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

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QGIS get the X and Y of a raster file by click

I have a raster file (Geotiff) and try to write a plugin that can change the value of one cell in a raster (== array cell). I know how to get a QGIS point but how can I get the array index from on ...
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331 views

Updating Multiple Fields in Feature Class from a Table

I have a Point Feature Class with 2 million records with 35 fields. I have another csv file (contain 25 fields) which have around 4000 records to update certain records of the Point Feature Class . ...
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211 views

Download file from network using PyQGIS 2.x

I have a python plugin targeting QGIS 1.8 that uses QgsNetworkAccessManager and QNetworkRequest to issue a GetCapabilities request to WMS servers. With 1.8 everything was working fine. Now we are ...
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182 views

How to call default tool in QGIS inside plugin using python script?

I want to create a plugin which can draw irregular polygons in QGIS. For that, I want to call the Select features by freehand default tool inside my plugin. How can I do this within a python script?
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377 views

QGIS (2.6.1) Processing Toolbox InitGui error after changing /Users folder on Mac OSX

Using: Mac OSX 10.9.4 QGIS 2.6.1 I had previously installed QGIS and had everything running fine. My home directory was /Users/rowanbado, but for another application I had to add an ...
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33 views

Creating ArcGIS tool that can run list of checks?

Is it possible to create a tool in Arcmap where by uploading a shapfile, the tool can run a various number of checks/tests (ie intersecting other shapefiles) and flags or highlights conflicting ...
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148 views

How do I properly import python sklearn to QGIS PyQt plugin?

A bit of background: I'm somewhat new to python and QGIS plugin development. I've created a plugin structure for QGIS using the Plugin Builder on QGIS and I've added some controls to the gui and ...
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677 views

Grass 7 on Ubuntu 14.04. Can't start Grass

I attempted to install GRASS GIS 7 on ubuntu 14.04 using these instructions. When I call grass70 from the command line I get a welcome message and a prompt to continue. I then get two error messages: ...
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56 views

Keeping dev scripts in sync with projects

How do you keep your development scripts in sync with your source code management (SCM) and your projects? For instance right now I have things like D:\code\reusable-stuff that goes to an SCM (e.g. ...
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445 views

Get Path of File found with os.walk [closed]

I am trying to expose the full path of a file found using os.walk. The walk function is working correctly and is exposing all the files I want however when I try to get the path it looks like it is ...
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2answers
459 views

How to calculate the Oriented Bounding Box (OBB) of a polygon or point set?

I'd like to calculate the "Oriented Bounding Box" (OBB) which is the enclosing rectangle aligned to the longest extent of a point set (which is not necessarily aligned with the axes of the co-ordinate ...
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104 views

How to search by attribute using each row with Python?

I am trying to write a script to select each individual neighborhood using one FC, then use select by location to see the number of lots from another FC that are in the neighborhood and store that ...
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61 views

Field Calculator Python Issues [closed]

How can I adapt the following expression in the ArcGIS field calculator? Below is the python code: import arcpy fc = "2014_2" keyField = "ID_segment" affectedField = "KKN2" maxVal = 2500 cnt = 1 ...
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225 views

How to get GML layer CRS with OGR Python?

I have a GML layer obtained from a WFS that looks like this: <wfs:FeatureCollection xmlns:ms="http://mapserver.gis.umn.edu/mapserver" xmlns:wfs="http://www.opengis.net/wfs" ...
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358 views

How to link my QGIS plugin main class to mouse events from a custom Tool?

I Have two files one is mouseevent.py and the other one main.py. class MouseClick(QgsMapTool): canvasDoubleClicked = QtCore.pyqtSignal(object, object) def __init__(self, ...
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435 views

problem with adding 64-bit background geoprocessing to ArcGIS 10.2.2

My code written in python language using Arcpy works perfectly with small to average size datasets; however, with a big dataset, the script stops in the middle of execution which most likely is due to ...
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1answer
191 views

Restrict text widget to only integer between 0 and 999 in IntraMaps Roam

I have created a form and added an attribute as a Text widget in the Roam manager. Now I'm trying to restrict the input to be an integer between 0 and 999. I want the field to stay "empty" (or ...
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2answers
237 views

How do I convert a GeoTiff's neatline metadata from vector format to pixels using GDAL?

