A site-package created by Esri to expose ArcObjects to Python.

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48
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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 ...
48
votes
6answers
4k views

When to use ModelBuilder over Python scripting and vice versa?

I am new to Python scripting in ArcGIS but not new to ModelBuilder. I would like to know the benefits of Python vs ModelBuilder. When should we write Python script for GIS automation rather than ...
35
votes
7answers
6k views

How can I effectively debug arcpy Python scripts?

I have written many Python scripts using arcpy in ArcGIS 10, and so far my only means of debugging is restricted to printing messages to the geoprocessing results window using arcpy.AddMessage(). Are ...
29
votes
3answers
1k views

How to Share Open Source Python Code for ArcGIS?

My company just purchased ArcGIS software. I'll be writing scripts for ArcGIS in Python. Is there a community or open source project where this code can be shared?
29
votes
2answers
2k views

Streamlining Python Code for Big Data

I have Python code which is designed to take point shapefiles through the following workflow: Merge points Integrate points, such that any points within 1 m of each other become one point Create ...
28
votes
10answers
7k views

What are some resources for learning ArcPy?

I would like to learn ArcPy, but I do not know quite where to begin. Does anyone have any good advice on where I should start to learn ArcPy?
28
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 ...
21
votes
6answers
8k views

Ways to Speed Up Python Scripts Running As ArcGIS Tools

This is a pretty general question. I just wondering what tips and tricks GIS programmers have used to speed up arcpy scripts that you import into the toolbox and run. I work most everyday writing ...
20
votes
4answers
2k views

Run a Python Script when opening an MXD?

Can anyone tell me how to accomplish this? I want a Python script to run on opening the MXD which would pull an excel worksheet into a GDB and refresh the map. I only want this to happen in this ...
19
votes
1answer
1k views

How to Split a Concave Polygon Into Convex Polygons in Arcpy?

I'm looking for a tool or algorithm to detect concave polygons and split them into convex polygons. Like explained in the picture, the blue polygon is split into A and B polygons I'm using Arcpy ...
18
votes
7answers
3k views

Is there a way to code-complete arcpy scripts using an external editor?

I have been scripting in Python for ArcGIS 10, and so far I have just been using Notepad++. I like how the Python command line interface code-completes arcpy functionality for you, showing you your ...
18
votes
3answers
12k views

ArcPy and running Python scripts (with parameters) within another Python script

A common coding pattern used in AML was to run an AML (with parameters) inside another AML. An application that I'm currently developing would benefit from being able to run a Python script (with ...
18
votes
1answer
1k views

ArcGIS 10.1 Python AddIn Using Multiprocessing crashes ArcMap?

I would like to run a multiprocessing task from a python add-in tool. My issue is that the process keeps failing. Basically crashes ArcMap. Here is my basic code: def function(startOID, endOID, ...
16
votes
6answers
4k views

Documentation for Esri's ArcPy Python site-package?

Has anyone found any informative documentation about Esri's ArcPy Python module?
16
votes
5answers
1k views

How are people using Python data structures and classes in ArcPy?

This question may expose my ignorance on programming but I'm curious about how people are using different python data structures within ArcPy. This page lists the data structures in Python. I ...
16
votes
5answers
748 views

How to buffer raster pixels by their values?

The pixels to the left represent tree locations and their associated crown radii (i.e. pixel values ranging from 2 - 5). I would like to buffer these raster pixels by their crown radius value. The ...
16
votes
2answers
3k views

Adding new group layer with ArcPy?

Does anyone now how to add a group layer with Python in ArcGIS Desktop 10? I can use arcpy.mapping.AddLayer but surely this is only for an actual layer as opposed to a group layer. so far I have ...
15
votes
3answers
10k views

Listing all feature classes in File Geodatabase, including within feature datasets?

From python how can I build a list of all feature classes in a file geodatabase (*.gdb), including inside feature datasets? The standard example only lists feature classes at the top level of the ...
15
votes
5answers
2k views

How to make a GIS inventory?

My office will be seeing a big change in its GIS section. This section has been operational since the 1980's and has a huge collection of GIS data (i.e., shapefiles, raster files, data, etc) but never ...
15
votes
2answers
2k views

Exporting table to XYZ ASCII file via ArcPy?

I'm looking for a way to export an ArcGIS table (created with the Sample tool) to a text file via ArcPy. I can do this in ArcGIS via the context menu by right-clicking the table, but have not found ...
14
votes
3answers
2k views

Porting Avenue code for Producing Building Shadows to ArcPy/Python for ArcGIS Desktop?

