[Qgis-user] Issue with coordinates in QGIS 2.10

Andreas Neumann a.neumann at carto.net
Mon Oct 30 23:48:57 PDT 2017


Hi Marian, 

Just a wild guess: 

your QGIS project might have a different coordinate system than the
layer you are editing in. This might explain different coordinates. 

But - not having access to your project, I can't examine that. 

The other thing to check:  

feature = layer.getFeatures.next() 

Is this really returning the feature you just edited? Note that there is
a QGIS plugin called "Plain Geometry editor". It allows you to click on
a feature in the canvas and return their coordinates. In newer QGIS
versions there is also the vertex editor panel with a node list showing
an active features geometry. But not sure if this existed in version
2.10 - which is already quite old. 

Greetings, 

Andreas 

On 2017-10-30 21:05, Tudorache, Marian wrote:

> Hello, 
> 
> I am encountering an issue with QGIS 2.10 which I never had before. 
> 
> When add an arc to the canvas the saved coordinates do not match those from status bar Coordinate  field. 
> 
> Example: 
> 
> Step1: Click the first point at -2766147, 5189893. The value is from Coordinate field of the status bar. 
> 
> Step2: Click right at the  second point having coordinates -1342991, 6725875. The value is from Coordinate field of the status bar. 
> 
> Step3: Click right to draw the line: The line is drawn. 
> 
> Step4: Save the layer. 
> 
> Step5: From the console I extract the points. 
> 
> layer = iface.activeLayer() 
> 
> feature = layer.getFeatures.next() 
> 
> print feature.geometry().asPolyline() 
> 
> The console display: 
> 
> (-1.52996e+06,6.82968e+06), (636778,6.98782e+06). 
> 
> These coordinate are totally different from those captured in Coordinate field of the status bar. 
> 
> How do you explain this? 
> 
> When I hover the mouse over the first and last point of the arc the Coordinate field of the status bar shows the same number for the step 1 and step 2. 
> 
> Which coordinates are correct? 
> 
> Thanks, 
> 
> Marian 
> 
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