Dear Maria,
OK, I understand. So you have to do the reverse: update your shapefile geometries with the erroneous updated coordinates in the attribute table. Like Nicholas, I supposed you have to handle point data.
You can transfer the coordinates from your table to your geometries with copy and paste.
- Either you still remember the entries on which you have applied changes to or
- you may calculate the differences between actual values (geometries) and desired values (attribute table) in new columns of your table to systematically identify them
Set your point layer to edit mode (toggle editing), the digitizing toolbar should be visible. Select the point you want to apply an update with a right mouse click and the vertex editor appears. There you can transfer your desired coordinates with copy and paste. Up to now I don't know an easy method to update the actual geometry with values in the attribute table automatically (only the reverse).
If you are stuck, consider to contact Nicolas via zoom.
Regards, Christine
Gesendet: Montag, 31. Januar 2022 um 09:48 Uhr
Von: "Maria Shinoto" <maria.shin...@zaw.uni-heidelberg.de>
An: "geo.gu...@web.de" <geo.gu...@web.de>
Betreff: Re: [Qgis-user] check for coordinates in an attribute table for shapefile layer
Von: "Maria Shinoto" <maria.shin...@zaw.uni-heidelberg.de>
An: "geo.gu...@web.de" <geo.gu...@web.de>
Betreff: Re: [Qgis-user] check for coordinates in an attribute table for shapefile layer
Dear Christine,
Thank you for your immediate help. I thought of exporting an importing in the worst case. Since I have already prepared a map / print layout with lots of individual positioning of point labels, I wanted to avoid it if possible. I now had a look on the geometry tools.
Thanks a lot,
Maria
> Am 31.01.2022 um 17:22 schrieb geo.gu...@web.de:
>
> Dear Maria,
>
> if you export your shapefile to csv and reimport it in QGIS with your X and Y values as the valid coordinates again, your problem should be solved.
>
> It's possible and better to edit the geometry directly with the geometry tools.
>
> Regards, Christine
>
>
> Gesendet: Montag, 31. Januar 2022 um 09:03 Uhr
> Von: "Maria Shinoto" <maria.shin...@zaw.uni-heidelberg.de>
> An: qgis-user@lists.osgeo.org
> Betreff: [Qgis-user] check for coordinates in an attribute table for shapefile layer
> Hi,
>
> I imported a .csv file with about 100 datasets and created a shapefile layer from the X and Y data.
>
> Then I did something stupid. I deleted some duplicates and changed the X and Y data slightly in three or four data sets, and I created a new row with one new data point and X and Y data.
>
> What I did no realize is that the data in X and Y will not be accepted automatically as geo coordinates.
>
> Now I have a map without the full set of points, and I do not know the following:
>
> 1. How do I check quickly, which rows need ne geocoordinates from the X and Y columns?
>
> 2. When I figured which data set need updates, how do get the X and Y data into their geocoordinates and get them shown on the map.
>
> Thanks,
> Maria
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
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Thank you for your immediate help. I thought of exporting an importing in the worst case. Since I have already prepared a map / print layout with lots of individual positioning of point labels, I wanted to avoid it if possible. I now had a look on the geometry tools.
Thanks a lot,
Maria
> Am 31.01.2022 um 17:22 schrieb geo.gu...@web.de:
>
> Dear Maria,
>
> if you export your shapefile to csv and reimport it in QGIS with your X and Y values as the valid coordinates again, your problem should be solved.
>
> It's possible and better to edit the geometry directly with the geometry tools.
>
> Regards, Christine
>
>
> Gesendet: Montag, 31. Januar 2022 um 09:03 Uhr
> Von: "Maria Shinoto" <maria.shin...@zaw.uni-heidelberg.de>
> An: qgis-user@lists.osgeo.org
> Betreff: [Qgis-user] check for coordinates in an attribute table for shapefile layer
> Hi,
>
> I imported a .csv file with about 100 datasets and created a shapefile layer from the X and Y data.
>
> Then I did something stupid. I deleted some duplicates and changed the X and Y data slightly in three or four data sets, and I created a new row with one new data point and X and Y data.
>
> What I did no realize is that the data in X and Y will not be accepted automatically as geo coordinates.
>
> Now I have a map without the full set of points, and I do not know the following:
>
> 1. How do I check quickly, which rows need ne geocoordinates from the X and Y columns?
>
> 2. When I figured which data set need updates, how do get the X and Y data into their geocoordinates and get them shown on the map.
>
> Thanks,
> Maria
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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