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

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334 views

How to store attributes of a large shapefile in a list?

I am trying to store the attributes of a shapefile into a list. With following code it works for smaller shapes: addA = [] While provider.nextFeature(feat): attrs = feat.attributeMap() for ...
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1answer
597 views

Generate unique ID upon creating a feature?

Looking for a way to generate a unique Global ID within a feature set when a new feature is created. For example, every time a sewer manhole is added, we need to generate a new unique Global ID that ...
2
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1answer
1k views

How to get point x and y geometry from a shapefile?

I have a shapefile of US Cities and I want to get the X and Y coordinate of EACH city in that shapefile. I've tried this: for city in city_cursor: geom = city.Shape point = geom.getPart() ...
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2answers
2k views

How to calculate volume from a raster file?

I have a raster file containing the depth of water. I need to find the volume of water using that raster file. I need to find the area of each cell and multiply with the depth. How can I do it in ...
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2answers
2k views

How to Add Shapefile with Symbology from Layer File to ArcMap MXD using ArcPy/Python?

Say I have a Shapefile: C:\DATA\points.shp A layer file: C:\SYMBOLOGY\symbology.lyr And a map document: C:\MAPS\map.mxd How can I add points.shp to map.mxd with the properties of symbology.lyr ...
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2answers
400 views

How can I set the settings of an Address Locator within a Model or arcpy?

I am creating a model that processes a large road dataset, then creates an address locator from the roads. The Create Address Locator tool does not allow me to set options like Spelling Sensitivity or ...
2
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3answers
642 views

How to test if geometry is inside another?

I need to tell whether geometries from a shapefile are inside other geometries or not. For example, I want to test if there are trees (represented as points in trees.shp) inside the urban areas ...
2
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1answer
900 views

How to “Merge Selected Features” with python?

I have been looking for the answer to this question for some time now, but can't seem to find it! My problem is straight forward: I have one layer It contains lots of features (only polygons), say ...
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2answers
730 views

upload table to ArcGIS Server

We are building a process which will allow users to submit a table of GPS data to update our central repository for all GPS data. Let's say that the target is simply a SQL data table. At first I ...
2
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1answer
763 views

Error 999998 in Arcpy 10.1

I found an RuntimeError: ERROR 999998: Unexpected Error when lunching Arcpy in my ArcGis 10.1 such as this: Runtime error Traceback (most recent call last): File "", line 50, in File ...
2
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1answer
538 views

Compare two Digital Elevation Model (DEM)

I would like to know what's the best method(s) to compare two DEMs without using any GUI soft like QGIS or ArcGIS. I'd like to do it in Python or C++, with GDAL or other similar lib. Does calculating ...
2
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2answers
1k views

get value from attribute table and change symbology with QGIS and Python

I'm newbie developing plugins for QGIS using Python, this is the first one and it is very frustrating hehe. Ok, this is the situation, I have a 1 point layer in QGIS. Its attribute table has 4 fields ...
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2answers
1k views

Where exactly are qgis.gui and qgis.core located?

I'm trying to create a standalone qgis app using pyqgis, i'll be deploying it by copying the install folder of qgis and source folder of my app, and so for the testing purposes i copied qgis install ...
2
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1answer
1k 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 ...
2
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1answer
2k 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 ...
2
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1answer
686 views

How to use ArcPy cursor to define each feature sequentially as current selection of layer?

I want to implement a script that runs through each feature of a feature class, zooms to the extent of the feature, sets the scale to 1:5.000 and adjacent takes a picture of the scene. The steps are ...
2
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1answer
621 views

Setting parameters in Arcmap for dynamic python script

I have a simple python script that works when run from PythonWin, but when I try to make it dynamic to run inside ArcMap I keep receiving: : ERROR 999999: Error executing function. Failed to execute ...
2
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1answer
1k views

Raster operation with grass.mapcalc

I need to iteratively add each raster map of viewshed analysis obtained from a series of single observer locations. For this i used grass.mapcalc with Python (GRASS 7 for Windows). However, my ...
2
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1answer
778 views

Integrated viewshed analysis

I need to do integrated viewshed analysis of a target with several observer locations. I am going to use r.viewshed analysis function in GRASS. With this function, it is possible to perform analysis ...
2
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2answers
2k views

How to incorporate drop-down list within cells of shapefile attribute table using ArcGIS Desktop?

