Hi Dennis,
Chris gave some good suggestions. If you are only concerned with the geometry,
you can try these suggestions. First, make sure that you have a spatial index
on the layer. Second I think you want to dissolve the polygons, not union them.
You can also try using the Subdivide processing algorithm first, which will
make your spatial index more efficient. Then do a dissolve, and if you want
distinct polygons use the Multipart to Singleparts algorithm.
-Thayer
On Friday, March 3, 2023 at 03:00:50 PM EST,
qgis-user-requ...@lists.osgeo.org <qgis-user-requ...@lists.osgeo.org> wrote:
Date: Fri, 3 Mar 2023 19:22:54 +0000
From: Dennis Burgess <dmburg...@linktechs.net>
To: "qgis-user@lists.osgeo.org" <qgis-user@lists.osgeo.org>
Subject: [Qgis-user] GPKG Multi-Layer to one flat
Message-ID: <cc1d4c6d496b48a4a59fe7f2301e0...@linktechs.net>
Content-Type: text/plain; charset="us-ascii"
Ok, has to be a simple solution.
I have a GPKG file that is around 50 meg. This has multiple layers or at least
I can see multiple layers. I.e. I have one polygon on top of another
What I want is to flatten these, to where ONLY the exact area that is show is
displayed in the smallest file possible.
Union is the way to do this but its SLOW SLOW.. any other options... ?
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