Support #11691
Error on when importing geopackage
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Description
Hi Philippe,
I am following the same process of converting shape files to geopackage.
but it showing error when i importing in gisaf. i have attached the snapshot of error below.
Recently i had updated the QGIS latest version 3.16.3.
Associated revisions
Refs #11691: import: explode multi-geometries
History
#2 Updated by Philippe May about 3 years ago
- Status changed from New to In Progress
- Assignee changed from Philippe May to Selvarani C
I think that the error displayed is explicit: the geometry type in the file is "multipolygon", but it should be "polygon".
To understand the difference, have a look there: https://gis.stackexchange.com/questions/225368/understanding-difference-between-polygon-and-multipolygon-for-shapefiles-in-qgis
Qgis has a tool to convert from multi-parts to single-parts: menu Vector => Gemetry tools => Multipart to Single parts. So, you can convert that geopackage to a single parts equivalent, then import it.
That said, we should have a look why that specific file is multiparts. I'll try to come next Monday to office, and we can have a look together.
#3 Updated by Selvarani C about 3 years ago
Hi Philippe,
Yes the problem is that the geometry type in the file is "multipolygon".
When we Converting the geopackage by the version 3.16, the geometry type in the file is "multipolygonZ". so it is not importing in gisaf.
so to find the problem we were tried by the version 3.4, the geometry type in the file is "polygon25D" and it is imported in gisaf.
#4 Updated by Selvarani C about 3 years ago
"Qgis has a tool to convert from multi-parts to single-parts: menu Vector => Gemetry tools => Multipart to Single parts. So, you can convert that geopackage to a single parts equivalent, then import it."
This tool will use to convert the multipart feature to single part feature, I think it will not help in this case to change the geometry type from multi polygon to polygon geometry.
#5 Updated by Selvarani C about 3 years ago
Hi Philippe,
We did a check on converting geo package with different Versions of QGIS from 3.4 to 3.16, In it we found that from version 3.12 to 3.16 It gives the geo package geometry type is "multipolygonZ".
So if we use the latest version means, the geo package should be in “multipolygonZ”, but our gisaf is importing only the “Polygon” geometry type of geo packages.
So for converting geo package can we use the older versions of QGIS?
Waiting for update, because TLC geo packages are wating to import in Gisaf.
#6 Updated by Philippe May about 3 years ago
Sorry for the delay, i didn't notice the last update.
I'll try to see what it would take to make Gisaf import multi* geometries, as i think that would be a very useful feature, and revert shortly.
#7 Updated by Philippe May about 3 years ago
I updated the import with a function to automatically "explode" (make sure multi-geometries are converted to single parts).
The quick test with the same file as shown in the screenshot passed (on my laptop only).
Can you please try with another multi-geometry file?
#8 Updated by Selvarani C about 3 years ago
Thank you very much Philippe.
I have tried, Now the gisaf is accepting the multi-geometry geo packages.
#9 Updated by Selvarani C about 3 years ago
- Status changed from In Progress to Resolved