Convert WGS84GEO coordinates to WGS84UTM coordinates

Convert WGS84GEO coordinates to WGS84UTM coordinates

WGS84GEO_TO_WGS84UTM(latitude, longitude)

Arguments

latitude	Latitude in decimal degrees
longitude	longitude in decimal degrees

Details

This function uses equation 1, 2, 3 in the explanatory notes to compute the WGS84UTM coordinates.

Value

N

The northern coordinates in meters

E

The eastern coordinates in meters

zone

zone for UTM, either 49 or 50

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

Author

Jinlong Zhang

Note

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

See also

WGS84UTM_TO_WGS84GEO

Examples

options(digits = 15)
WGS84GEO_TO_WGS84UTM(22 + 26/60 + 1.26/3600, 114 + 10/60 + 29.31/3600)
#>                  N                E zone
#> 1 2483566.19687669 209189.467417282   50

#### 22.433683333333334531
#### 114.17480833333333123

#### $N
#### [1] 2483566.19687669
#### 
#### $E
#### [1] 209189.467417282
#### 
#### $zone
#### [1] 50

### Answer from the explanatory notes
### 2483566m N
### 209194m 
 
### Answer from 
### http://www.geodetic.gov.hk/smo/tform/tform.aspx
### 2483568m N
### 209192m E