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

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1answer
77 views

How do you duplicate a point within a shapefile using Python?

How do you duplicate a point within a single feature class using Python? I have a partial sample script below, but in a nutshell, I want to duplicate a point, copy it into the same shapefile, and ...
2
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0answers
90 views

How to sort a column in attribute table programmatically

Is there any way to sort ( alphabetically ) a column in the attribute table programmatically (without clicking on the column header) in QGIS ?
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0answers
177 views

ArcPy Multiprocessing 000714 - Working in Debug Mode

In an attempt to render an interactive window via matplotlib I am using an out of process script in a toolbox. If I debug the script, it is possible to step through and render the window as expected. ...
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0answers
42 views

How to snap dangling nodes with prescribed angle?

I have got a streets shape file, to snap the dangling nodes in ARCGIS. But, I have to snap only some nodes(of feature) with a prescribed angle (green node in the image, and the angle marked in ...
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43 views

Polygon parcel division in python

Is there an open source tool or module in python that does parcel division of polygons like in ArcEditor?
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1answer
135 views

Randomly choosing one from multiple fields in Field Calculator of ArcGIS for Desktop?

Using the Field Calculator in ArcGIS for Desktop, I want to randomly choose one field from a list of 10 fields (strings). The Excel equivalent, which is working, is: =INDEX(A2:J2;rnd()*10+1). How ...
2
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1answer
180 views

Python Error while installing Cartogram

I am quite new to GIS and qGIS especially. I would like to install cfarmers cartogram plugin. From what I understand, this has to be done manually - so I 've followed the instructions from ...
2
votes
1answer
40 views

OGR DeleteDataSource not working properly in Python

I have a small Python script which is supposed to delete a shapefile in case the file is empty. import sys from osgeo import ogr drv = ogr.GetDriverByName("ESRI Shapefile") ds = drv.Open(inData) if ...
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98 views

developer problem with PyQGIS

I am a QGIS developer. We have been modifying the source code of QGIS for several months and have done good work in QGIS version 2.1. After that we tried to do the same modifications for QGIS version ...
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312 views

Why does python reads only the no data value from GeoTiff file?

I had a number of tiff files with a country's map. They had different rows, columns or different projections etc. I needed to make them with same projection, spatial resolution and same number of rows ...
2
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1answer
57 views

Automating polygon mergers with python

This is the first real world python program am trying to write. I am trying to create a scrip that takes a shapefile that has n polygons with an integer formatted date (e.g. yyyymmdd or 6/24/2014 is ...
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54 views

how to make a list of features constructing the dissolved feature?

I need to simplify my road network using the dissolve function to remove nodes not occurring on the intersections. the following code is doing that. arcpy.Dissolve_management(self.address_cor_layer2, ...
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125 views

How to detect turns of a route?

I'm doing a Python simulation of a vehicle, driving along a specified path. I generate dummy GPS readings, that fetch the current position of the vehicle, with some randomized error added. After a ...
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1answer
218 views

Import error when utilizing QGIS's Python Init function

Based on the answer to Referencing Qt UIs external to plugin with python. I'm trying to utilize the "Layer Properties / Fields / Python Init function" to execute a file (test_file.py) that is located ...
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81 views

How to add nodes into graph

I'm new to qgis and in here I want to find a path between two selected points on the map(Roads-vector layer). The points are selected by the user, using mouse clicks. So here I used the astar ...
2
votes
1answer
197 views

How to change attributes with QGIS python?

I have this piece of code which I would like to use for inserting values into column. It does not throw an error, the changes are not written to the source (shapefile). from qgis.utils import iface ...
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684 views

Running x64 bit geoprocessing Python in Python IDLE 2.7.6 x64 error

I am trying to set the Python IDLE 2.7.6 x64 to run the arcpy module from ArcGIS x64 bit geoprocessing (10.2.2). I copied the file DTBGGP64.pth from C:\Python27\ArcGISx6410.2\Lib\site-packages to ...
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163 views

Convert a classification image to aggregated polygon in shapefile using gdal/python

My goal is convert a 2D numpy array to shapefile. The matrix results from a classification, so the numbers have a meaning. I solved my problem, but the solution is somehow involuted and complicated. ...
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121 views

Can't remove the little islands when creating a svg map with kartograph.py

I'm new to python and to kartograph. I'm using it to create a map of France, Italy, Portugal and Spain. But I don't want the little islands (mainly the French ones ), causing the generation of a big ...
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336 views

Split a Polygon that Crosses International Date Line, ArcPy [closed]

I have a lots of existing data in WGS-1984 (too much to manually edit). I need to split these lines and polygons by the international date line. More projection information: ...
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0answers
270 views

ArcGIS10.2 crash opening python window

I was trying to test the data management commends in python, yet arcgis crash every time I I try to open to python window. According this post, it is the python version issue. I do have other versions ...
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18 views

How to access annotation feature classes in ArcPy? [duplicate]

I want to batch replace paths in a series of .mxd files using Python. Many of the layers have moved and in some cases the name has changed or its dataset is different. I've written this code which ...
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214 views

Decompress a LZW-compressed GeoTIFF

I have a LZW-compressed GeoTIFF file and would like to split it into several smaller regional files and change the format to png. I tried to do the spliting with gdal_translate -srcwin. I only get a ...
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88 views

Compare line with next line in attribute table shapefile

I am making a python code for ArcGis 9.3. The aim is to compare the value of my field "ID_BV" at line l with value of field "ID_BV" at line l+ 1. And depending of the test answer i populate another ...
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1answer
130 views

Conditional SQL Query

I've been running a code that searches a desired field in a feature class and performs an specified SQL query based on whether the field is string or double. The variables are just temporary fillers ...
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154 views

Getting “Segmentation fault: 11” with ogr in Python

This is the code I'm trying to run: In [1]: from osgeo import ogr In [2]: datasource = ogr.Open('testdata.shp') In [3]: datasource.GetLayerCount() Out[3]: 1 In [4]: layer = ...
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118 views

How to detect broken hyperlinks with arcpy?

