Invalid Polygons extracted from shapefile

[xrotwang]

A couple of the GeoJSON polygons extracted from the shapefile give warnings like

INFO:shapely.geos:Ring Self-intersection at or near point 32.453069177254385 62.062804436767827

when read with shapely. It's easy enough to fix this (see

rantanenurageo/cldfbench_rantanenurageo.py

Lines 102 to 112 in 53ca334

	for i, poly in enumerate(f['geometry']['coordinates']):
	rings = []
	for ring in poly:
	# Some linear rings are self-intersecting. We fix these by taking the 0-distance
	# buffer around the ring instead.
	p = Polygon(ring)
	if not p.is_valid:
	p = p.buffer(0)
	assert p.is_valid
	rings.append(p.__geo_interface__['coordinates'][0])
	p = shape(dict(type='Polygon', coordinates=rings))

).

But maybe you'd want to fix this upstream, i.e. in the Geographic Database?

[MiinaNo]

This question is probably for @tjrant