##Welcome to the Homepage of HK80

What is it?

It is an R package for converting HK80 (Hong Kong 1980 geographical coordinating system) to WGS84 and UTM coordinating systems and vice versa.

How to install:

If you are using Windows, install R from a CRAN mirror:

https://cran.r-project.org/mirrors.html

From Start > Program Files > RGui

you can type the R code from the command line.

to install the package, type the following code to command line:

install.packages("HK80")

or install the most updated version from github

library(devtools)
install_github("helixcn/HK80")

How to use?

To load the package HK80 into the current session, please use the following R code

library(HK80)

To see the help file of this package, please type:

?HK80

List of functions available in this package:

• HK80-package:Conversion Tools for HK80 Geographical Coordinate System
• HK1980GRID_TO_HK80GEO:Convert HK1980GRID coordinates to HK80GEO coordinates
• HK1980GRID_TO_HK80UTM:Convert HK1980GRID coordinates to HK80UTM coordinates
• HK1980GRID_TO_WGS84GEO:Convert HK1980GRID coordinates to WGS84GEO coordinates
• HK1980GRID_TO_WGS84UTM:Convert HK1980GRID coordinates to WGS84UTM coordinates
• HK80GEO_TO_HK1980GRID:Convert the HK80GEO coordinates to HK1980GRID coordinates
• HK80GEO_TO_HK80UTM:Convert HK80 geographical coordinates to HK80 UTM coordinates
• HK80GEO_TO_WGS84GEO:Convert HK80GEO coordinates to WGS84GEO coordinates
• HK80GEO_TO_WGS84UTM:Convert the HK80GEO coordinates to WGS84UTM coordinates
• HK80UTM_TO_HK1980GRID:Convert HK80UTM coordinates to HK1980GRID coordinates
• HK80UTM_TO_HK80GEO:Convert the HK80UTM coordinates to HK80GEO coordinates
• HK80UTM_TO_WGS84GEO:Convert HK80UTM coordinates to WGS84GEO coordinates
• HK80UTM_TO_WGS84UTM:Convert HK80UTM coordinates to WGS84UTM coordinates
• WGS84GEO_TO_HK1980GRID:Covert WGS84GEO geographical coordinates TO HK1980GRID coordinates
• WGS84GEO_TO_HK80GEO:Convert WGS84GEO coordinates to HK80GEO coordinates
• WGS84GEO_TO_HK80UTM:Convert WGS84GEO coordinates to HK80UTM coordinates
• WGS84GEO_TO_WGS84UTM:Convert WGS84GEO coordinates to WGS84UTM coordinates
• WGS84UTM_TO_HK1980GRID:Convert WGS84UTM coordinates to HK1980GRID coordinates
• WGS84UTM_TO_HK80GEO:Convert WGS84UTM coordinates to HK80GEO coordinates
• WGS84UTM_TO_HK80UTM:Convert WGS84UTM coordinates TO HK80UTM coordinates
• WGS84UTM_TO_WGS84GEO:Covert WGS84UTM coordinates to WGS84GEO coordinates

To see the help of each function, please type ?nameofthefunction, example:

?WGS84GEO_TO_HK80UTM

To run the example of the corresponding function, copy the R code in the Example section of each help page to the R command Line.

Questions, Comments or Suggestions:

Feel free to send an email regarding to this package to Jinlong Zhang jinlongzhang01@gmail.com