Re: GeoDjango: strip z dimension; force 2D

I did the following: 

from django.contrib.gis.geos import GEOSGeometry, WKTWriter

wkt_w = WKTWriter()

wkt_w.outdim = 2 # This sets the writer to output 2D WKT

polygon = GEOSGeometry(json.dumps(item['geometry'])) # The 3D geometry

temp = wkt_w.write(polygon)

polygon = GEOSGeometry(temp) # The 3D geometry

Here it is in the docs: https://docs.djangoproject.com/en/1.11/ref/contrib/gis/geos/#django.contrib.gis.geos.WKBWriter.outdim

On Monday, 7 March 2016 20:43:05 UTC+2, Jônatas Castro wrote:

In my project I need to import shapefiles and same some geometry.

Some of these are MULTIPOLYGON Z type, but all Z coordinates are 0-value.

When I try to save the geometry, I get the error: "Geometry has Z dimension but column does not".

What is the best way to strip the Z dimension?

My code:

ds = DataSource(file_path, encoding='ISO-8859-1')
layers = ds[0]

#need something HERE to coerce geometry to 2D

obj=MyModel(geometry=GEOSGeometry(layers[0].geom.hex))

obj.save()

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