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

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210 views

Create vector grid from canvas using script

I've modified "Hex grid from layer bounds" script to my need. Just added cellsizex and cellsizey. Changed the hexagonal - 3 to "1" to make it as a square grid. Is it possible to include an option to ...
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84 views

ArcPy: Initialize zero valued grid Raster and iteratively increment

I'm jumping right into ArcPy to help out a friend who needs to automate some ArcGIS work. The problem at hand can be reduced to the following pseudocode: accumulationRaster = SomeZeroedRaster for ...
3
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511 views

QGIS API - Print Composer Template produces empty map?

I have a print composer template which I'm trying to populate with different subset queries from a CSV-derived vector layer using the Python API. However, all the output PDFs contain everything except ...
3
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0answers
82 views

How to find the minimum number of inspection points?

I am working on a pipeline inspection project and there is a high liklihood that some inspection tool deployment/retrival station will need to be installed on the pipe network. the problem is ...
3
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160 views

PyQGIS: How to color raster layer with existing colorBrewerMap

With pyqgis I have added multiple new raster layers to the legendinterface(). Because i like the ColorBrewer style i want to color some of them with the "Spectral" gradient. How can I do this in ...
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192 views

python equivalent of spatstat's spatial point process functions

Is there a free python package (i.e. PySAL?) that implements the standard summary statistics for spatial point processes, e.g. the F, G, J, and K functions? I'm happy to use R (i.e. spatstat) if ...
3
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174 views

Calculate size of area where data values exceed certain limit

I am using Python and Basemap to plot sea ice concentration within the Arctic region. I need to calculate the total area (square meters) where the sea ice concentration exceeds a certain limit (e.g. ...
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254 views

Accessing existing instance of qgis from stand-alone python script

For my own data analysis pipeline, I am running a split screen setup with iPython notebooks on one side, generating variables from source data, pushing them to a csv file which qgis then reads/joins ...
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209 views

Generate tiles using GPU

I was wondering if anyone has tried already to utilise the GPU in tile generation? I have a quite big dataset so tile generation takes a while (especially on high zoom levels) even on a quite high ...
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688 views

Is there a way to execute FME transformers from a PythonCaller script in an FME workspace?

I have a very large and complex Python/arcpy script that does lots of custom calculations, and I am trying to port it to an FME environemnt. The script runs beautifully under ArcGIS. The problem in ...
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188 views

Handling non-spatial data for QGIS projects with Camelot

Most of my projects include data which is non-spatial or which is point data and can be managed by a regular relational database. Previously I found Manifold and ms-access were a good combination ...
3
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256 views

python.multiprocessing and “FATAL ERROR (INFADI) MISSING DIRECTORY”

I have a question which is closely related to this old question here: python.multiprocessing and "FATAL ERROR (INFADI) MISSING DIRECTORY" I have also looked at this, which seems to relate ...
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490 views

Buffering a Raster with GDAL and Numpy

I am using GDAL to convert a raster dataset into a numpy.array and then using numpy to buffer the data in the raster. For example, I need to know all the regions within 100ft of a school point ...
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247 views

How to create a Typographic Map with Mapnik

So i am trying to make a typographic map using mapnik. I want the street names along a particular street not to overlap, but I want an intersection between two streets to over lap. Currently some ...
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383 views

Is there a Python WMS client (thin client analogue of OpenLayers)?

I'm making a geoportal based on (Geo)Django 1.5, PostgreSQL 9.1 + PostGIS 2.0, QGIS MapServer and OpenStreet Map or Google Maps WMS services for the base layer. It seems like there is no problem, but ...
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531 views

Configure Python with Geoserver

I am developing a WebGIS application with: Openlayers 2.12 PostgreSQL 9.2 with PostGIS 2.0 extension Geoserver 2.2.3 Apache 2.0 configured with Tomcat 7.0.35 PROBLEM One of the services of the ...
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524 views

ogr.GetDriverByName('FileGDB') returns None

I installed: gdal-110-1600-x64-core.msi GDAL-1.10.0.win-amd64-py2.7.msi gdal-110-1600-x64-filegdb.msi from www.gisinternals.com I can open my gdb on the command line: C:\data>ogrinfo ...
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536 views

