Mars Sjoden marsofearth at gmail.com
Fri Jan 12 11:53:20 PST 2024

QGIS version: 3.28.14-Firenze
GEOS version: 3.9.1-CAPI-1.14.2

*Algorithm 'Fix geometries' starting…*

The structured method to make geometries valid requires a QGIS build based
on GEOS 3.10 or later

Hi Mars Sjoden,
as explained in the "Fix geometries" processing algorithm's help page [1], a QGIS version built with the GEOS library version 3.10 or later is required in order to use the "Structure" repair method.

Since your QGIS build uses a GEOS 3.9 version, you can obviously only use the "Linework" repair method. So you need to select the "Linework" method for the "Repair method" parameter in the processing algorithm dialog window.

Alternatively, you can install and use a QGIS version build with a more recent GEOS version as instructed in the Download page of the QGIS website [2][3]. This way you can use both the "Linework" and the "Structure" repair methods with the "Fix geometries" processing algorithm.

Best regards.

Andrea


[1] https://docs.qgis.org/3.28/en/docs/user_manual/processing_algs/qgis/vectorgeometry.html#fix-geometries
[2] https://qgis.org/en/site/forusers/download.html#mac
[3] https://qgis.org/en/site/forusers/alldownloads.html#macports
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