There is a way to coerce the input to 2d. It's not pretty, but it works. from django.contrib.gis.geos.prototypes.io import wkt_w wkt = wkt_w(dim=2).write(input_geom).decode() geom = GEOSGeometry(wkt, srid=4674)
Imagine that you get input_geom from somewhere. In our case it was coming from a KML upload. We forced it to 2d using that snippet of code. On Mon, Dec 19, 2016 at 9:51 AM, <a.gra...@gmail.com> wrote: > Jason: when you say create 2 geometry types one with 2 dimensions etc... > how do you specify how many dimensions to have? > Because I created the field in this way: > > geom = models.MultiPolygonField(geography=True, spatial_index=True) > > and let the Django migration do the job, but I don't know how to specify > that it's a 3D field. > > Thanks > > On Tuesday, 8 March 2016 16:34:35 UTC, Jason wrote: >> >> I had a similar issue when uploading a kml to geojson conversion to >> postgis using geodjango. There is no efficient way to do it in Django, so >> I ended up doing a workaround >> >> >> - Create two geometry types, one with dims=2 and other with dims=3. >> Allow both to be null and set default to null >> - When updating, check the geometry dimension via GEOSGeometry.hasz >> >> <https://docs.djangoproject.com/en/1.9/ref/contrib/gis/geos/#django.contrib.gis.geos.GEOSGeometry.hasz>. >> If the return is 2, save the geom in the 2D field, otherwise save to the >> 3D >> >> You can create a save/retrieve method on the model to handle this for you. >> > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-users+unsubscr...@googlegroups.com. > To post to this group, send email to django-users@googlegroups.com. > Visit this group at https://groups.google.com/group/django-users. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/django-users/073345f1-0a70-4645-9c87-577c89b9a511%40googlegroups.com > <https://groups.google.com/d/msgid/django-users/073345f1-0a70-4645-9c87-577c89b9a511%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- George R. C. Silva Sigma Geosistemas LTDA ---------------------------- http://www.sigmageosistemas.com.br/ -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAGyPVTsF1CYmw5gushj8Ky7DLV%3DMRrpf01qFBEY1bUFWtE07mg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
