HK80GEO_TO_HK1980GRID {HK80} | R Documentation |
Convert the HK80GEO coordinates to HK1980GRID coordinates
Description
Convert the HK80GEO coordinates to HK1980GRID coordinates
Usage
HK80GEO_TO_HK1980GRID(latitude, longitude)
Arguments
latitude |
latitude in decimal degrees |
longitude |
longitude in decimal degrees |
Details
This functions uses equation 1,2,3 in the explanatory note (page C9) to convert the HK80GEO coordinates into HK1980GRID coordinates.
Value
N |
Northern coordinate in meters |
E |
Eastern coordinate in meters |
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)
HK1980GRID_TO_HK80GEO(820351.389, 832591.320)
#### $latitude
#### [1] 22.3237017196981
####
#### $longitude
#### [1] 114.138734989417
#### Answer from the online conversion tool
### 22.323701767
### 114.138734989
[Package HK80 version 0.0.2 Index]