Create easy Annotations from point features with python in ArcGIS 10.0

Because in ArcGIS 10.0 there is still no simple toolbox function to convert labels to Annotation, I try to go a substitude way with the callable Toolbox function [TiledLabelsToAnnotation][1] on a ...
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141 views

traversing KML files with ogr python

i'm new to OGR processing and KML format so be gentle: i've got a series of KML files all containing multiple regions partitioning a larger area in each. i also have a series of geocoded points for ...
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478 views

Importing matplotlib basemap and shapely

I'm not sure if this is the right place to ask this, but here we go. I have a python script that uses matplotlib's basemap and another part that uses shapely to do an intersection of 2 polygons. If ...
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242 views

How to merge SeaWiFS and MODIS data or use other merged products?

I hope to produce a time-series for sea surface temperature (SST) and chlorophyll-a (Chl-a) for use in MaxEnt without the use of arcgis, preferring Python tools to others. I am new to satellite data ...
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80 views

Adding points to represent non-chosen locations

I am looking for a way to set up a discrete choice model in ArcGIS for foraging behavior of individuals, in a grid of 15 locations. To do that I need a point for every possible choice they could have ...
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219 views

Setting border-style to 'no pen' using QgsGraduatedSymbolRendererV2

I am developing a QGIS plugin that, after a series of inputs, will produce a thematic map using the QgsGraduatedSymbolRendererV2. Because the polygon are very small, the boarders make it such that ...
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144 views

How to change the QGIS help dialog?

I am working with python plugins for QGIS. I am done with my one of my .py file using python 2.5 and pyqt4. It is just help file for QGIS, which i changed. I wanted to incorporate the same in QGIS. I ...
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15 views

Match polygons of two independently created shapefiles to create dataframe

I have two independently created shapefiles A) shapefile 1 lists the german postal codes and can be downloaded from ...
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18 views

Reading raster attribute table using gdal in python

Is there a GDAL function that can read in a raster attribute table? Something functionally similar to this function in pygeoprocessing: ...
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0answers
35 views

How to use ST_VoronojDiagram for points that are almost aligned?

I am trying to use the spatialite ST_VoronojDiagram function on a table containing four 4 points that are almost aligned: (1.01 2.02, 2.02 3.03, 10.01 10.02, 11.01 11.02). I wrote the following script ...
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27 views

QGIS Function Editor/ Python question

I'm currently using the layer_property(layerName,'source') to produce a list of copyright statements for the Print Composer by putting that in an if() statement. However, that isn't very flexible as ...
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0answers
49 views

Deployment of optical fiber QGIS Python

The subject that I’m working on is the deployment of optical fiber . I have a shapefile which represents a country containing homes. And I have another shapefile representing an infrastructure plan of ...
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0answers
18 views

Writing 3 channels to 8-bit TIF in Python using gdal

I have some Python code to write 3 channels to file. Here, channels is an array of 3 numpy 2D-arrays (RGB), outfile is the filename, and rows and cols are the image dimensions. def ...
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0answers
49 views

Use QGIS API on standalone python program without install the entire application

I developed a standalone python program that makes use of QGIS API to create .qml files from sld files. This is a small program of about 15 lines of code that imports the following modules and uses ...
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18 views

Open QGIS project files in exclusive mode / alert if project file already in use

I have QGIS-Project-Files saved to a network drive and was wondering if it is possible to warn users that a project file is already opened by an other user to prevent concurrent editing of the same ...
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35 views

How to use GDAL RasterizeLayer (python binding) -where flag

I am trying to use GDAL RasterizeLayer python binding, but I can not find a way to use the -where flag. The 'pure' GDAL command I am trying to run is: gdal_rasterize -b 1 -burn 0.00001 -where ...
2
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0answers
25 views

QGIS Override MapTool Python

My goal is to reuse the default edits tool of QGIS in a custom App. But I would like to modify some behavior with those tools. For instance, the MapTool beside the Edit Node Action. ...
2
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0answers
29 views

How to run QGIS plugin from python script

I would like to access external QGIS plugins through a python script. I have been able to access the built in QGIS processing and vector toolbox, but have been unsuccessful with external plugins such ...
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0answers
94 views

Is it possible to query/download satellite images with Python?

