters

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

HK80UTM_TO_WGS84UTM

Examples

#### The similar conversion is not available at 
#### http://www.geodetic.gov.hk/smo/tform/tform.aspx
options(digits = 15)
WGS84UTM_TO_HK80UTM(2471279, 205494, zone = 50)
#>         N      E zone
#> 1 2471484 205234   50