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

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2
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1answer
198 views

Select and zoom python script

I am attempting to make a simple select and zoom python script for my address points. Currently the script will complete successfully but will not select or zoom to the entered point. I am using two ...
4
votes
1answer
363 views

How change border line to no pen with python console?

From Python console I load a shapefile with qgis.utils.iface.addVectorLayer. How I can remove border lines (change to no pen) in the active layer?
6
votes
2answers
222 views

Add raster paths to shapefile with python (ArcGIS)

I have a problem and maybe someone is able to help me or give me some hints how to start. Situation: I have a lot of raster and of every raster I have the center coordinate. Out of this coordinate I ...
3
votes
1answer
77 views

Python program for “Comparing total number of pages of an mxd to total number of PDFs created from that mxd”!

I need some help on my program. I have the parameters set to ask user to pick an mxd and the folder where those data driven PDFs are located. I started with Search Cursor to create a list from the ...
8
votes
2answers
1k views

How to buffer a vector shapefile using ogr python?

I am trying to learn how to use ogr in python using the country and populated places datasets from http://www.naturalearthdata.com/downloads/50m-cultural-vectors/. I am attempting to use filters and ...
4
votes
1answer
370 views

Arcgis Stop Working with my Loop Scrip (Could Be Memory)

I am having issues with my scrip, because it makes my computer very slow after 15 loops arcgis 10.1 and explorer.exe crashes. But instead of this, i can see my 15 pdf files saved correctly and i need ...
4
votes
1answer
320 views

Slow performance on splitting a shapefile by attributes

I've tried to develop some workflows with the ArcPy module for splitting a shapefile based on the unique values in a specified field. The code works as expected except one thing I am not able to ...
2
votes
0answers
378 views

Multiple ring buffer on point-shape error

I need to calculate multiple ring-buffers, but every time I try, arcgis produces a failure: Executing (Multiple Ring Buffer): MultipleRingBuffer Y:\GIS\RDY\clip\sn_clip.shp ...
1
vote
1answer
185 views

can't generate/display signed float values using python/gdal

I'm trying to create a raster with signed float values as the pixel values and display the results in MapWindow on windows. What is the proper gdal band type to use? I've tried both gdal.GDT_Byte ...
4
votes
5answers
960 views

Python loop Polygon to raster not working

I want to convert a large number of different shp polygons to raster in ArcGIS 10.1, using an existing field column "class" for the new raster classes. I am not very fluent in python but I thought ...
1
vote
1answer
198 views

calculating terrain elevation line

I found too many hits on the web to even see the right direction to go. I have to provide a small proxy server serving requests for a line of terrain elevation data between two coordinates. It is a ...
5
votes
2answers
364 views

Exit Python script in ArcGIS 10.0

I have a script with an bail-out function like so: def die(): from sys import exit exit() Occasionally in the script I check a condition and exit if necessary. This works great in 10.1, ...
2
votes
0answers
120 views

Convert geojson labels MBR to MapInfo text object

Im using Dymo (https://github.com/migurski/Dymo/) to generate automatic point labels placement. The output of Dymo is a geojson containing MBRs of the positioned labels with the names of the labels in ...
5
votes
1answer
148 views

Cursor only completes one loop

I am at the end of my rope here. This cursor runs fine for one iteration and then stops. It doesn't throw an error, it just completes. There are 3,000 rows in my table, so I don't know why it would do ...
7
votes
2answers
4k views

How to create a checkbox parameter in a ArcGIS custom Python tool?

I am working on creating an ArcGIS tool from a Python script I am writing. I am wondering if it is possible to have a checkbox parameter. Basically what I want to do is have a parameter where the ...
3
votes
1answer
3k views

How to set the Output Extent (Environment Setting)?

