Converting GeometryField to MultiPolygon using GeoDjango?

[Jack]

I am trying to add a bunch of school boundary files into the database.  The boundary files are inconsistent.  They are processed by `DataSource` as either `Polygon`, `MultiPolygon`, or `GeometryCollection`.

Converting `Polygon` into `MultiPolygon` is fairly simple using this solution(https://gis.stackexchange.com/questions/13498), but the conversion does not work for `GeometryCollection`.

    class School(models.Model):

        boundaries = models.MultiPolygonField()

    ---

    from django.contrib.gis.geos import Polygon, MultiPolygon

    from django.contrib.gis.geos.collections import GeometryCollection

    ds = DataSource('school_boundaries.aspx')

    feature = ds[0][0]

    geom_geos = feature.geom.geos

    if isinstance(geom_geos, Polygon):

        geom_geos = MultiPolygon(geom_geos)

    elif isinstance(geom_geos, GeometryCollection):

        geom_geos = MultiPolygon(GeometryCollection)  #This does not work

    school = School(boundaries = geom_geos)

    school.save()

Is there some way to convert `GeometryField` to `MultiPolygon` in GeoDjango?

[Jack]

See original question on Stack Overflow for better formating.

[Jani Tiainen]

Hi.

I usually do data cleanups with QGIS tool which has excellent tools to manipulate data. And it's relatively fast.

Of course if you need to import data more regular basis QGIS might not be an option.

ke 13. kesäk. 2018 klo 21.30 Jack <valac...@gmail.com> kirjoitti:

See original question on Stack Overflow for better formating.

--
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...@googlegroups.com.
To post to this group, send email to django...@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/8b8f53c5-2e53-4ec8-b2e6-7c7ec18ed5fe%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.