I have a GeoTIFF that produces the following when run through gdalinfo: Driver: GTiff/GeoTIFF Files: PAA_1.tif Size is 14400, 6600 Coordinate System is: ...
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349 views

Loading Oracle Spatial Layers in standalone python qgis

I used below script to connect to postgres and load layers successfully.I want to aceive this using Oracle Spatial for both vector and raster loading.How can I achieve that?In other words what is the ...
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854 views

Write GeoJson into a .geojson file with Python

I want to write a geosjon object with the type <class 'geojson.feature.Feature'> into a .geosjon file. Therefore I tried to use with open(test.geosjon, 'w') as outfile: ...
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2answers
86 views

How can I disable logs being created in standalone python script?

When I run the following script in QGIS 2.6.1, it produces a folder called 'processing', which contains a log, in the directory it reads files from. And since the script reads files from several ...
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248 views

How to add fields to shapefile from standalone script?

When I run the following script via OSGEO4W64 Shell, I receive the following error when trying to run the qgis:fieldcalculator algorithm: 'NoneType' object has no attribute 'mapCanvas' I read ...
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173 views

Use r.mapcalculator in Python console

I'm trying to use the r.mapcalculator algorithim in a python script, but I'm having problems in using the r.mapcalculator to tranform a raster layer with float values into integers. Using the ...
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1answer
238 views

Use field calculator to reclassify values from three different fields to populate a new field AND determine overlap with different raster

I want to reclassify values of 3 different fields AND determine if one of those fields is located inside a different polygon to populate the values of my new field. Everything is raster. I created a ...
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110 views

Unable to find either renderd.py or generate_tiles.py

We created a Ubuntu 14.04.1 LTS x64 OSM tile server from packages using the excellent instructions provided by http://switch2osm.org/serving-tiles/building-a-tile-server-from-packages/ The tile ...
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186 views

How to update projection of layers in Geoserver using gsconfig

Im using following code to find projection of layer from geoserver.catalog import Catalog cat=Catalog("http:// localhost:8080/geoserver/rest") myResource = cat.get_resources(store='storeName', ...
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63 views

How to use gdal's “forceToLineString()” with Python

I'm working with Python and GDAL and I'm quite new to this ^^ For my script I'm looking for a method to convert a MultiLineString into a simple LineString. Example: MULTILINESTRING ((0 0,0 1),(0 1,0 ...
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1k views

QGIS 2.6 python PlugIn Error : NameError: global name 'QMessageBox' is not defined . any idea ? this use to work in QGIS 2.4

I am wondering why is this code not working ? def run(self): QMessageBox.information(self.iface.mainWindow(),"Ok", "You pressed F7") NameError: global name 'QMessageBox' is not defined ...
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293 views

PyQGIS export to JSON: writeAsVectorFormat and precision

In my QGIS plugin qgis2leaf I am exporting all layers as JSON into a JSON directory. Therefore I would like to enable the user to define the precision in the GUI. The normal "save as" dialogue in QGIS ...
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187 views

In qgis using python, how can I get multiple pixels from a raster based on a vector point file

I just started working with qgis, and for the life of me I cannot figure out how to solve this problem: I have several points of interest, these are stored in a shape file (just simple points). I ...
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113 views

copy only selected with CopyFeature_management

I am trying to test if each feature of a feature class list intersect each feature of a shapefile (clip layer). I'm working with arcpy in ArcGIS 10.0 The arcgis desktop help says that if the feature ...
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272 views

Arcpy addin editable textbox on tool bar

I would like to add an editable toolbox on an arcpy addin toolbar. This would be used to change values of a threshold but I don't think this is currently available. (What I would really like is a ...
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231 views

What is a OGRGeometryShadow and why can't I use it in Intersects()-method?

