Hi Simon,
the GDB is fine. GDAL struggles because it tries to identify the CRS
definition from the GDB (
'PROJCS["GK_31",GEOGCS["GCS_MGI",DATUM["D_MGI",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Gauss_Kruger"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",-5000000.0],PARAMETER["Central_Meridian",13.3333333333333],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]'
) with a known one (EPSG, ESRI) in PROJ CRS database. But there is no
match for the GK_31 name so it has to go to slower methods.
Do you know how that CRS was attributed to the layers ? (through some
choice in a list of predefined CRS ? no idea how Arc stuff works)
I believe this CRS should be identified as EPSG:31255, which in the
current ESRI CRS database, is called MGI_Austria_GK_Central:
PROJCS["MGI_Austria_GK_Central",GEOGCS["GCS_MGI",DATUM["D_MGI",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",-5000000.0],PARAMETER["Central_Meridian",13.3333333333333],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]
Which version of ArcMap / ArcGIS was used to produce this GDB ?
Even
Le 27/01/2023 à 14:34, Simon Gröchenig a écrit :
Hi Even,
great, thank you!
Is the GDB itself fine? Or is there something I can do to fix the
database?
Simon
*Von:*Even Rouault <even.roua...@spatialys.com>
*Gesendet:* Freitag, 27. Jänner 2023 13:38
*An:* Simon Gröchenig <groeche...@zt-gis.at>; gdal-dev@lists.osgeo.org
*Betreff:* Re: [gdal-dev] Bad GDB performance
Hi Simon,
fix queued in https://github.com/OSGeo/gdal/pull/7131
Even
Le 27/01/2023 à 06:49, Simon Gröchenig a écrit :
Hi all,
I am struggling with a bad performance at reading FileGeodatabases
in QGIS. I hope, this is the place where I can find someone to
help me find the bottleneck.
I have uploaded a sample dataset here:
https://mega.nz/file/nnxVULyC#QcuGJEHedayIC7b1i14J0X8OBExVfhcb55DnnVtGzuc
Loading a QGIS project containing this GDB (layer Kataster/GST)
results in a layer loading time of 5+ seconds according to the
QGIS Debugging/Development Tools. I expect less than 1 second to
load this dataset.
I appreciate any help to find if it is a GDAL or a dataset issue?
Simon
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Web: http://www.zt-gis.at/
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