[Qgis-user] ctrl-c selection issue

Tue Jan 9 14:26:05 PST 2018

Thanks for the ideas.

The option to save the selection as new csv file as Ramon suggested, doesn’t work; qgis goes into ‘not responding’ and no csv file is added to the layer list. However, a csv file is made, lacking a decent number of objects (first test 15095 of 18582 objects and second test is 15179 of 18582 objects, so missing about 3,5k objects). This csv file can be opened manually in qgis.

And I checked: this options does work for selections where the ctrl-c option also worked. Then the new cvs layer is added to the layer list in no time.

Is there some sort of log file in qgis that might give clues to the ‘not responding?

@Kirk

I did close and reopen qgis multiple times, even shut down the pc entirely, but to no effect. Selections that did allow for copying earlier, still work: I can make that selection again and ctrl-c works fine. Seems to me this rules out memory-issues.

Gr.

Jeroen

Van: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] Namens Kirk Schmidt
Verzonden: dinsdag 9 januari 2018 22:20
Aan: qgis-user at lists.osgeo.org
Onderwerp: Re: [Qgis-user] ctrl-c selection issue

After a few selections, you may have to close and reopen qgis to purge the memory as well. Importing a csv is memory intensive so another approach is to try saving as a spatial database (SQLite) or even a shapefile.  Once written, you can load the spatial file and you should have lots of memory to keep selecting points. 

Kirk

On 1/9/2018 4:58 PM, Ramon Andinach wrote:

I’m not sure what the problem is, but if I were doing that repeatedly, I’d probably use Layer -> Save As, tick the Save Only Selected Features box and save it to CSV.  Then muck about with excel later. 

This way ought to be a bit lighter on the memory. 

Ramon.

On 10 Jan 2018, at 04:25, Jeroen Hovens <mail at groenebij.nl <mailto:mail at groenebij.nl> > wrote:

Hi,

Using qgis 2.14.18 I have been working today with a large csv file (7.5 mln objects). I just need selections of this database which I can then modify in excel. So I opened the attribute table and made a selection based on a specific value for an attribute, and copied that selection (about 30.000 objects) via the clipboard (ctrl-c) to a new Microsoft Excel file, then saved the excel file and repeated the process for another selection. This worked perfect for some time. However, some selections won’t copy: when I press the copy button the programs turn to ‘not responding’ and won’t snap out of it anymore.  Selection size when this happens is about the same (about 20k to 35k objects).

What could be the problem? Could the data be corrupted? How can I check what is wrong?

Thank you

Gr.

Jeroen 

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