I'm trying to script something with Python and GDAL/OGR and Shapely. What I have: two LineString geometries: "geom1" and "geom2" I made an Intersection: "intersection = geom1.Intersection(geom2)" ...
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275 views

Python buffer in a line using GDAL

I am trying to make a buffer from a line using gdal. I use the example in the gdal Cookbook import ogr, os def createBuffer(inputfn, outputBufferfn, bufferDist): inputds = ogr.Open(inputfn) ...
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240 views

How to label line features using python code?

I used the following code to label the line features(roads) in a layer.It works in the console, but not by python code(application) It works for the points too. What did I do wrong? Any help would be ...
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675 views

Get shape file polygon attribute value at a specific point using Python (e.g. via PyShp)

I have a shape file comprising multiple polygons. These polygons have attributes. I am trying to write a script in Python that takes a co-ordinate point, determines in which polygon it falls, and ...
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1answer
376 views

Running GRASS functions in QGIS 2.4 from python console

I am using qgis 2.4 and i am looking for the "easiest" way to execute e.g. the r.in.gdal function from the python console in qgis. Specifically for r.in.gdal, I could not found this function in ...
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347 views

Use PyQGIS to import CSV and draw points using different color

A CSV file contains columns latitude, longitude and color. uri = "file:///C:/data/balls.csv?type=csv&xField=longitude&yField=latitude&spatialIndex=no&subsetIndex=no&watchFile=no" ...
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1answer
119 views

slow Python script pulling from an iSeries database

I've converted and updated some python scripts that exported data from an iSeries database (HTE) to Access to export the same data to a fgdb. My biggest issue is the time it's taking to export the ...
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3answers
430 views

Export selected fields in ArcGIS to Excel using Python

I'm am creating a script that will allow a user to add XY coordinates to a point layer, then export (along with any addition user selected fields) to Excel. I am getting stuck on the iteration of the ...
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2answers
622 views

Writing Python script in Field Calculator in ArcGIS Desktop?

I'm a programmer, I have programmed in C#, Java, but not with Python. And I'm not a geographic worker. How can I write a python script into Field Calculator to be able to check the other column value. ...
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385 views

Copying XY to clipboard using Python Add-In (ArcMap)

I am trying to create a simple tool to copy XY from where i click the mouse button. What i have done already is: create add-in files using Python Add-In Wizard create toolbar and tool inside it in ...
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1answer
132 views

Properly writing floats to feature properties of a new shapefile in Fiona

The following piece of code returns a shp following the driver and crs of a model .shp. import numpy as np #just to test I correctly handle data types import fiona from shapely.geometry import ...
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85 views

Is it possible to read shapefile field aliases values using fiona?

I am using fiona to read a shapefile, but not sure about how to get field aliases. Is this possible using this great library?
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235 views

Flip multiple vectors

I have thousands of vectors (out of several million) which I need to flip, for directionally purposes (Network Analyst). The vectors in question are annotated that their directionality has been ...
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2answers
576 views

Open Source solution to batch process shortest distance between points along road networks?

I have the locations geocoded (a fairly small dataset, ~200), but I haven't found a straightforward way to load these data into QGIS and perform network analysis between nodes. Any suggestions? ...
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131 views

Why does QGIS 2.4 prematurely terminates on startup at “Starting Python”?

After reinstalling Python (3.4) as well as OSGeo4W and the QGIS Standalone, my QGIS always crashed when "Starting Python" on my Windows 7 64 Bit environment. It simply did not proceed to the QGIS-GUI ...
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252 views

Calculate azimuth of vector for QGIS 2.0 Python plugin

I calculate the azimuth of a vector and update a field in my QGIS 2.0 Python 2.7 plugin. This works currently, but it takes much longer than i'd like to. I believe it is because i'm querying the data ...
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20 views

Feature Layers for Subsets

I need to create a subset of data based off their distance from particular points in ArcMap. Is it possible to create Feature layers that have a defined buffer, that only show data within that buffer? ...
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280 views

Esri Python Toolbox(pyt) corruption in ArcToolbox.dat

Symptoms: Open ArcCatalog and all tools within Python Toolbox(pyt) have a red-x error next to them claiming that "Arcpy module has no attribute Parameter" Close ArcCatalog Delete ArcToolbox.dat file ...