QGIS 2.18.16/3.0 Renders Multipolygon Shapefile Incorrectly

[qgib]

Author Name: Ralph Tee (@ralphtee)
Original Redmine Issue: 18343
Affected QGIS version: 3.4.4
Redmine category:map_canvas

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QGIS 2.18.16 and 3.0 incorrectly renders a multipolygon loaded from SHP. Please see screen shot below. The arrows point to locations which should be holes. A copy of the data is attached - one in SHP and one in SQLite (DB).

The exact same multipolygon, when QGIS loaded it from SQLite (DB), was rendered correctly. Please see screen shot below.

If ArcMap 10.2 loads the SHP, the result was as in the screen shot below.

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• sample.zip (Ralph Tee)
• Problem.png (Ralph Tee)

[qgib]

Author Name: Giovanni Manghi (@gioman)

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I also see that. How the vector was obtained in the first place, I guess is a vectorization of a raster, correct? what tool was used? how the vector was saved?

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• easy_fix was changed from 1 to 0
• status_id was changed from Open to Feedback
• version was changed from 2.18.16 to 3.0.0

[qgib]

Author Name: Ralph Tee (@ralphtee)

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The original question came from

https://gis.stackexchange.com/questions/257974/postgis-multipolygon-when-converted-to-shapefile-doesnt-match-the-source-geomet/273499#273499

[qgib]

Author Name: Giovanni Manghi (@gioman)

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• subject was changed from QGIS 2.18.16/3.0 Renders SHP Multipolygon Incorrectly to QGIS 2.18.16/3.0 Renders Multipolygon Shapefile Incorrectly
• status_id was changed from Feedback to Open

[qgib]

Author Name: salvatore fiandaca (salvatore fiandaca)

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confirmed in 3.4.4

[qgib]

Author Name: salvatore fiandaca (salvatore fiandaca)

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• version was changed from 3.0.0 to 3.4.4

[SrNetoChan]

Can't reproduce on QGIS 3.17 (master fba5093f18), nor in QGIS 3.16.3, but it was still happening on 3.10.14 (tested on linux)

I think we can close this one @gioman