Easy way of parsing WKT (or GeoJSON) to a fiona.model.Geometry instance

[velle]

For the purpose of learning/testing I would like to hardcode a few instances of fiona.model.Geometry. The following approach does work:

from fiona.model import Geometry
geom = Geometry(type='Point', coordinates=(30,10))

But I would prefer to create them from WKT (for reasons I won't go into here). I was hoping for something like:

geom = Geometry.from_wkt("POINT (30 10)")

I haven't been able to find anything like that. Does Fiona support anything like this?

[velle]

I think I figured out :)

From geojson string to Geometry:

To create a fiona Geometry from a geojson string, first parse that string so it becomes a Python data structure. Then use the spread operator (**), to use the dictionary entries as arguments, on the Geometry constructor.

import json
from fiona.model import Geometry
geojsonstr = '''{"type":"Point", "coordinates": [30, 20]}'''
gj = json.loads(geojsonstr)
geom = Geometry(**gj)
print(geom.type,geom.coordinates) # Point [30, 10]

From WKT string to Geometry:

To do the same for a WKT string, create the geojson-like datastructure gj from WKT with the geomet package.

import geomet.wkt
from fiona.model import Geometry
gj = geomet.wkt.loads('POINT (30 10)')
geom = Geometry(**gj)
print(geom.type,geom.coordinates) # Point [30.0, 10.0]

geomet turns the integer values into float values (30.0 instead of 30), so there is a small difference in the output. I have not looked into whether this could be changed, but afaik for most practical purposes it does not matter.