I'm a bit confused as I'm trying to figure out how to set my output extent before creating Thiessen Polygons in a loop of ~100 points shapefile. (ArcMAP 10.0 - Python) for i in range(3,51,1): ...
0
votes
1answer
463 views

How to update element text in arcpy.mapping? [closed]

I have a problem updating a map element text (named element1) in a map document using the following code: a1 = '"' + ("element" + str(1)) + '"' for elm in arcpy.mapping.ListLayoutElements(mxd, ...
2
votes
1answer
449 views

Intersection of convex polygons on a spherical surface

There are a number of algorithms available for the intersection of two convex polygons, but I am interested in an algorithm to find the intersection of two convex polygons on the surface of a sphere, ...
1
vote
1answer
732 views

how to install networkx python in QGIS

How to install and how to compile networkx python on QGIS? I always get an error that no module named networkx in the console of QGIS I copied the file networkx in C:\Program Files\Quantum GIS ...
2
votes
1answer
792 views

Help with Python script for exporting mxds into pdfs!

I have written a python script to export my mxd into a pdf (not using data driven pages). I am getting the error that my mxd path is incorrect! I have included my script below. Any help would be ...
2
votes
1answer
954 views

Python - read shapefile .dbf for encoding

I've written a python script that formats a .shp such that its fields structure matches my office's database view in order to ingest the data of said shapefile. This original shapefile was encoded ...
6
votes
1answer
489 views

Perpendicular lines at start and end of a line

I have some lines. I want to draw perpendicular lines at the start and end of the lines, on both sides of the lines. Can somebody help me in Python? Also, what are the variable settings of the ...
3
votes
2answers
169 views

How do I detect solid fill tiles in mapnik?

I'm using mapnik (python api) to render a very simple map where land polygons are black and water is white. There are no other features on the map. I'd like to detect if my tile is completely solid ...
1
vote
2answers
230 views

Batch set value/calculate field inside Cursor

I am matching data using a cursor, where one of the final steps is filling in a new attribute, match, with a value calculated during the cursor. This matching is done to an ID field in the original ...
6
votes
3answers
739 views

Classifying point coordinates to countries or continents?

I have about 50 000 points (latitude and longitude), and I would like to find out in which country each of the points is located. It does not need to be super precise, though. (Or actually I only ...
2
votes
1answer
134 views

Can I choose specific SDE version to create replica geodatabase from?

I'm trying to automate the process of exporting a replica geodatabase using the geoprocessing tools and eventually a Python script. I can't figure out how to create the replica from a specific ...
2
votes
1answer
523 views

Update Layer with python, error attribute renderer

I am attempting to automate symbology using python, and ArcMap 10.0. I am importing this script into a toolbox, which I run from arcmap Currently I am getting two errors: 1) LayerObject: Set ...
6
votes
1answer
2k views

How to transform a selected multipart feature into singlepart features while editing in QGIS?

There are several questions and respective answers for how to make a multipart features Layer into a singlepart features one using QGIS: How to break a single polygon into multiple polys? How to ...
8
votes
2answers
725 views

How to remove spikes in polygons with ArcGIS 10/Python?

In the picture below you can see a polygon layer, representing steep slopes, extracted from a TIN. The polygons have a lot of spikes in them. I would like to remove these spikes while the rest of the ...
1
vote
1answer
178 views

How to use QgsVertexMarker in a python plugin?

I am trying to display a vertex marker for a QGIS python plugin I am writing. I am getting a the following error... 'NameError: global name 'QgsVertexMarker' is not defined' canv = ...
3
votes
2answers
1k views

Automating batch load of multiple GPX files into PostGIS

I've got 50+ GPX files that I would like to "batch load" into a PostGIS database. All of the track_points data would be loaded into a "track_points" table (with typical GPS fields like lat, long, ...
3
votes
1answer
499 views

How Can I Calculate Time from Coordinate?

For my application I am searching for an API or an algorithm for clicking point time and time zone. I dont know how I can do this but after getting time I want to calculate giving coordinate sun ...
30
votes
4answers
4k views

Performance of ArcGISScripting and large spatial data sets

I am currently writing a python script using the arcgisscripting module to process a reasonably large data set (~10,000 records in total) normalised over a small number of tables, 8 in total. The ...
5
votes
2answers
455 views

SelectLayerByLocation not Selecting

I have been trying for some time now to create a script to extract the polygons within an extent, but am unable to get the same result as when I use the user interface manual method. Maybe someone ...
1
vote
1answer
262 views

.Net to Python - ArcGIS Add-in

Background: I have been tasked with porting a 9.3 .NET toolbar to ArcGIS 10 / 10.1. I am a dyed in the wool Python programmer and, while digging through someone else's .Net is interesting, it isn't ...
1
vote
1answer
341 views

