Convert WGS84GEO coordinates to HK80UTM coordinates

Convert WGS84GEO coordinates to HK80UTM coordinates

WGS84GEO_TO_HK80UTM(latitude, longitude)

Arguments

latitude	latitude in decimal degrees
longitude	longitude in decimal degrees

Details

This function first converts the WGS84GEO coordinates to WGS84UTM, and then converts the corresponding WGS84UTM coordinates to HK80UTM.

Value

N

Northern coordinate in meters

E

Eastern coordinate in meters

zone

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_WGS84GEO

Examples

#### The similar conversion is not available at 
#### http://www.geodetic.gov.hk/smo/tform/tform.aspx
#### Therefore it the output has not been verified.
options(digits = 15)
WGS84GEO_TO_HK80UTM(22.322172084, 114.141187917)
#>                  N                E zone
#> 1 2471482.40720947 205230.486891282   50