HK80GEO_TO_WGS84GEO: Convert HK80GEO coordinates to WGS84GEO coordinates

Description Usage Arguments Details Value Note Author(s) References See Also Examples

View source: R/HK80GEO_TO_WGS84GEO.R

Description

Convert HK80GEO coordinates to WGS84GEO coordinates

Usage

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HK80GEO_TO_WGS84GEO(latitude, longitude)

Arguments

latitude

latitude in decimal degrees

longitude

longitude in decimal degrees

Details

This function utilizes the simplified relationship between HK80GEO and WGS84GEO described on Page B6 to do the transformation.

Value

latitude

latitude in decimal degrees

longitude

longitude in decimal degrees

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

WGS84GEO_TO_HK80GEO

Examples

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options(digits = 15)
HK80GEO_TO_WGS84GEO(22.323701767, 114.138734989)

### $latitude
### [1] 22.3221739892222
### 
### $longitude
### [1] 114.141179433444

### Answer from the online conversion tool
### 22.322172084
### 114.141187917

Example output

          latitude        longitude
1 22.3221739892222 114.141179433444

HK80 documentation built on May 2, 2019, 2:10 a.m.