The act of setting up computing instructions, usually stored in a file and interpreted at run time.

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6
votes
2answers
691 views

Cannot run standalone QGIS script

I've been trying, along with this post, to run a script in OSGeo4w Shell, outside of QGIS. But I get the following error: ImportError: No module named qgis.core I have also read the following ...
6
votes
1answer
5k views

How to write standalone Python scripts using QGIS?

I've been learning how to use the Python Console in QGIS using references from qgisworkshop.org. I'm familiar with writing standalone scripts in ArcGIS and want to learn how to do the same with QGIS. ...
3
votes
5answers
7k views

Renaming field using ArcPy?

What I need to do: rename a field name of a table/feature class copy all values to the new field So far I have done following code as @artwork21 suggests: import sys import traceback import arcpy ...
12
votes
5answers
8k views

Obtaining extent of each polygon in shapefile?

In arcgis 10 and python I want to get the extent (xmax, ymax, xmin, ymin) info of each of the polygons in a shape file. I can get the extent of the whole shape file using ...
52
votes
10answers
4k views

Alternatives to using Arcpy

I seem to use ESRI's Arcpy site package for virtually all of my python geoprocessing. To ESRI's credit, these are an incredible suite of tools that can help accomplish a great deal. However, I would ...
8
votes
5answers
8k views

Remove feature layer using ArcPy script?

I have an ArcPy based script where I'm trying to intersect two layers where one layer must have its centroid in the other layer. Since I need to know that one layer (feature_layer below) includes ...
3
votes
1answer
665 views

Calculating mean upslope aspect from each cell in DEM using Python?

I am trying to write a python script to calculate the mean aspect upslope from each cell in a DEM. I have the general workflow down, but my final output is restricted to angles between 0 and 90 ...
14
votes
1answer
2k views

How do you write a Python script for repairing data sources in ArcGIS 10

So, I have about 50 mxd's with all broken layers that I have been going through and manually resetting. The data was moved from another computer and the folder structure was changed so it isn't just ...
12
votes
2answers
7k views

How to export only certain columns to a CSV file in ArcGIS?

I've written a python script using arcpy which outputs a polygon feature class into a File Geodatabase. I have added a function to export the attributes to a separate CSV file. I am using the code ...
14
votes
7answers
6k views

Bulk field rename in file geodatabase

I have a file geodatabase with several hundred feature classes in it. Some feature classes have a field that got named incorrectly, and it got named "SCHEMA_FEATURECLASS_ENTITY" instead of just ...
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 ...
9
votes
2answers
3k views

Python scripts that run inside ArcMap vs ones that run outside?

I'm just starting to get into Python scripting for work.. I'm currently creating a script to automate a process. Basically, it asks the user the client name, gets a projection if available, creates ...
6
votes
2answers
3k views

How to use QGIS Zonal Stats Plugin from Python Console?

I am using the Zonal Stats plugin in QGIS to extract raster statistics from overlaying polygons (I have shapefiles of species distribution and I want to extract environmental data from within each ...
4
votes
1answer
237 views

Can multiprocessing with arcpy be run in a script tool?

I have been tinkering around with the multiprocessing module to resolve some processing of data in ArcMap 10.3. I have created a script which works fine if I run it in IDLE. I see all my cores max ...
3
votes
1answer
120 views

Getting random values from geometryType() in a standalone PyQGIS script

I am asking this question based on the result I received from this earlier post. The following script only works if I set geometryType() == 3 as that is what is being printed out in the Python console ...
3
votes
0answers
141 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 ...
3
votes
1answer
587 views

How to run OSgo4W shell script on Windows?

I have a lot of DEMs that I want to use to create hillshades, slopes and color relief from and would like to automate the processes using a shell script within OSgeo4W shell. Here is the code I used ...
2
votes
1answer
435 views

How can I dynamically trim the informational border off of FAA sectional raster charts?

