Python is an open source interpreted programming language used in many GIS programs.

learn more… | top users | synonyms

2
votes
2answers
636 views

How to import qgis.core to python IDLE?

I try to follow the step in How to import qgis.core to python app? to import qgis.core with Python Shell. But when I type set PYTHONPATH=C:\Program Files (x86)\Quantum GIS Wroclaw\apps\qgis\bin it ...
2
votes
1answer
331 views

How to upload a shapefile to geoserver using cURL and replace file?

In the sequence of this: How to upload a shapefile to geoserver using cURL? which was properly solved, I now need to be able to replace the existing file, cause my process is to be repeated every ...
2
votes
1answer
582 views

How to add a progress bar to a python plugin?

I would like to add some type of progress bar to my Qgis python plugin. Can someone point me to an example?
2
votes
1answer
107 views

Listing installed QGIS plugins via PyQGIS

Can you please tell me how I can programmatically (or from the console) access the loaded plugin list? I tried: QgsProviderRegistry.pluginList() but got: TypeError: ...
2
votes
1answer
365 views

python multiprocessing error in QGis (Windows)

I have this error when I try to use Manager() from python multiprocessing library. (Just start QGIS open Python console and execute the two following lines) >>> import multiprocessing ...
2
votes
1answer
282 views

How to get all attributes from a non geometry PostGIS layer with Python in QGIS?

I want to extract all attributes from a non geomety layer in QGIS with Python, but there is only the function uniqueValues(fieldIndex) More specific: I have a postgresql table which is loaded into ...
2
votes
2answers
2k views

How to clip multiple raster datasets with county polygons?

The example below shows three raster (i.e. in black) and a single county polygon feature class. How can I clip/extract by mask the rasters by their corresponding county polygons (i.e. Edwards, Clark, ...
2
votes
1answer
334 views

Python script for Data Driven Pages to run a series of DDP at once?

I have a several different polygon shapefiles that I am using to create individual maps for each polygon within the shapefile. The layout is the same for each map, the only thing that changes is the ...
2
votes
1answer
503 views

Script for Editing TIN in Arcgis: modelbuilder works, when exported as script gives an error

Arcgis can give such a headache! I want to automate loads of small tasks, and so I need to edit empty TIN with python in order to create a full TIN. My srcript is giving errors, so I tried by hand to ...
2
votes
1answer
301 views

Is it possible to set a layer style (e.g. set the color ramp) before loading the layer using pyQGIS?

I am implementing a tool which allows an user to calculate some statistics with some data from the registration office. My question is, can I set some layer styles using pyQGIS? The analysis part is ...
2
votes
2answers
896 views

Conditional combining of multiple rasters to produce one output using Python?

I have two rasters for same spatial extent and need to compare both rasters cell by cell and produce one output raster. Each has 10 land cover classes. Based on those 10 classes the comparison should ...
2
votes
1answer
958 views

Importing QGIS core into Python on OSX

I am interested in learning how to write standalone scripts using QGIS. An answer to my previous question directed me to the PyGIS CookBook which has the following instructions for importing the ...
2
votes
1answer
361 views

How to implent a “maketrans” python function on field calculator

i'm traying to implent python string translate function at field calculatore http://www.tutorialspoint.com/python/string_translate.htm in order to fix hebrew imported from cad. here is the code - def ...
2
votes
1answer
259 views

Does ArcMap/ArcPy support creation of textElements using Python?

From what I can tell python at ArcGIS Desktop 10.0 cannot create new textElements nor GraphicElements. Yet, 10.1 seems to support the ability to at least create a clone, of a existing GraphicElements, ...
2
votes
3answers
1k views

How to access vector coordinates in GRASS GIS from python?

Is there a way to iterate over lines and their vertices using python? I'm new to GRASS GIS, and it looks like there are ways to read raster (for numpy), but I don't see a direct way to access ...
2
votes
1answer
268 views

How can i include program form (created in Designer ) to my QGIS plugin?

How can I include a form created in Designer in my QGIS plugin? And how to get controls values (textbox,label,etc)?
2
votes
1answer
552 views

How to add GDAL Programs folder to ~/.bash_profile

I have recently installed on Mac OS X Lion 10.7.4 the GDAL Framework 1.9 with Python bindings from [http://www.kyngchaos.com/software:frameworks][1]. I need to add the following Programs folder to my ...
2
votes
1answer
216 views

Converting 2D shapefile to Equal Area Projection?

