1
vote
2answers
33 views

How does QGIS Identify Features plugin work i.e. what is logic behind it?

I'm new to QGIS and python as well. I need attributes and their values of a selected vector layer, in the similar manner as Identify Feature works only difference is I don't wish to show them in a ...
2
votes
1answer
69 views

'QgsVectorDataProvider' object has no attribute 'select'

I want to create a tool layer in QGIS 2.4 that will select any vector features that intersect with that point. In my script I tried the following function: def selectFeature(self, point, button): ...
1
vote
1answer
38 views

Rotating geometry to specific angle using pyqgis?

I do not know how to rotate a geometry using pyqgis. Is there any sample/example code available to show me how?
0
votes
0answers
17 views

Parsing file didnt appear in textBrowser

I make QGIS plugin to parsing xml and show parsed file in textBrowser, however when i run the plugin, its still blank ( nothing happend ) and i didn't get error messsage when run it, this is the full ...
0
votes
0answers
35 views

Visualize bounding box to square like polygon

I want to add script in my plugin to visualize bounding box into a polygon shape, bounding box i try to visualize have format like this: (X1,Y1) (X2,Y2) (X1,Y2) (X2,Y1) Does QGIS/PYTHON have ...
1
vote
1answer
85 views

Unknown error concurring when developing QGIS 2.0.1 plugin in Windows 7

I am following the tutorial found here for developing a simple QGIS plugin within QGIS 2.0.1 installed on Windows 7. However, as I have began to try developing a link between the GUI and each the ...
1
vote
1answer
104 views

Is it possible to run qgis through python?

I need to build an app to analyze some raster layers in qgis. I thought it was possible to just write code in python (2.7.6) (IDLE) and let it automatically open QGIS, load some layers, do a distance ...
0
votes
0answers
24 views

random point through raster

I've some issue in some task pls help if you can as I've not good python skills. I've a raster with values from 5 to 97 and I want a python script which can scan the raster and generate random points ...
0
votes
0answers
96 views

Missing pyexpat on QGIS 2.0.1: pyuic4 fails

I have encountered a problem when trying to develop a custom plugin for QGIS 2.0.1 (Python 2.7.5 with two additional Python installations on the same machine). When I try to compile the UI file ...
1
vote
2answers
138 views

How to Project a point on feature in PyQgis?

In Arcgis IProximityOperator.QueryNearestPoint Method was available to get the nearest point. Similarly Is there any function available in pyQgis? Thanks in Advance.
4
votes
0answers
89 views

How can I create a form so the user has to be authenticated to access a project?

I have a login form in QGIS and when it is loaded, python gives me an error for, apparently, not recognizing the findchild part. This is due to the fact that the form isn't loaded before the script is ...
4
votes
2answers
467 views

How can I define the layer CRS for a memory layer in pyqgis

how can I define the CRS for a memory layer from the qgis project settings vpoi = QgsVectorLayer("Point", "vectpoi", "memory") feature = QgsFeature() ...
1
vote
0answers
53 views

How do I make vectorlayer with sql on PostGis via python code

I need to make a vectorLayer and fill with the SQL's results on PostGIS via python code. I'm working with python 2.7, QGIS 1.8 and PyQt 4.5 How do I it ? thanks
0
votes
0answers
810 views

QGIS Plugins - DLL load failed: %1 is not a valid Win32 application

This is my first question so please go easy. I am trying to develop a Plugin for QGIS. I made my plugin using the "plugin builder", then compiled the .qrc and .ui files with PySide-rcc.exe and ...
1
vote
1answer
531 views

QGIS python - reference a layer in the table of contents

I'm trying to create a plugin for QGIS using python, But need some help. I want to 1.Zoom to a layer and 2. make the layer visible(switch off or on). But I have managed to zoom to an active layer by ...
3
votes
0answers
113 views

Why are my raster mean and standard deviation -1?