A question has been brought to my attention. When working with a shapefile within either 10 or 10.1. Is it possible to create a python script or some sort of programming language to accomplish this ...
2
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1answer
631 views

arcpy.AddMessage and codepage problems

Some times in my tools I need to output Cyrillic text via arcpy.AddMessage function. Previously in 10.0 it was very easy. I had .py file of the tool saved in UTF8 codepage. This code wrote messages ...
2
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1answer
2k views

rtree python polygon index

Sorry for a very basic questions about rtree. I would like to check whether the point is inside the polygon and the distance (point to the nearest point in polygon) as well. I was thinking about ...
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2answers
2k views

How do you create a button in ArcGIS and have it run code?

I'm brand new to ArcGIS and have only a year or two of programming experience. I know Java and a little C#. I have a Java app that processes geographical data. I need to have a button in ArcMap that, ...
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1answer
991 views

How to change cursor shape in pyQGIS?

I noticed that PyQGis has QgsMapToolPan() and QgsMapToolZoom() functions, and the cursor shape on the canvas will change to a hand (for pan), magnifying-glass(+/-) (for zoomIn / zoomOut). I have a ...
2
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1answer
396 views

Uploading shapefile to GeoServer using cURL and replace file?

In the sequence of this: How to upload a shapefile to geoserver using cURL? which was properly solved, I now need to be able to replace the existing file, cause my process is to be repeated every ...
2
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1answer
1k views

Create new polygon layers from postcodes latitude & longitude

First at all, I want to say that I am geocoding enthusiastic but have no formal background on GIS. I'll do my best to use the right wording and make myself clear what I am striving for. Also the only ...
2
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1answer
469 views

NEAR_3D function without the need for 3D Analyst, Arcpy

I am looking for a python script which would do similar as the ArcGIS 3D Analyst NEAR_3D function. Basically I would like to programatically in python find nearest points of one point feature class ...
2
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1answer
352 views

Index for data driven page created atlas?

We have a parcel atlas created from a data driven page document where each page represents a particular 16 mile square township. I have created my own index of polygons instead of ArcGIS index ...
2
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2answers
168 views

How to use model-builder iterator with a custom bit of arbitrary code?

How do I integrate a in-line variable from modelbuilder into a python script? Specifically, I'm using an iterator, and I'm trying to include the 'name' variable in a python script. I believe the ...
2
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1answer
444 views

Edit Shapefiles Attribute data in GeoServer Programatically

I'm rendering a shapefile using GeoServer and using OpenLayers library to render it in the web browser. Now I have created the option of editing the attribute data in web browser. I want the edited ...
2
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1answer
1k views

How to drop ArcSDE connection using Python scripting?

I want to be able to control connections to ArcSDE via python. Here is my script so far using ESRI's example. import arcpy from arcpy import env env.workspace = r"SDEConnection" fcList = ...
2
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1answer
172 views

Merge section polygons in PLSS

I am trying to merge quarter quarter sections of polygons from PLSS into a quarter section. However, I also want it assigned to correct Township/Range/Section while merging. I know I can hand merge ...
2
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1answer
668 views

Python: Run script when opening an MXD in ArcGIS 10

This post is related to Run a Python Script when opening an MXD? I would like a python script to run every time a .mxd is opened. However, the link above uses VBA to do it, which ESRI suggests ...
2
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1answer
2k views

Outputting results message from spatial statistics tool to text file using Python?

I'm using the following tool in ArcGIS 10 - Calculate Distance Band from Neighbor Count (Spatial Statistics). I'm using a python script to execute this tool several times on different shapefiles: ...
2
votes
2answers
988 views

Having trouble getting specific items from a list. What am I doing wrong?

