https://github.com/allixender/pydggrid

Python wrapper for Discrete Global Grid (DGG) based on DGGRID

https://github.com/allixender/pydggrid

Repository

Python wrapper for Discrete Global Grid (DGG) based on DGGRID

https://github.com/allixender/pydggrid/blob/master/

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PyDGGRID
==============

A wrapper for DGGRID in python. Currently based on last DGGRID from Kevin Sahr.


  



Documentations
--------------
[![Documentation Status](https://readthedocs.org/projects/pydggrid/badge/?version=latest)]

Changes
------------
- 0.0.16
- [x] DGGRID is updated to version 7.3
- [x] Some bugs fixed
- [x] Richard Barnes's dglib class is decomposed in order to upgrade DGGRID 

- 0.0.15
- [x] Not released
- [x] DGGRID is updated to version 7.1 (https://github.com/sahrk/DGGRID)
- [x] Removed `Boost` Geometry suppert to use `GDAL` support since main `DGGRID` library started to use `GDAL` library
- [x] Added `VCPKG` support for windows version
- [x] Cleaned up setup process

- 0.0.14
- [x] Added different system build environments 


Installation
------------

Note: The main `DGGRID` library needs 'GDAL' library to compile. so make sure you have installed GDAL C++ library before installing. To installing GDAL on linux is pretty straightforward. For windows you can use `vcpkg` to compile and install it. The process of installing and using `vcpkg` on windows can be found on its github (https://github.com/microsoft/vcpkg/)

- Install GDAL on linux
```
sudo add-apt-repository ppa:ubuntugis/ppa && sudo apt-get update
sudo apt-get update
sudo apt-get install gdal-bin
sudo apt-get install libgdal-dev
```

- Install GDAL on windows

Prerequisites:
```
Windows 10, 8.1, 7, Linux, or MacOS
Visual Studio 2015 Update 3 or newer (on Windows)
Git
```
To get started:
```
> git clone https://github.com/Microsoft/vcpkg.git
> cd vcpkg

PS> .\bootstrap-vcpkg.bat
```
then

```
PS> .\vcpkg integrate install
```
Install GDAL packages with
```
PS> .\vcpkg install gdal:x64-windows shapelib::x64-windows
```
NOTE: The GDAL version **must** match with your python compiled version. So if you have a x86 python use `vcpkg install gdal:x86-windows`, othewise use `vcpkg install gdal:x64-windows`

Then simply use pip to install this library

`pip install pydggrid`


Build From source
------------
**On Unix (Linux, OS X)**
 - install GDAL, shapelib
 - clone this repository
 - `pip install ./pydggrid`
 
 or you can easily call
 
 - `python setup.py install`
 
**On Windows**
 - You need Build Tools for Visual Studio to be able to compile it from source. so Install it from this link `https://visualstudio.microsoft.com/downloads/`
 - install GDAL, shapelib
 - clone this repository
 - `pip install ./pydggrid`
 
 or you can easily call
 
 - `python setup.py install`

**How To Use**
In order to use this library use following example. (more updates are comming on documentations section)
```python
#import librarry
import pydggrid as m
#Construct a dggs object
m.dgconstruct()
#getting Q2di index for a (lat,long) point
m.geo_to_q2di(50,50)
#[4, 71, 211]
#getting Q2dd index for a (lat,long) point
m.geo_to_q2dd(50,50)
#[4.0, -0.1427860170187444, 0.7514696738643607]
#getting ProjTri index for a (lat,long) point
m.geo_to_projtri(50,50)
#[3.0, 0.5793988192307712, 0.4993911549756102]`
```



TODO
--------------------------
- [ ]Supporting All DGGRID functions
- [ ]Adding GDAL export Geometry Support
- [ ]Support GridGeneration using DGGRID 

Building the documentation
--------------------------

Documentation for the project is generated using Sphinx. Sphinx has the
ability to automatically inspect the signatures and documentation strings in
the extension module to generate beautiful documentation in a variety formats.
The following command generates HTML-based reference documentation; for other
formats please refer to the Sphinx manual:

 - `cd pydggrid/docs`
 - `make html`


Run tests
---------
To run all tests for the package call folowing command in package directory

```
python3 -m unittest discover
```

License
-------

By using, distributing, or contributing to this project, you agree to the
terms and conditions of this license.

Based on Kevin Sahr's DGGRID library (https://discreteglobalgrids.org).

Developed on top of the R package which was developed by Richard Barnes (https://github.com/r-barnes/dggridR/).

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