Support for Elasticsearch circle geo_shape objects

[warwickdufour]

I work in the field of visualising aviation data such as aerodromes, airspaces and airways. Recently I needed to visualise NOTAMs which, at their most basic, consist of a point and circle radius and as far as I know ElasticGeo does not support them.

I have cloned and modified ElasticGeo so that it does support them, albeit quite simplistically. If it is of interest I am happy to contribute my additions to the code base but as it has been a long time since I did so I would like some help with the whole 'pull request' process.

[sjudeng]

Sounds great. Thanks for thinking of contributing the feature. Here are some links on the PR process in general.

1. Fork this project
2. Add remote for your fork:
   git remote add warwickdufour https://github.com/warwickdufour/elasticgeo.git
3. If you haven't already create a branch for your feature:
   git checkout -b circle
4. Push your feature branch to your remote:
   git push warwickdufour circle
5. Create pull request through the GitHub UI
6. (If necessary) push updates to your branch based on pull request review feedback:
   git commit ...
git push warwickdufour circle

[warwickdufour]

Hi @sjudeng , taken me a while to get round to it I'm afraid but I'm just about to create a pull request. I'm presuming I should 'compare across forks' as per the attached image:

[sjudeng]

Closed in #67