A version of the Python programming language

learn more… | top users | synonyms

0
votes
1answer
159 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 ...
2
votes
2answers
306 views

Help with Python and adding a grouplayer to arc, renaming it from a folder name, then adding layers to it from that folder

I am trying to use os.walk to go through a directory tree, pull out all the .shp files in it, create a grouplayer in the mxd, rename the grouplayer the folder name, then add the layers from that ...
1
vote
1answer
233 views

Make Table View with field_info Output

I am using Make Table View to copy data from one table to a table view object and in the process hide and/or rename some fields. When I output the data to a dbf it hides and/or renames the fields ...
0
votes
1answer
261 views

Dissolving shapefile python script not working, syntax help please

I do not understand why this simple script won't work. I can get it to dissolve in model builder but not from a script that I run from inside the map document. My output results are 4 polygons, just ...
2
votes
1answer
258 views

Python Script that calls the Voronoi Polygons Function?

I've been looking to see if there was a way to call Voronoi Polygons function found in Vector/Geometry Tools, directly from the code but I have not found one. Does this currently exist? Is there a way ...
1
vote
1answer
496 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 ...
1
vote
0answers
239 views

ArcMap runs custom script once and then it crashes on second run

So I made a script that takes data from an MSSQL database and inserts it into a featureclass. I added the script to a toolbox and am able to run the tool from within ArcMap 10.1. The problem is that ...
0
votes
3answers
60 views

Using Sort_Management for multiple tables

I like to convert tables (100+) living in access database to a geodatabase tables, sorting them and deleting unnecessary fields in each table at the same time. I figured I use the Sort_management ...
2
votes
1answer
199 views

Convex Quadrilateral Polygons subdivision in equal parts using Python / OGR

Consider an irregular polygon (P) which has four vertices. I would like to subdivide P into smaller polygons as shown here http://i.stack.imgur.com/4SKhB.jpg In the old days I was using ArcGIS 9.3 ...
4
votes
1answer
229 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 ...
3
votes
2answers
274 views

Concatenate only when all fields to be concatenated have values

I have two fields that I want to concatenate. Field1 contains null values and Field2 has values for every record. I want to concatenate only when both fields have values. I tried using a function ...
3
votes
0answers
177 views

How do I write XML metadata with Python?

Some Python software I have written generates raster files via GDAL. I would like the software to create an XML metadata file for each raster so that I can include details about how the raster was ...
0
votes
1answer
240 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 ...
1
vote
0answers
114 views

How to draw nodes of a graph in Python and link them to a table?

I would like to draw some points with a Python GUI, like a graph, and link those points to a table.
0
votes
1answer
97 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 ...
3
votes
1answer
512 views

Import functions in python Add-In logic script

I am running into an error. I have a set of functions which I want to import in the python Add-In script at the time of execution, but when I built Add-In with "import stats" line then tools are ...
2
votes
1answer
86 views

How to declare folder name as global?

I have asked similar question at stackoverflow but posting here as well since it involves ArcGIS and python Add-In. Following code shows first step where i have to declare output folder as global so ...
3
votes
2answers
3k views

Read specific column and row value from a text file using Python [closed]

I have a text file as following: 1.25 177. 1.50 220. 2.00 272. 5.00 427. 10.00 556. 25.00 763. 50.00 916. ...
1
vote
0answers
251 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
955 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 ...
4
votes
1answer
314 views

Efficient computation of nearest distance for each point to closest polygon

I'm looking for a more efficient way to compute the nearest distance between features from 2 layers, in this example for each point the nearest distance to the closest polygon. Is there a more ...
2
votes
1answer
255 views

OGR Python bindings

When I try to access one of the GRASS vector files through Python OGR bindings, it gives error: Here is the script code in Python 2.7.3 IDLE (GUI) in Windows 7. from osgeo import ogr ds = ...
6
votes
2answers
494 views

Calling GRASS functions from external Python

I have GRASS 6.4.3svn installed in my machine running Windows 7. Also in my machine i installed Python 2.7.3 for Windows.Now i need to call GRASS libraries from Python and not within the Python shell ...
0
votes
2answers
136 views

How to parse fields values using ArcView 10.0 scripting

I am using 10.0 ArcView and am trying to get the "R" in R12345678910 to drop. I lost all my scripts I've saved and appreciate some assistance. The numbers are in a column in the attribute table and ...
3
votes
2answers
490 views

How to draw rectangle to clip layers using python addin in ArcGIS 10.1?

I want to clip rasters in data view using interactive rectangle (to define Area of Interest) and add them to current dataframe. Following is a piece of code which is not returning anything. Any ...
3
votes
1answer
264 views

Pasing multivalue parameter using arcpy

I am trying to get my head around how multivalues derived from the arcpy command GetParameterAsText gets looped through a script. Could some please provide a sample script that does the follow basic ...
2
votes
2answers
121 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 ...
0
votes
1answer
351 views

zonal histogram fails to create output table when looping

Using python I'm having problems when trying to attempt a FOR LOOP with the ZonalHistogram function of ArcGIS 10.1. It works fine if I use it only for one image but it gives me this error while for ...
2
votes
1answer
127 views

Why does ogr's CreateLayer() return None?

Why does ogr's driver method CreateLayer return None? I'm using python 2.7 with gdal 1.9.1. path = r'D:\_tempAuto' out_shp = '%s\test_OGR.shp' % (path,) driver = ogr.GetDriverByName('ESRI ...
0
votes
0answers
825 views

Use Python to change datasource from a feature class to a view built on the feature class

I'm trying to replace the datasource for all of the layers in my map document using Python but I keep running into an error. Right now, all of the layers point to a feature class called ...
1
vote
2answers
261 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
534 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 = ...
1
vote
0answers
182 views

Mapnik: mapnik.has_pycairo() returns False. How to fix this on Windows for Python27?

I'm trying to modify rundemo.py (comes canned with Mapnik Windows binaries) to render output files at a higher resolution, but it seems I still have issues with my Mapnik-to-Cairo setup. I've got ...