[Qgis-user] MS/SQL layer in 2D suddenly becomes 3D in QGIS preventing updates ?

[Lars I. Nielsen, LIFA A/S]

Thanks Régis.

I do have a default Z value set to 0 in the general settings. It seems like it isn’t always used ☹

I’ll wait see if 3.10.1 changes anything, but I’ll wait until the official release, as I found a work-around for now. I’m using 3.4.9 at present.

But is forcing a dummy 3rd dimension upon a 2D polygon normal QGIS behavior ? Or is that what will be fixed in 3.10.1 ?


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Lars I. Nielsen, LIFA A/S
GIS-kons., FME+Python Certified Professional
Geoinformatik

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Fra: Régis Haubourg [mailto:regis.haubourg at gmail.com]
Sendt: 7. november 2019 11:47
Til: Lars I. Nielsen, LIFA A/S
Cc: QGIS Users List (qgis-user at lists.osgeo.org)
Emne: Re: [Qgis-user] MS/SQL layer in 2D suddenly becomes 3D in QGIS preventing updates ?

Hi Lars,
from what I eard, part of this should be solved in 3.10.1 to be released the 2019-11-22 . if you can install the qgis-release-dev build with osgeo4W advanced installer, can you check it is OK with it?

You should also check the default Z value option in Settings/Digitizing section. This is where you can force the default value.
Regards
Régis

Le jeu. 7 nov. 2019 à 10:14, Lars I. Nielsen, LIFA A/S <lin at lifa.dk<mailto:lin at lifa.dk>> a écrit :
Hi list.

I’m stuck in an odd situation.

I just opened a polygon table from my MS/SQL (2016) for editing. It loads without problems.

I then did some node editing, only moving existing nodes. This was saved without problems.

I then tried to add a couple of new nodes, and then QGIS failed in committing the change !?!


I investigated the error, and it seems that (1) QGIS adds a random Z value (17) to my polygon nodes, and (2) inserts a Z value of “nan” on new nodes. Why???


Question 1: How do I force QGIS to not adding a dummy Z to my loaded polygon layer, i.e. work with it as a 2D geometry ?

alternatively:

Question 2: How do I force QGIS to insert a valid value e.g. a “0” for dummy Z values in all new nodes ?


Yes, I have created tables (or actually views) named “geometry_column” in the relevant schemas _and_ dbo, with a value of 2 for “coord_dimension”. QGIS seems to disregard this setting.

The updated polygon in MS/SQL (from the first editing) is 2D, as expected.



Med venlig hilsen

Lars I. Nielsen, LIFA A/S
GIS-kons., FME+Python Certified Professional
Geoinformatik
[Beskrivelse: C:\Users\lin\AppData\Roaming\Microsoft\signatures\284x82-3741133837051347070]
T

6313 6800

@

lin at lifa.dk<mailto:lin at lifa.dk>

D

6313 6849

W

www.lifa.dk<http://www.lifa.dk>

M

CVR

20937289


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