How to write a geojson file with a geometry type of "MultiPloygon" ?

Question

I read a shp file, and work with the Extruder transformer , after that write to a geojson file, but geojson's geometry type is "MultiLineString", I want to set the geometry type of "MultiPloygon", how to set?

takashi · Accepted Answer

Hi @keplerleee, you may have to transform the extrusion (IFMEExtrusion) to a multi-part polygon (IFMEMultiArea). If the base face for the extrusion was a polygon (not donut), a possible way is:

GeometryCoercer: Transform the extrusion to a composite surface.
GeometryCoercer: Transform the composite surface to a multi-part polygon (each face to polygon).

keplerleee · Answer

Hi @keplerleee, you may have to transform the extrusion (IFMEExtrusion) to a multi-part polygon (IFMEMultiArea). If the base face for the extrusion was a polygon (not donut), a possible way is:

GeometryCoercer: Transform the extrusion to a composite surface.
GeometryCoercer: Transform the composite surface to a multi-part polygon (each face to polygon).

thank you very much?I will try it later?

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