I was wondering if there exists a Python library/API for downloading satellite images. Ideally, I would want to enter the latitude and longitude of a bounding box and get a high resolution image ...
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0answers
26 views

How can I change the labels in the console output in Google Earth Engine?

This is the second part of my edited two part question (first part here). So I used the following script: // define the var var Catchment = /* color: 98ff00 */geometry; var landcover = ...
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0answers
31 views

Apply QChainage based on field value

I'm quite new to QGIS and found the great plugin QChainage. Simply put, it allows to create points along lines. There are different modes available. Create points every X meters or Divide the line i ...
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0answers
79 views

gdal/python: tif not recognised a supported file format

I'm trying to open a tif using gdal, read it as a array, do some math, and write it back as a tif. However, when I try to gdal.Open(tif) in python, I get the error: RuntimeError: ...
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0answers
50 views

Show attribute table in the form (table of contents)

I am building a plugin in a new window with table of contents associated. I have some actions, for example, zoom to extent and others and I want also to show the attribute table. I search and find ...
2
votes
0answers
64 views

Setting extent with python in QGIS in new project

Situation: I am trying to write a simple python script for QGIS. The script aims to load one layer, zoom to given coordinates, and 'place a pin' there. The coordinates will change every time I run the ...
2
votes
0answers
58 views

Geopandas and Zonal Statistic error

I'm trying to use Geopandas and zonal statistic from rasterstats together. I run this code import geopandas as gpd from rasterstats import zonal_stats geodf = gpd.read_file("SHP/shape.shp") ...
2
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0answers
78 views

arcpy.AddIndex_management error for in_memory variable

I am trying to optimize a script that uses addJoin_management. To do this efficiently, I am attempting to add an attribute index on the join table. I am getting a generic error when i do this though. ...
2
votes
0answers
71 views

Altering legend labels in Matplotlib

I have a choropleth map which displays crime percentage change. It is plotted from a geodataframe and the choropleth intervals are determined in the background by Python. Unfortunately, the first ...
2
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0answers
76 views

arcgisscripting.ExecuteError: ERROR 001270: Consolidating the data failed

I am working on PuTTY and trying to create service definition file in server. My Python script is creating .sddraft but I am receiving 'Consolidating the data failed' error when I run stage service ...
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0answers
27 views

QGIS plugin window qt creator formatting ineffictive

I am developing a QGIS plugin. I have assigned the QGIS main window as the parent window of custom plugin using: QtGui.QDialog.__init__(self,iface.mainWindow()) But after doing so the problem ...
2
votes
0answers
142 views

NetCDF to Shapefile with Python and GDAL?

I need to save my outputs, which are netcdf files or panda python tables, to shapefiles. They cannot be rasters because the software I am loading them into accepts shapefiles only. I have googled ...
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0answers
65 views

Button to run Python Script on Custom Form Open QGIS

I'm very new to QGIS and Python (although years ago had some programming experience with C++), but have been muddling through with a fairly large project cataloging cemetery plots at the moment. I ...
2
votes
0answers
33 views

QGIS, add a layer (shapefile) to a running QGIS from an external application

I'm trying to load a shapefile as a new layer into a running QGIS application using python within a Windows command shell. The python is basically what is explained in this post: How to open a layer ...
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0answers
60 views

Regridding vector values

I'm trying to regrid and interpolate vector values from WAM model output. I got WAM model netCDF output in rotated grid, I need to interpolate it to another grid which is some variant of LAEA ...