Cannot install TimeManager 0.7: no module named six

I was able to extract and copy dateutil to C:\OSGeo4W\apps\qgis\python\dateutil and the error saying that dateutil wasn't found disappeared. But now I am getting the error no module named six. Tried ...
2
votes
2answers
1k views

“The tool not licensed” ERROR on a geoprocessing service on ArcGIS Server 10.1

I have a python script which runs well as geoprocesing tool. When published on ArcGIS Server 10.1 as geoprocessing service, however, it throws the following error: Unable to complete operation. Error ...
2
votes
2answers
247 views

How do I automate performing analysis (intersection) between objects within different feature classes, for a large number of objects?

I have two tables of roads - the same roads, from different sources, and am trying to compare how similar their positions are. I'm wanting to buffer each road in one of the feature classes and ...
0
votes
1answer
674 views

Points in Polygon Count: Error with arcpy.selectLayerByLocation_management

I'm working on generating some multivariate hexbins and am running into a problem with the initial step of counting the number of points (for the first variable) that are within each hex polygon. Here ...
12
votes
4answers
503 views

Mirror of Michigan State University's Python geoprocessing course materials

Been learning geoprocessing with Python using MSU's GEOG 825 ( python geoprocessing ) course. Unfortunately the link is dead now. I know this is a long shot but does anybody have a copy of the ...
5
votes
1answer
2k views

Export each layer in map to a separate image

I have a mxd file with multiple layers I have to export to PNG/JPG. I would like to create a script which turns on layers one at the time before they are exported. So far I have come up with the ...
3
votes
3answers
1k views

How do I apply Dijkstra's algorithm in Python with PostGIS data?

I have currently parsed OSM data, from a PBF file, into a pgRouting database with the use of osm2po, an excellent parsing tool. I don't however want to use the algorithms provided by pgRouting and ...
5
votes
2answers
2k views

Split a shapefile into multiple shapefiles based on a particular Field [duplicate]

I have a shapefile where there are 3 fields OBJECTID, NAME , LOCALITY. I want to create new shapefile that contains the geometry, projection etc. of the parent shapefile and according to the locality; ...
1
vote
2answers
544 views

Python Mapscript 6.0.1 layer.getShape API

I am attempting to follow the mapscript example described here - http://trac.osgeo.org/mapserver/wiki/RasterQuery but ran into some trouble with s = layer.getShape(result.shapeindex, ...
5
votes
2answers
2k views

arcpy.UpdateCursor for multiple fields

I've hit a wall trying to loop through multiple fields with arcpy.UpdateCursor. I have a list of files (2) with multiple fields (10-15'ish) that have its own error check in SQL, and an error value to ...
2
votes
1answer
290 views

Copy two datasets that particpate in the same relationship class

I have an ArcSDE GDB that looks something like this: ++ GDB +++++ Dataset1 ++++++++ FeatureClass1 ++++++++ FeatureClass2 +++++ Dataset2 ++++++++ FeatureClass3 ++++++++ FeatureClass4 +++++ Table +++++ ...
2
votes
1answer
1k views

QGIS Python version

I have brewed python 2.7.3 onto my Mac (Lion), and installed shapely via pip install shapely. The Polygonizer plugin, however, does not find the shapely library. I see when QGIS loads a Python ...
1
vote
2answers
914 views

Can you use arcpy.Copy_management() with in_memory tables?

I have a table in an ArcSDE GDB I'd like to step through using Python. For performance reasons I wanted to load it into memory like so: arcpy.Copy_management('C:/GDB.sde/MyTable', ...
0
votes
1answer
71 views

Error while publishing a mxd as service uing python

I have created an Excel file with Lat/lon values. I added this data tas a layer in the ArcMap. And I "used Display XY data" otion available on right click. I selected the GCS_WCS_1984 co-ordinate ...
1
vote
1answer
126 views

Script to buffer 2 shapefiles within each folder of a root folder

I need some help with ArcGIS python script My folder tree is like this: /Testing location C1 POIS.shp STREETS.shp C2 etc, etc I'm trying to make a script to run from arcgis that would ...