HK80GEO_TO_HK80UTM: Convert HK80 geographical coordinates to HK80 UTM coordinates
In helixcn/HK80: Conversion Tools for HK80 Geographical Coordinate System

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

Convert HK80 geographical coordinates to HK80 UTM coordinates

1	HK80GEO_TO_HK80UTM(latitude, longitude)

`latitude`	Numeric, latitude in decimal format.
`longitude`	Numeric, longitude in decimal format.

Using equation (1) to (3) in the explanatory Note within this package. The document is available at : http://www.geodetic.gov.hk/smo/gsi/data/pdf/explanatorynotes.pdf

A list including the HK80UTM Coordinates, including: N, E, and Zone.

The latitude and longitude input should be constrained to Hong Kong.

Jinlong Zhang

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

HK80UTM_TO_HK80GEO

options(digits = 15)
#### The example on the explanatory notes
HK80GEO_TO_HK80UTM(22 + 26/60 + 6.76/3600, 114 + 10/60 + 20.46/3600)
#### Output
##  $N
##  [1] 2483772.487
##  
##  $E
##  [1] 208931.9164
##  
##  $zone
##  [1] "50Q"

###### The results from the explanatory notes
#### 2483772, 208932

###### The similar conversion is not available 
###### from the online conversion tool.