[Qgis-developer] Geospackage Slow in QGIS
JPalmer at linz.govt.nz
Sat May 17 13:19:00 PDT 2014
I'm wondered why QGIS needs a native SpatiaLite provider and connection dialogue any more. Unlike other database providers such as PostGIS, Oracle, MSSQL the SpatiaLite provider doesn't seem to have anything special that requires a QGIS provider. From a users perspective it just adds to the confusion and complexity for adding data. Why not just use GDAL/OGR for both Geopackage and Spatialite?
From: Stefan Keller [sfkeller at gmail.com]
Sent: Sunday, 18 May 2014 12:24 a.m.
To: Martin Dobias
Cc: Jeremy Palmer; qgis-developer at lists.osgeo.org
Subject: Re: [Qgis-developer] Geospackage Slow in QGIS
It has a different binary encoding compared to Spatialite.
And in addition it integrates raster tiles (MBTiles) and metadata.
2014-05-17 14:10 GMT+02:00 Martin Dobias <wonder.sk at gmail.com<mailto:wonder.sk at gmail.com>>:
On Sat, May 17, 2014 at 2:32 PM, Jeremy Palmer <JPalmer at linz.govt.nz<mailto:JPalmer at linz.govt.nz>> wrote:
> I've just been using the new implementation of Geopackage in QGIS :) However each map render or feature info is very slow for large database files - even with the new GDAL/OGR Geopackage spatial index support. Each time QGIS renders a new map view or executes a feature info it re-opens the Geopackage file in QgsOgrFeatureIterator via OGROpen, and the Geopackage driver open method runs PRAGMA integrity_check which is very slow (4 secs with my 2GB test file). This integrity check is actually a Geopackage requirement.
> How can this be fixed? At the in QGIS or GDAL/OGR level?
Actually I am wondering how different is the format of GeoPackage from
the format of SpatiaLite... we could use our native SpatiaLite
provider also for GeoPackage files if they are close enough. Any
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