I'm trying to write a script that can automatically use GDAL to crop the informational border from the FAA's published sectional charts (GeoTIFF) found here: I know that I can use gdal_translate ...
3
votes
3answers
244 views

ArcGIS NEAR returns -1

We are running an ArcGIS 10.0 geoprocessing script written in Python that (as part of many steps above & below) runs the NEAR command. Both the input and output datasets (shapefiles & ...
3
votes
1answer
517 views

How to get the Flow or directional raster map using GRASS?

Aside from using r.fill.dir in GRASS, is this the script to produce the Flow or directional raster map? Is this the output for the script ...
2
votes
1answer
956 views

Importing QGIS core into Python on OSX

I am interested in learning how to write standalone scripts using QGIS. An answer to my previous question directed me to the PyGIS CookBook which has the following instructions for importing the ...
13
votes
1answer
3k views

How to have a python script self terminate in ArcMap10?

I have tried sys.exit, but it doesn't seem to work in ArcMap. Anyone know how to do it?
8
votes
1answer
242 views

Where to find and share Python geoprocessing scripts? [duplicate]

Where are folks storing and sharing their Python geoprocessing scripts? For example, I know that GitHub has some shared scripts. ESRI is phasing-out ArcScripts, which is still really handy, and ...
7
votes
1answer
581 views

How to simulate moving vehicles?

I have a point layer (stored in SQL Server 2008) that is being served up by a map service in ArcGIS Server 10.1. I am consuming this service in a web client. Lets say the points are boats out at ...
4
votes
3answers
3k views

Batch shapefile merge, with adding and calculating field

I have over 60 shapefiles, all in their own folders. I'm looking to add a field titled "Name" and then populate it with the name of the shapefile. I want to be able to do this so that I can then ...
8
votes
7answers
804 views

Are there any “highly customizable” GIS platforms?

I'm new to this site which I find useful and refreshing until now. And to my question ( WARNING: it's a bit long, so you can skip right to the question two paragraphs down). I was educated in GIS ...
5
votes
2answers
720 views

Monthly Average Solar Maps (R.Sun) in Grass

I'm trying to create monthly average maps as described in R.Sun in Grass. I have my DSM. In reading the page on OSGEO it mentions that it is possible without showing how. Ideas? I assume I will need ...
7
votes
2answers
4k views

How to calculate XY coordinates in Decimal Degrees from projected dataset in model or script?

Is it possible to calculate points XY coordinates in Decimal Degrees in model or script when a feature class is in projected coordinate system? It's easy when a FC is in geographic coordinate system: ...
6
votes
3answers
2k views

How to send someone a file of a custom python script with all parameters for the popup interface already defined?

I have a python script in ArcGIS 10 that when clicked, has a popup for a user to choose parameters. I would like to send this file to someone else. While I could send them the python code and have ...
6
votes
1answer
1k views

ArcGIS median value from a layer

I've been hunting around ArcGIS 9.3 and having no success at finding a tool/function that can give me the median (not the mean/avg) tabular value of a spatial database. For example, if I have a data ...
4
votes
1answer
2k views

Python syntax error from raster calculator in ArcGIS ModelBuilder?

I am experiencing a problem with the raster calculator in the ModelBuilder under ArcMap 10. I need to combine two layers: a drainage map (issued from a series of previous operations on a DEM) and ...
4
votes
6answers
2k views

script for automated line drawing procedure for set of start and end points

A colleague conducted a field survey and recorded the start and end points of the transects with a GPS. These points have been imported to ArcMap 9.3 as 2 point layers. Both layers have a "transect ...
3
votes
1answer
352 views

Getting Script Error has occurred in script on this page when running polygon to raster conversion?

i keep getting the script error problem every time i try using polygon to raster tool in ArcGIS 10.1. Please help me how I can solve this? screenshot embedded
3
votes
2answers
283 views

