# HK80

**Repository Path**: helixcn/HK80

## Basic Information

- **Project Name**: HK80
- **Description**: Conversion Tools for HK80 Geographical Coordinate System
- **Primary Language**: R
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-05-11
- **Last Updated**: 2022-02-07

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# 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, the UTM coordinating system and vice versa.


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

[https://cran.r-project.org/mirrors.html](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:

```R
install.packages("HK80")
```
or install the most updated version from github

```R
library(devtools)
install_github("helixcn/HK80", build_vignettes = TRUE)
```

## How to use? 

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

```R
library(HK80)
```

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

```R
?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:

```R
?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>