I have zero experience with python but am trying to search for broken hyperlinks in a large gdb (temporarily converted to a shapefile)- Used code from a previous question (Hyperlink broken path - ...
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2answers
213 views

How to trim strings in Field Calculator?

I am currently working on a County plat book and am in the process of prepping the "Owner_Nm" field that will serve as my annotation layer. I am trying to whittle down the owner names, based on ...
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80 views

Identify different networks inside a line shapefile

I'm dealing with a quite big line shapefile containing road tracks. The roads are connected to each other, creating distinct networks. These networks are independent and they are not connected to each ...
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314 views

Publishing ArcGIS geoprocessing service - upload custom python modules? [closed]

I have an ArcGIS geoprocessing service which causes problems when publishing to arcgis server. The python scripts behind the service are structured as a custom python module, in a folder with an ...
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0answers
84 views

QGIS: rotatable markers with offset from point

Im wondering, if its possible (in QGIS), to set a rotatable marker with offset from point, like in my example below. Any suggestion?
2
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1answer
230 views

QGIS Python Labelling [closed]

i want to label a point layer with those values exceeding a set of variables attribute table as follows 'loc field'(text),'a'(float),'b'(float),'c'(float) variables as follows vara = 5, varb = 3, ...
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145 views

How to display images as cross sections in 3d

I want to display a base map and several vertical cross sections in 3D. The base map image is easy to rectify as a geotiff. How can I also display the cross sections? The cross sections are at ...
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64 views

Using the geocode function with cursors

How do I use a cursor with a geocodeaddress function? I want to be able to: 1) read from a table 2) only geocode addresses(from table1) whose street number is not 0 using a cursor 3) then update a ...
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2k views

smoothing results from scipy griddata interpolatioin

I am using the griddata interpolation package in scipy, and an extrapolation function pulled from fatiando: import numpy as np import scipy from scipy.interpolate import griddata import ...
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0answers
265 views

Zonal Statistics using Gdal and Python

I recently came across a loop_zonal_stats function by @ustroetz found here: Issue Trying to create Zonal Statistics using Gdal and Python.. I am using a (single) polygon shapefile and a raster file to ...
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0answers
46 views

How to Complete ModelBuilder Process Quicker?

I've built a script tool in ArcGIS's ModelBuilder to collect parameters from the user and use them as arguments for another python script. The output of this script is a text file. The only GIS ...
2
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0answers
109 views

Write raster with its attribute table and symbology

I am classifying lots of rasters and I'd like to automate the legend creation and symbology displaying for easy manipulation. Here is the kind of raster I'm dealing with: library(raster) r <- ...
2
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0answers
52 views

Extract MultiValuesToPoints yields identical value for each band

I'm attempting to extract hyperspectral remote sensing data to a point featureclass using the ExtractMultiValuesToPoints ArcGIS tool. The value of each band (228 bands) should be appended as a field ...
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0answers
327 views

What causes Scripting Error 000714 in ArcGIS when using GetParametersAsText? [closed]

I am trying to create a script tool in ArcGIS 10.2 in order to incorporate into a model. The script needs to incorporate three inputs which i've built using GetParameterAsText function then setting up ...
2
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0answers
571 views

How To Export Selected Data Driven Pages to PDF?

I have a map book with data driven pages that shows the fire boundaries, roads, etc for our fire rescue department. I want to automate the process of creating individual mini map books for each fire ...
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488 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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0answers
244 views

How can I create random concave polygons for test purposes?

In the context of generating random test data using QGIS (in a shapefile): I can generate random, continuous (adjacent) polygons by first creating n random points using ftools and then generating a ...
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374 views

Finding coordinates from a nested grid as a numpy array

So this is a pretty basic question, but I'm trying to figure it out. I've written a script that allows a user to read in a raster and provide a cell resolution, and outputs the amount of cells ...
2
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0answers
208 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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0answers
130 views

Python scaling issues and possible subprocess conflicts?

I have always found such great analytical and programming expertise on StackExchange in the past that I hope you can help me. Background: I have a project that involves spatially joining and ...
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0answers
36 views

ArcPy: Distortion towards edges when exporting to TIFF [duplicate]

I am writing a function to zoom to selection (based on a criteria) and Exporting it to TIFF. The problem I am getting is that the when I load the exported TIFF image in Map, I am seeing distortion ...
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0answers
110 views

How to join attributes by location with command line

I would like to joint the attributes of 2 shapefiles by location but with a command line (linux). This feature is easy in QGIS but it is VERY slow. Is there a way of doing this with ogr or pyqgis ? ...
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0answers
45 views

Building Arc add-ins without needing to restart Arc [duplicate]

One of the things that annoys me the most with trying to use the Arc add-in wizard is that I need to restart Arc every time I want to test something. This is especially annoying if I've got syntax ...
2
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0answers
179 views

Python Script within ArcMap running GME Command passes a double forward slash when writing the log file

I thought I made some serious headway there today. My script works perfectly fine when run from a Python Shell, but in ArcMap, whether the script is run from the Python Command line, or within a ...