You could try this:

Use AttributeCreator to create the attribute geopackage_type with value wkb_geometry_collection.

That would tell the geoackage writer the geometry is "2D Feature with multiple geometries".

See this link for documentation.

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You could try this:

Use AttributeCreator to create the attribute geopackage_type with value wkb_geometry_collection.

That would tell the geoackage writer the geometry is "2D Feature with multiple geometries".

See this link for documentation.

Thanks a lot for your answer!

 

I tried to create the attribute geopackage_type with values wkb_geometry_collection and also wkb_multi_polygon. The new attribute is created but the GeometryCoercer can't export anything:

 

 

I get a lot of warnings messages from GeometryCoercer, like "Cannot coerce from IFMEPolygon to fme_multi" or "Cannot coerce from IFMEMultiArea to fme_multi".

 

If I remove the GeometryCoercer, the 8 multipolygons are exported in my Geopackage but they are GeometryCollection and not multipolygons.

 

Thanks for your help :-)

 

 

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Deaggregating before aggregating solved the problem:

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If you need to transform a homogeneous aggregate (IFMEAggregate) consisting of only polygons (IFMEPolygon) to a multiarea (IFMEMultiArea), you can just use the GeometryRefiner.

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