HK1980GRID_TO_WGS84UTM: Convert HK1980GRID coordinates to WGS84UTM coordinates

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

Description

Convert HK1980GRID coordinates to WGS84UTM coordinates

Usage

HK1980GRID_TO_WGS84UTM(N, E)

Arguments

N	Numeric, Northern coordinate in meters
E	Numeric, Eastern coordinate in meters

Details

This function converts the HK1980GRID coordinates to HK80 geographical coordinates (latitude and longitude ) first, and then converts the later to HK80UTM coordinates, and eventually converts the HK80UTM coordinates to WGS84UTM.

Value

N	Northern coordinate in meters
E	Eastern coordinate in meters
zone	Zone

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

WGS84UTM_TO_HK1980GRID

Examples

options(digits = 15)
HK1980GRID_TO_WGS84UTM(820351.389, 832591.320)

#### $N
#### [1] 2471278.72371238
#### 
#### $E
#### [1] 205493.220852789
#### 
#### $zone
#### [1] 50

######################################
#### Answer from the online Conversion tool
#### http://www.geodetic.gov.hk/smo/tform/tform.aspx
#### 50Q 	2471279 	205494

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