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

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Quick way to select by attribute and zoom to selection in QGIS

I need to visually control hundreds of points in a layer on top of aerial photographs. Using the attribute table, selecting (with column filter expression) and zooming manually is cumbersome - so I ...
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42 views

Importing tif image from PostgreSQL Database to webpage

I am trying to import tif images from PostgreSQL Database to my website. In the website, I need to make a button control which will open the images. I think I have to use Pyhton as a server side ...
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59 views

How to create a Shapefile of a subset of input features in PyQGIS?

I'm having some trouble applying my Python skills to develop some scripts in PyQGIS. For me it's far simpler to write it in ArcPy, but then again I wouldn't get that much satisfaction after finishing ...
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25 views

Create a list of affected tiles from polygon / Gridding a polygon

Given a projection, a zoom level, a grid definition and a coverage polygon - what is the easiest/fastest way to obtain a list of map tile indexes touched by the polygon? Are there any existing tools, ...
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51 views

Converting lat,lon & solar data in CSV to raster using Python?

I have a csv file with lat,lon and solar radiation data. I am trying to convert it to a grid/raster format so that it can be used with a raster population data set that is in ascii format. How can ...
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81 views

Printing layers with Python script and QGIS - refresh problem

I have got a series of layers to be printed (grouped by pair). I am using QgsComposerMap. I iterate over the groups to just show the layers of the current group, zoom to its extent et print it. ...
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84 views

Making shapefile from Pandas dataframe?

I´d like to construct a shapefile from a Pandas Data Frame using the lon & lat rows. I have got a csv file and I process it with pandas to make a data frame which is easier to handle Is it ...
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37 views

Creating a field calculator function that can cast string to a percentage value in a related field?

I am having issues trying to create a field calculator function based on a coded domain string parameter combined with a numeric field to obtain a percentage output. The example in question is as ...
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22 views

Automatically export a schematic dataset to a file geodatabase

I'm working with ArcGIS Schematics on a schematic dataset with several diagrams which requires quite a lot of manual editing. Since during testing Schematics managed to utterly destroy the schematic ...
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63 views

Qgis 2.8, gdal python scripts gives error at end of process

I am using Qgis 2.8.1 64-bit (Standalone installer) which also packages a number or other applications, like OSGeo4W Shell, Saga GIS et.c. In the OSGeo4W Shell I am encountering a problem with some ...
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30 views

Error 010240 when calculating mean of a list of rasters - Cell Statistics

I'm trying to calulate the mean value of a list of rasters but I am always getting the following error: RuntimeError: ERROR 010240: Could not save raster dataset to < value > with output format ...
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123 views

How to write features in file geodatabases (FileGDB) with GDAL and Python?

I am trying to copy features from a spatiallite database to a filegeodatabase. The target FileGDB already exists with the required feature classes. I am using the FileGDB-API 1.4 on Ubuntu and Python ...
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35 views

How to publish a IDW GP service with python in ArcGIS 10.1?

I know someone has ask a question about how to publish a gp service with python.And the answer is using arcpy.CreateGPSDraft. But My geoprocessing tool is IDW, and I find the return value isn't a ...
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47 views

Defining 'os' in geonode custom installation?

Can any body teach me how to resolve this GeoNode problem? I tried following Geonode's documentation on installing it in development mode which was successful however when I tried changing its default ...
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46 views

Looping over array of type float with interval of float (NDVI) using Python?

