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qgis / QGIS

QGIS is a free, open source, cross platform (lin/win/mac) geographical information system (GIS)
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SAGA Kriging in QGIS is slower than in SAGA itself #20779

Closed qgib closed 5 years ago

qgib commented 9 years ago

Author Name: Marcel Foelsch (Marcel Foelsch) Original Redmine Issue: 12672 Affected QGIS version: 2.8.1 Redmine category:processing/saga Assignee: Victor Olaya

The interpolating tool (saga ordinary kriging) is very slow in QGIS. It took 30 minutes in QGIS to interpolate a shape file with 300.000 points. The same job was done in SAGA GUI within 3 minutes.

qgib commented 9 years ago

Author Name: Victor Olaya (@volaya)

When calling from QGIS there is a need for more operations, since SAGA does not generate results in formats compatible with QGIS. So this is not a bug, but a result of that, and there is nothing we can do.

You can try yourself to run all the operations that QGIS performs with SAGA(you can see that in the log, where all console calls are written), and compare that to the cost of doing it directly in SAGA, and the result will probably be very similar.