Hi Casper,

I meant the CRS set in the layer's properties for the layer in question. As you said both are using the same project so the project's CRS should be the same in both cases. In your first mail you state that the project's CRS is EPSG:25832 and the layer's is EPSG:3044. There is the missmatch. Change this to EPSG:25832 and all is fine. Check if the layer's CRS has been set to EPSG:25832 on the working computer. If the very same layer loads into the very same project with different CRS on different machines then this is a question of QGIS in general and has nothing to do with DigitizingTools (which is just pointing out the difference).

Bernhard

Am 08.04.2016 um 12:43 schrieb Casper Børgesen (CABO):
Hi Bernhard

Since its the same QGIS project were opening on the different computers, I 
would expect them to behave the same. The current CRS (as stated in the bottom 
right of the QGIS window) is EPSG:25832 (OTF).

I tried replacing the PRJ file of problematic shape file with the PRJ from the 
working shape file (see the first mail), but QGIS still displays the warning.


Regards, Casper

-----Original Message-----
From: Bernhard Ströbl [mailto:[email protected]]
Sent: 8. april 2016 11:38
To: Casper Børgesen (CABO); [email protected]
Subject: Re: [Qgis-developer] Warning from DigitizingTools about CRS mismatch

Hi Casper,

no idea why they behave differently. Are the settings for the layer's SRS on 
both machines the same?
As I wrote, the warning is shown if there is a missmatch in the project's and 
the layer's SRS-id.

Bernhard

Am 08.04.2016 um 11:13 schrieb Casper Børgesen (CABO):
Hi Bernhard

Thanks for your answer.

Yes I know that QGIS tries hard to determine the SRS-id which matches the 
values of the PRJ file. But my main issue is why it displays the warning only 
on one computer and not the others (same QGIS project with same data)?

Which mechanisms could trigger the difference in whether the warning should be 
shown or not?

We are running QGIS 2.14.0 64 bit on Windows 7.


Regards Casper


-----Original Message-----
From: Qgis-developer [mailto:[email protected]]
On Behalf Of Bernhard Ströbl
Sent: 8. april 2016 10:38
To: [email protected]
Subject: Re: [Qgis-developer] Warning from DigitizingTools about CRS
mismatch

Hi Casper,

DigitizingTools compares _only_ the SRS-id (SRS =
SpatialReferenceSystem) of the project and the layer. If they missmatch the 
warning is thrown so the user gets a hint why certain functions are greyed out.
Thus relevant is not the prj file but the SRS assigned to the layer and the 
project in their properties. To solve this issue: if they share a common 
projection, go in the layer properties and choose the same SRS as the project's 
from the list of projections.
Background (AFAIK): In Shapefiles the data do not carry information on their 
SRS (like e.g. in PostGIS or gml). This information is contained in the 
(optional) prj file. QGIS reads the prj file and assigns the first matching SRS 
to the data (matching = definition is identical). If there is none matching, a 
USER-SRS is created with the projection information given in the prj file.

Bernhard

Am 08.04.2016 um 10:10 schrieb Casper Børgesen (CABO):
Hi!

I have a user who constantly get a yellow warning from QGIS when he enables 
editing on set of specific shape files. The message is:

DigitizingTools: Amend Line is disabled because layer CRS and project CRS do 
not match!

The project CRS is EPSG:25832. The shape file has the following .prj file:

PROJCS["ETRS_1989_UTM_Zone_32N",GEOGCS["GCS_ETRS_1989",DATUM["D_ETRS_
1
989",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich"
,
0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercat
o
r"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.
0
],PARAMETER["Central_Meridian",9.0],PARAMETER["Scale_Factor",0.9996],
P ARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

In "layer properties/General/Coordinate reference system", QGIS displays "Selected 
CRS (EPSG: 3044, ETRS89 / ETRS-TM32".

If he enables editing on a shape file with the following .prj file, it doesn't 
happen:

PROJCS["ETRS89_UTM_zone_32N",GEOGCS["GCS_ETRS_1989",DATUM["D_ETRS_198
9
",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],U
N
IT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],
P
ARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",9],PARA
M
ETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMET
E R["false_northing",0],UNIT["Meter",1]]

The strange thing is that this only happens on his computer not on a couple of 
other machines we have tried on.

If there indeed is a CRS mismatch it make sense, but he is the only of our 
users experiencing this.


Regards, Casper






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