I am a total beginner when it comes to python. I received some help already getting this code started but I hit a wall. I have a directory with 200 folders, each with a geodatabase, feature dataset, ...
2
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1answer
374 views

Use arcpy.SearchCursor with raster

How can I efficiently subdivide one raster into multiple rasters using the arcpy.SearchCursor? For example if I have a slope and I was to subdivide into 3 rasters: slope1 with values between 0 and ...
2
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2answers
319 views

What are my hosting options for an app that needs tilestashe along side a django app?

I'm building a GIS webapp that uses tilestache to serve MBTiles and a django app to serve geoJson. I'm having trouble understanding exactly what kind of setup I'd need to host this. I'm new to server ...
2
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1answer
671 views

How to switch to a GDB created in the middle of a script

EDIT: Here's my full script and hopefully a better way of explaining what I need done: #Import import arcpy, sys, os # Set environment settings arcpy.env.workspace = sys.argv[1] inFiles = ...
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2answers
1k views

How to set up a plugin repository for QGIS?

I am working with python plugins for QGIS.I developed my plugin and created .zip file including my .ui,.py and resources files.In order to incooperate this plugin into QGIS i created .xml file ...
2
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1answer
255 views

Query for Selecting only Selected Fc's from a GDB

I need to version n number of fc's which start with sde."ENT-QA". I need to select only those feature classes and run versioning for it. Can anyone help me in writing the query for selecting only fc's ...
2
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2answers
655 views

Parameterized insert query to PostGIS fails

I have a PostGIS database table that I need to insert data into. I'm using Python 3 and the pg8000 interface to Postgres. Somehow, parameterized inserts do not work. If I do iq="INSERT INTO ...
2
votes
1answer
645 views

Running C# code from Python tool for ArcMap?

It appears that the only way to copy individual rows of data while preserving GlobalIDs in code is by using C# or VB.NET. I need to run the C# code from the above link within a python tool, and I am ...
2
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2answers
1k views

Automate creating Rectified files from georeferenced images

A python 2.6.5 / ArcGIS 10 solution is preferred. UPDATE: I found a tool to do this "Create Ortho Corrected Raster Dataset" but the python script for it gives errors when I try. import arcpy import ...
2
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3answers
715 views

Definition Query to Python script on Oracle 9i and ArcGIS 9.3.1

SUBTYPECD=1 AND SERIESNAME NOT LIKE '%-%' AND OPERATIONALSTATUS IS NULL OR SUBTYPECD=1 AND SERIESNAME NOT LIKE '%-%' AND OPERATIONALSTATUS = 976 The above is my def query in ArcMap against ArcSDE ...
2
votes
1answer
1k views

Area units for GEOS area property?

I'm working with GeoDjango and have a polygon in the WGS84 projection. I need to find its area in square meters. When I call polygon.area, I get some float out and I have no idea what the units of ...
2
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2answers
2k views

Recoding values based on contents using ArcGIS Field Calculator or Python?

Is there a convenient (or even effective) method for recoding field values using the field calculator or standalone python script? In this case, I am given several unique strings to identify a type ...
2
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2answers
884 views

Any python script to convert a geoPDF to a KML embedded with a jpg link?

I have many geoPDFs. I want to turn them into KMZ or KML+JPEG using a python script. Any suggestions? SEE CODE BELOW
2
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2answers
570 views

ArcObjects table views or SQLite3 in Python?

Given a larger csv (1000+ points) with attributes, I need to do both attribute and spatial queries on the data. Would it be faster to read the points into an xy feature class, and do the spatial and ...
2
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1answer
58 views

“unexpected indent” in the script

I'm using a QGIS 2.8 in windows 10. I have 2 scripts that are working separately but when I write both in just one script, it doesn't work. The 1st script is to load one raster to QGIs with a defined ...
2
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1answer
31 views

Change which default python install runs .py scripts a the command prompt

I have 3 installations of python on my machine currently, the ArcGIS install, the QGIS install, and an Anaconda install. The Anaconda is the on that I use predominantly. If I run a .py script ...