| HK80GEO_TO_WGS84GEO {HK80} | R Documentation |
Convert HK80GEO coordinates to WGS84GEO coordinates
Description
Convert HK80GEO coordinates to WGS84GEO coordinates
Usage
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
Examples
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
[Package HK80 version 0.0.2 Index]