I have a set of about 25 rasters whose descriptive statistics I have been examining. The data in the rasters were calculated in Python and the rasters were created using Python-GDAL. In all but one ...
1
vote
0answers
138 views

Spatial Filter in Qgis Using Python

Is it possible to create buffer and get intersected features in Qgis using Python? I did in ArcObjects.but i need the same in QGIS also. Dim topo As ITopologicalOperator topo = chkPoint Dim sFc As ...
0
votes
1answer
383 views

Getting error in compiling make file for plugin build in qgis 1.8

I am using QGIS 1.8 for building plugin. For developing i am using following ref this link example. where in this step 6 where compile the makefile in OSGeo4W. gives error pyuic4:command not found. I ...
1
vote
3answers
650 views

How to setup a debugger for QGIS Plugin development?

As the title of the question implies, I wish to know how to set up a QGIS Python Plugin Debugger so that I can develop plugins more efficiently. Any information regarding this would be much ...
0
votes
1answer
265 views

How to use expression in QgsVectorlayer label by using python?

how to show the two field values as a label on features. I have done it for a field called "ErrorDescr" with this i need to show another field values. Other field is "MarkerId" ...
0
votes
1answer
265 views

Running a script with QgsFeature from within the console

I am trying to run a script from the QGis Python console (similar to: http://spatialgalaxy.net/2012/01/27/qgis-running-scripts-in-the-python-console/) The line feat=QgsFeature() operates fine from ...
1
vote
1answer
642 views

QGIS python location problem

It seems that MacPorts installs Python27 in /opt/local, but that MacPorts QGIS updates and uses the Apple Python27 in /Library. The result is that MacPorts additions to Python27 such as OpenCV don't ...
4
votes
1answer
272 views

Personal shell launcher for PyQGIS

I have changed a shell launcher found at http://inasafe.linfiniti.com/html/id/developer-docs/platform_windows.html as to fit my wish: setting the system environment variables to be able to use PyQGIS ...
0
votes
1answer
292 views

Using macports python 2.7 with macports qgis

I installed qgis through macports on my mac running OSX 10.8.2 but when I run the application (qgis 1.8) it says that I don't have python-gdal installed. I searched google and it appears that it is ...
0
votes
1answer
147 views

gdalwarp cant find libproj.dlib

Thought I had finally got Python, gdal and QGIS to play nicely together but just tried to do a batch transform using a bash script to call gdalwarp and it claimed it couldn't read the libproj.dlib ...
1
vote
0answers
280 views

DLL problem with PyQGIS

I am having problems with Python Shell importing the module "qgis.core". When I type "import qgis.core" the Shell ("idle.pyw") gives me this error: Traceback (most recent call last): File ...
2
votes
2answers
1k views

Combining Python and QGIS out of console

I was wondering if it's possible to use Python and QGIS out of QGIS environment (namely, avoiding the use of the console). I'm pretty new to QGIS, I've been always using ArcGIS 10.1. What I am looking ...
5
votes
1answer
1k views

How can I Setup Python to recognize QGIS

I want to use QGIS and work with Python out of the console, but I'm having troubles letting the system recognize the paths of some DLLs. Since I couldn't find a good answer on the web, I wonder if I ...
2
votes
2answers
136 views

Invalid Username When Developing a QGIS Plugin on Mac

On a fresh Mac OSX 10.8 install, I've installed Quantum GIS from Kingchaos binaries and it's running fine. I'm trying to develop a plugin for QGIS using Plugin Builder. The skel that Plugin Builder ...
1
vote
2answers
279 views

Start-up error message in QGIS: Unable to load the extension GoogleLayers causes an error when calling its method initGui () [duplicate]

Possible Duplicate: Problems with Google layers plugins Impossible de charger l'extension GoogleLayers provoque une erreur lors de l'appel de sa méthode initGui() Traceback (most recent ...
3
votes
1answer
706 views

How to style a layer from console?

I am new to the QGIS python console. I am trying to load a raster layer from the console, set the crs and a specific style from a qml file. layerPath = os.path.join(raster_dir,raster_name) fileInfo = ...