I have thousands of shapefiles with coordinates in lat/long (-180 to +180 x, -90 to +90 y), that contain polygons of which I wish to calculate the area. I'm using the Python GEOS/OGR/GDAL API. If I ...
2
votes
1answer
211 views

Why isn't this Python calculation working correctly?

I want to label the source files for a unified shapefile, and there are three respective columns for each. If there is no value in the column, there is no data from that source; if there is a value in ...
2
votes
2answers
173 views

Exposing ArcInfo level liscenses to ArcView desktops via ArcGIS Server and custom python script tool

I have a script that uses an ArcInfo level tool. The script works great on my machine but uses an ArcInfo level tool which the ArcView users don't have. Is exposing these ArcInfo level tools ...
2
votes
2answers
448 views

Convert Georeferenced imagery to vector data using python

Are there any opensource tools I could use to take a projected georeferenced image such as a jpg with world file, that is UTM projection such as NAD83 and convert it into distinct vector polygons ...
2
votes
1answer
461 views

Converting x, y, zoom for Calculating tile bounds

i am working on calculating tile bounds lat lon from x,y,z tile coordinate. i have looked gdal2tiles code structure and i have found this good function: def TileLatLonBounds( tx, ty, zoom ): "Returns ...
2
votes
1answer
649 views

Looking for a pure Python method to convert Lat/Long To MGRS

Does anyone know of any packages out there that implement a pure python method to convert lat/long coordinates to MGRS coordinates? PyPi has a package, but it requires some c-extensions from ...
2
votes
1answer
3k views

How to create a list and append objects to it through a loop

Still struggling with this script. Now I need to create an arpy.AddMessage that says "Projected: with the list of feature classes that were projected in the loop" i.e. Projected: filename, ...
2
votes
2answers
806 views

How to set up a plugin repository for QGIS?

I am working with python plugins for QGIS.I developed my plugin and created .zip file including my .ui,.py and resources files.In order to incooperate this plugin into QGIS i created .xml file ...
2
votes
1answer
8k views

Python :ImportError: DLL load failed: The specified module could not be found

I am working on Python plugins for QGIS. I set my variables as PATH :=C:\OSGeo4W\apps\qgis;%PATH% PYTHONPATH:=C:\OSGeo4W\apps\qgis\python But when I try to run my .py file in IDLE I get an error ...
2
votes
1answer
148 views

Locate DTEDs from one layer that intersect a polygon in another layer

I'm new to the GIS world, and using ArcGIS 10, so please forgive me if this is a simple question. I have DTED files (level 2) that I have placed into a mosaic dataset, and I'm trying to determine ...
2
votes
1answer
467 views

Perform Multiply (Times) Function on Several Reclassified Rasters Using Python

I have several reclassified rasters (0 = snow cover, 1 = no snow) and I would like to use the multiply function on all rasters that have the same spatial extent. In ArcGIS 10 this function can be ...
2
votes
1answer
371 views

Search Raster Files from Folder that Have Same Spatial Coordinates Using Python

I have approximately 700 raster files in a single folder and I need to find files that have the same spatial extent and copy to a different folder. The raster files measure daily snow cover and ...
2
votes
2answers
130 views

Finding Two locations with a conditional search on DEM

I want to find two locations H difference in elevation between two locations on a DEM. Ex: point A and B are my output after search on DEM. conditions are (1)buffer R distance around point A and (2) ...
2
votes
1answer
380 views

ArcPy replaceDataSource to an SDE raster catalog error

New to Python! I'm trying to re-path a multitude of rasters currently the workspace is a folder, the intended workspace is a raster catalog in an SDE database - using the replaceDataSource method I'm ...
2
votes
1answer
356 views

Why does “takes no arguments” error propagate from Arcpy example?

I was attempting to run Setup_Customers_Using_Tabular_Data , I modified the paths to fit my environment but when I run the program I receive SetupCustomersByTable() takes no arguments (6 given) ...
2
votes
2answers
704 views

Convert CSV files into OSM with FME

I have a database which i've exported as individual csv files for each table. Below are some of the attributes which exist from two of the csv files: wayPointID linkID order x y z length ...
2
votes
2answers
381 views

how to calculate a field from a shp currently sected in a arcmap session using a Python script in ArcMap 10?