I am stuck with my Python Script. The case is, I have an array of floating numbers from 0 to 1 (NDVI values). I want to loop over my array with an interval/step of every 0.025. Every interval/step I ...
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71 views

mbutil export of mbtiles png files are all corrupt

I have an mbtiles file that I created with MapBox studio from a GeoTIFF source, and when trying to export the mbtiles with mbutil, all the images are corrupt, no matter if I try png or jpg. Has ...
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26 views

Uploading raster to ArcGIS Server dynamically

I am building an new web tool related to agriculture research, this tool is linked to another backend GIS process done in c# and ArcObjects. I want to find a way to visualize this backend output ...
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54 views

Error when kriging: “output variance prediction raster”

I am trying to run a python script for kriging, but keep getting a following error message. It doesn't make any sense as the output variance prediction raster is optional. The code: # Create ...
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54 views

Perfom SQL queries in Python and process the result

I query column names from a PostGIS table with following Python code: colnames = [] sql_getcolumns = "select column_name from information_schema.columns where table_name='shp2py';" ...
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63 views

gdal_merge.py import gdal error

normal Gdal utilities work. gdal utilities with .py extension do not. they had worked very recently, within the last two months. checked the path variable and python version called from the command ...
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44 views

arcpy fails to retrieve queried data from a layer using arcpy.da.SearchCursor

I am attempting to retrieve rows of data from an attribute table using arcpy. I have used a definition query on the data in ArcMap so that only one feature is present in the attribute table. I then ...
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48 views

How to customize and add additional features in GeoNode

I need some advice on how to start customizing my GeoNode installation. I tried reading up on GeoNode documentations on how to do it but it always boils down to customizing or adding to the Django ...
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63 views

UpdateCursor not iterating as desired, updating erroneously

(EDIT BELOW WITH WORKING CHANGES) I have a script in which I am trying to compare attributes in row n to row n+1. If all the attributes match, I want row n+1 to have a field ([Modifier]) updated to ...
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47 views

ArcGIS creating individual layers for unique attribute in a given feild. Limitations of Where Clause

I am putting together some code that makes a layer for each unique attribute within a given field. So if I had a shapefile that contained point data for locations of say postboxes in every city , for ...
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44 views

Arcpy MakeGraph “Parameters are not valid”

I have a Python add-in that should create a graph based on the location ID of a water quality testing station. The user clicks on the point and a relevant graph should be created in the layout window. ...
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76 views

how to compile a python script (proxy.cgi) in ubuntu?

I want to know please how to compile a python script ubuntu 14.10, I have a file proxy.cgi I want to compile in order to access to the geoserver. when I type localhost/cgi-bin/proxy.cgi, it displays ...
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58 views

Python error in array declaration

I am getting a error as follows File "C:\Program Files (x86)\ArcGIS\Desktop10.3\ArcPy\arcpy__init__.py", line 2292, in NumPyArrayToRaster return _NumPyArrayToRaster(*args, **kwargs) ValueError: ...
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30 views

Never get the information about obective interpollation and optical interpollation

I have point data want to interpolate it and convert it into 3d grid format but i am not get any proper information which interpolation i have to used objective / optical. please let me know any ...
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81 views

Not matching schema problems when appending a list of CSV's into an existing FGDB table

So far I have the following code for creating the FGDB table and defining fields which works just fine. But when I try to append a list of csv's to this table I always get a matching schema error. Do ...
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38 views

What driver should I use when trying to open a Geospatial PDF with OSGEO and Python?

My code is as follows: from osgeo import ogr from osgeo import gdal dso = ogr.Open('myfile.pdf') print dso dsg = gdal.Open('myfile.pdf') print dsg driverGeoPDFogr = ogr.GetDriverByName('PDF') ...
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37 views

Python script can't find custom module in ArcSDE

I've been working on a python script for some time. Its working well but I'm having trouble running it in SDE. My main issue is that the python script, when run in SDE, cannot find any of the ...
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97 views

Get min/max value of each band from landsat image?

