Add generation of GeoJSON tiles

[ghost]

It could be interesting to be able to generate GeoJSON tiles from a datasource (shapefile, GeoJSON, database, ...) with Landez.

So I think we have to get the intersection of a bounding box and each feature of the GeoJSON. It may be possible using Shapely:

>>> from shapely.geometry import box
>>> from shapely.geometry import Polygon
>>> from shapely.geometry import LineString
>>> a = LineString([(0, 0), (1,2), (2,2)])
>>> b = box(0.0, 0.0, 1.0, 1.0)
>>> tile_content = a.intersection(b)

tile_content.coords contains:
(0.0, 0.0)
(0.5, 1.0)

Even if it does not seem that simple when working with polygons... (Intersection of a polygon (the bbox) and another one (a geometry of the GeoJSON) could give a polygon, a line, a point, multiple lines or multiple points)…

And to read/write the datasource: there is Fiona.