Hi I nedd to create a script in Python for use in ArcMap 10. This script must be able to calculate a field from the shp currently selected in ArcMap. Any ideas?, I'm new to Python so any code example ...
2
votes
1answer
503 views

How to determine area of pixel in meters with GDAL and Python?

I have a raster loaded in Python using GDAL bindings. I'd like to be able to determine the area of a pixel in meters although I'm not confident that the projection is in meters. On this page I see a ...
2
votes
1answer
541 views

Running C# code from a python tool (ArcMap 10)

It appears that the only way to copy individual rows of data while preserving GlobalIDs in code is by using C# or VB.NET. I need to run the C# code from the above link within a python tool, and I am ...
2
votes
2answers
867 views

Mapnik TextSymbolizer showing nothing above OpenStreetMap base layer

I'm trying to use Python to create a TextSymbolizer to display a trail name above the trail LineSymbolizer. Below this layer is the OSM base layer which contains its own data for that trail. I can ...
2
votes
3answers
1k views

Adding shapefile as layer in ArcMap via Python scripting?

I am trying to automate various tasks in ArcGIS Desktop (using ArcMap generally) with Python, and I keep needing a way to add a shapefile to the current map. (And then do stuff to it, but that's ...
2
votes
1answer
3k views

How to update feature class by iterating through values with branching?

I'm really struggling with getting this to work. Basically, I want my script to get the "newID" value and use that as a look up value. If the "newID" is found in the OldID list then do one thing, ...
2
votes
1answer
521 views

How do I group layers in Mapnik?

I might be thinking about this all wrong, but right now I'm using Mapnik's OGC Server, and using that WMS with OpenLayers. How would I group multiple layers (say country, water, state borders) into ...
2
votes
1answer
350 views

ArcObjects ITextSymbol.GetTextSize in Python revisited: usage with StartDrawing and FinishDrawing methods

I am using ArcGIS 10.0/ArcObjects and Python 2.6. I am trying to get the usage of the ITextSymbol.GetTextSize method correct. The syntax, as established in an earlier question, is: dblx, dbly = ...
2
votes
1answer
483 views

How do I access MPS Atlas from python in ArcGIS 10?

I'm having trouble finding documentation on accessing MPS Atlas features using python in ArcGIS 10. I need to be able to modify dataframe manager properties, swap map sheets, etc. Is it part of ...
2
votes
2answers
53 views

How can I import shapefile in python?

How can I import a shapefile in python? from PyQt4.QtCore import QSettings, QTranslator, qVersion, QCoreApplication from PyQt4.QtGui import QAction, QIcon, QFileDialog # Initialize Qt resources from ...
2
votes
1answer
54 views

Processing algorithm fails from Python script

I'm trying to write a Python script performing a geoalgorithm. What is surprising me is the following: I first test the algorithm by QGIS (2.8) interface. In my case, the GRASS interpolator ...
2
votes
1answer
36 views

QGIS crashing/failing when dissolving multiple shapefiles in a Python loop

I am using QGIS 2.10 (but I've also tried 2.8) to loop through all the shapefiles in a folder (those ending in .shp) and perform a dissolve function on each of them. However, when I run the following ...
2
votes
1answer
52 views

Execute ogr2ogr from python

I tried to execute ogr2ogr from python with this shell command: ogr2ogr.exe --config PG_LIST_ALL_TABLES YES -f "PostgreSQL" -append PG:"host=hostnamet user=username password=password dbname=dbname" ...
2
votes
1answer
56 views

different way to build qgis python standalone application

There seems to be 2 different ways to start a Python QGIS standalone script. The official tutorial is using : from qgis.core import * # supply path to where is your qgis installed ...
2
votes
2answers
70 views

Raster image thresholding using python

I would appreciate if someone could guide me for applying thresholding technique to input raster image using Python. I intend to extract impervious surfaces from a high resolution raster such as ...
2
votes
1answer
57 views

Looking to find (or build) a particular Python geoprocessing tool

So here is my situation: There is a large area (a wildlife refuge) of nearly 200,00 acres that we have loads of spatial data for, from habitat management projects from the past several years. My boss ...
2
votes
1answer
28 views

Redirect remote shell command output to ArcMap geoprocessing tool display?

I have a Python script that runs a shell command on a remote server (using the Fabric module). When I run the tool in the debugger, I see all the output scrolling, as the command can take hours to ...