I am trying to get min/max value of each band from Landsat image with the following code. from osgeo import gdal raster = "raster.tif" # load raster gdalData = gdal.Open(raster) # get number of ...
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40 views

Import addresses from an Excel file via Python for route optimisation

relative newbie here. Apologies if this is very obvious or basic! I have created a route optimisation model through ArcGIS modelbuilder, then exported the Python script. Within the model I had a ...
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47 views

Geoserver WPS process chaining raster clip and zip with python

i am using geoserver 2.6, i want to apply clip and zip functionality of raster data with using python script and implementing wps client. So, what is parameter should i use in python script for clip ...
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64 views

QGIS 2.8.1: crashes with standalone install of python

I have QGIS 2.8.1 installed, as well as python 2.7.4. Qgis is crashed on the 'python load', if it can find the folder for python. If it change the folder name of 'python', it will use its version of ...
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137 views

ST_MakePoint returns an error when using Python

I am trying to use ST_Point or ST_MakePoint to create points from a table of latitude and longitudes coordinates. However I am consistently getting an error even when trying the examples. For example ...
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46 views

Search Address (Geocoding), Analyze intersecting underlying layer and return text results

What would the process be for going about accomplishing something like this via a website. Say I just wanted a website form where the user would input their address. Then beneath the scenes it would ...
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79 views

Making QGIS custom form modal?

I have created a custom form for entering attribute values for newly added features / editing attribute values for existing features of a shape file. I chose the ui file as "Edit UI" and a python file ...
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58 views

How to raise exception from if statement in Python

This is a general python question, I would like to write a function that essentially states if data is available do this, if not raise an error, and a finally block which does something else. In ...
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87 views

Is PyQt4 'drag and drop' functionality available in Qgis Plugins?

In Qgis 2.8, is it possible to use the PyQt4 drag and drop classes (dragEnterEvent, dropEvent) to interact with items from a qtreeview, in a Python Plugin? Is it possible to hook into the ...
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31 views

How can I create text using Python in ArcMap 10.1

I am using data driven pages to create a map book and I want to create the neighboring labels. Is there a way to create the label with a background? And when there is a NULL value in the attribute ...
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45 views

Optimizing shapefile lookup time?

So, I have a ~1GB shapefile which is running circles around a ~5MB shapefile when it comes to feature look-up time (using python, with GDAL): def check(name, lat, lon, attributeFilter:'SQL ...
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246 views

Interpolation using GDAL

I am looking for some hints here. There is a shape file with point data of rainfall sampled at a regular grid, and there is a shape file with point data of soil attributes sampled at a regular grip ...
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113 views

How to import osm.pbf file into database with Python Imposm

I want to import a .osm.pbf file with the Python library Imposm. Currently my work flow is the following: import requests import os city_name = 'santiago_chile.osm.pbf' url = ...
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62 views

Calculating distance from PointGeometry object to polyline in arcpy

I created a PointGeometry object on ARCPY and I'm trying to measure the distance from that point to the closest point on a polyline table.. The PointGeometry object has an easy function for that ...
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91 views

Spatial Interpolation/Resampling of Point Surface Data - Axes @ Different Resolutions

I have a simple set of data points in x,y,z format. This was data collected from a ground penetrating radar over a physical distance of: 45m x 25m With a resulting grid of: 90 x 100 (9000 points) ...
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37 views

Stopping a route using attributed length

I am working in a project where I need to run routes from several points on a route network and have them stop at a specific length. I have worked out their max distance want to use this attribute to ...
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52 views

Mapserver Python Mapscript - Is There An Equivalent to Mapnik's Python Plugin?

I have been developing a sophisticated web mapping app using MapServer in conjunction with the Python MapScript bindings - and it has been working great. However, I am thinking a custom data provider ...
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42 views

Bulk Converting Ordnance Survey to Google Map lat lng

Apologies if this is a simplistic question, I am learning! I am attempting to use pyproj with Python. The coordinates I wish to convert came from the Ordnance Survey Integrated Transport Layer. I ...
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44 views

Programmatically Add Layer Definition Files (QGIS Python)

I would like to add the same Layer Definition File to QGIS desktop multiple times with a Python script rather than having to make multiple clicks each time I want to add that layer. Can someone ...