WGS84UTM_TO_HK80UTM: Convert WGS84UTM coordinates TO HK80UTM coordinates

In helixcn/HK80: Conversion Tools for HK80 Geographical Coordinate System

Description

Convert WGS84UTM coordinates TO HK80UTM coordinates

Usage

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

Note

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

Author(s)

Jinlong Zhang

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

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)

helixcn/HK80 documentation built on Aug. 13, 2021, 3:21 a.m.