ArcGIS Calling Wrong fme.exe When Python Script Converted To An ArcGIS Script Tool

I'm using this this bit of code to execute a FME Workbench file through a Python script ... import os os.system("fme.exe P:\\Mapping\\Scripts\\FME\\Easements_ROW_Extract_From_CAD.fmw") However, ...
2
votes
1answer
110 views

forLoop & joinField & different names

I have a folder with an output (shapefiles) from an iteration. On this output, I want to perform a join between two attributetables. So far so good. Here comes the tricky part. There are different ...
2
votes
3answers
5k views

Python script: Access data from databases [closed]

I need to access data that is inside an oracle database using a python script. Its a Unix server running oracle 10g. I dont have much access to the database server. It works fine on model builder ...
1
vote
3answers
755 views

Automating capture of Extent from multiple mxds with multiple dataframes

I want to create a single shape file from multiple mxd's that have multiple frame sets with different extents in them. I have found/started a script to do this (attached) but can't figure out how to ...
6
votes
1answer
1k views

Setting units in python using ArcGIS 10

I want to calculate the area of each polygon in a shapefile. How do I control what the units of measurement are? def getArea(shapefile): """Print area of polygons""" Rows = ...
5
votes
2answers
426 views

How to identify polygon/point shapefiles in python?

I have a script which performs various functions on shapefiles, most of which are polygon-based. However, some shapefiles are point-based and I have to specify where these files are by editing the ...
5
votes
2answers
656 views

ArcGIS Conflation Tool Recommendation or Custom Script for Comparing Points

Can anyone recommend conflation tools for ArcGIS Desktop (10 or 10.1, paid or free) or a scripting outline / procedure (or just a script) to have a technician efficiently process the following rules? ...
5
votes
3answers
249 views

Methods for lat/lon quality control?

I have a database with fields including latitude, longitude, city, state, and country. When mapped, it is clear that a number of the sites are in the wrong location - most commonly because of a sign ...
5
votes
2answers
3k views

How to install add-ons in GRASS?

How do I install the r.inund.fluv script in GRASS? https://svn.osgeo.org/grass/grass-addons/grass6/raster/r.inund.fluv/
4
votes
2answers
1k views

What causes ModelBuilder error occurred in script on this page MdDlgContent.htm?

I've been creating a model in Arc 10.0 for a few days now without problems. Then I added the Calculate Field Tool. I selected Make Variable --> From Parameter --> Expression. When I check off "Model ...
4
votes
5answers
1k 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 ...
4
votes
5answers
625 views

Can a new point automatically be populated with data from the containing polygon

I need some help to create a script. Imagine that I'm using 3 shapes: 1 point and 2 polygons. When I create a new point I want it to assume some attributes of the polygons in which that point is ...
3
votes
1answer
120 views

Alternative to an arcpy script for points to lines to polygons?

I'm relatively new to arcpy and python, so I feel like I could be missing something obvious in regards to tool options for what I'm trying to achieve. I have a script that creates triangular ...
3
votes
0answers
146 views

How to stop a PyQGIS script that has an infinite loop, using the keyboard?

So i wrote a script that does what i want over and over again using a "while True:" in a certain time interval (every 5 seconds using time.sleep(5)). So far so good BUT when i want to stop it i just ...
3
votes
3answers
794 views

How to merge a large amount of polygon-features in a script?

We have a very large shapefile with over 30000 features and want to merge it with a script on a server. Currently we try it with QGIS, but the processing takes way too much time. Is there a way to do ...
3
votes
1answer
529 views

Python conditional on current and previous row

I need to calculate a new field with a python conditional where some values only occur if a sequence in a separate attribute field (X) occurs. For instance my data set looks like this. Y is the ...
3
votes
2answers
273 views

Finding script location… dynamically

Should be a simple question... but those can be the hardest. I have created a script that uses ESRI's arcpy site package and it functions properly in a stand-alone environment. I am now trying to ...