Whuber provided an answer at Producing building shadows? which required using Avenue code. Any idea how to make it work in ArcGIS Desktop 10?
14
votes
3answers
2k views

Do ArcGIS SpatialReference object factory codes correspond with EPSG numbers?

I've got a project where I'm reading in geometry objects from text files to put them in ArcSDE. These geometry objects have an associated EPSG code, and I'm looking for a way to ensure they're in the ...
14
votes
4answers
9k views

Is it possible to use Arcpy in ArcGIS 10 to zoom to a selected feature?

The answer to this may be a simple yes or no, but I'm hoping that someone is aware of a way to zoom to the extent of a selected feature using the ArcPy modules in ArcGIS 10.
14
votes
1answer
4k views

Fastest way to count the number of features in a feature class?

With the introduction of the Data Access module in arcpy (30x faster search cursors), I want to know if counting features matching sql criteria is faster than the traditional MakeTableView + GetCount ...
14
votes
2answers
1k views

Calling arcpy/python from .NET?

Are there any available examples that show how python can be integrated into a .NET ArcGIS Addin or Extension? I have a series of python scripts that I would like to call from form events (e.g. button ...
14
votes
3answers
3k views

Can i use ArcPy to get layer symbology?

Hello all Since ArcGIS 10 comes with ArcPy package, i'm wondering it is possible to use ArcPy functions to get Symbology (i.e color, width...) of a layer? Thanks in advance
13
votes
5answers
2k views

How can one compare two geometries in arcpy successfully?

I am trying to compare two separate feature classes to identify differences between them (sort of a diff function). My basic workflow: I extract the geometries using a SearchCursor Save the ...
13
votes
2answers
2k views

How to smooth/interpolate a raster in python using GDAL?

This is my first post so please feel free to critique where necessary. Background: I am developing in Python and using GDAL from OSGEO to manipulate and interact with rasters and shapefiles. ...
13
votes
2answers
310 views

File organization for sharing ArcGIS python code

What is the best organizational structure for sharing ArcGIS python code and geoprocessing tools? Or even, are sharing code and sharing tools separate questions? Esri has a Methods for distributing ...
13
votes
1answer
354 views

Watermarking photos using their geotag and create a shapefile

I have geotagged photographs and I would like to place a watermark of the photos location on the front for easy reference as well as creating a shapefile from the coordinates. Does anyone know of any ...
13
votes
3answers
3k views

How do I use sys.exit(0) in an arcpy script to exit early without having an error message show up?

I have an arcpy tool script for ArcGIS 10.0 that has two major functional sections. The user can choose whether or not to run the second section. If the user chooses NOT to run the second section, I ...
13
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 ...
13
votes
1answer
875 views

How can I utilize NumPy arrays to optimize big data geoprocessing?

I'm interested in learning how to utilize NumPy arrays to optimize geoprocessing. Much of my work involves "big data", where geoprocessing often takes days to accomplish certain tasks. Needless to ...
12
votes
3answers
6k views

What is the proper syntax and usage for ArcGIS “in_memory” workspace?

I am unclear how best to use the in_memory workspace in ArcGIS. The best resource I have found on the subject is from ESRI on Using in-memory workspace. Unfortunately, the help section is not very ...
12
votes
2answers
11k views

Adding shapefile as layer in ArcGIS Desktop using Python/ArcPy?

I am trying to automate various tasks in ArcGIS Desktop (using ArcMap generally) with Python, and I keep needing a way to add a shape file to the current map. (And then do stuff to it, but that's ...
12
votes
3answers
9k views

Will ArcGIS 10 support Python 2.7 or Python 3.1?

I'm curious to know whether ArcGIS 10 will support newer versions of Python than 2.6. And for that matter newer versions of NumPy (ie, 1.4, 1.5 etc). I'm sure that this documentation is on the ESRI ...
7
votes
3answers
1k views

python script error- with GetParameterAsText

I have a seemingly simple code which iterates through a list of feature classes and calculates an ID field in the attribute table that is equal to the first 5 characters of feature class name. The ...
5
votes
2answers
296 views

Split one field into 3 fields?

I need to split the values in a field according to what they represent to be able to do a join on the data. As seen above I have a ID field that needs to be split into the following: The ID consist ...
5
votes
2answers
80 views
+50

ArcPad Checkout from python command line

I have been developing a script to automate my ArcPad checkin/checkout processes. My problem is that I am having trouble getting arcpy to recognize the ArcPad tools from the command line. From the ...
4
votes
2answers
82 views
+50

Issues Adding MapServerCache Raster Layers to Mxd

I have created a data consolidation tool. It consolidates a users mxd's vector and raster data into a project structure. It also allows the user to optionally cache our companies ArcGIS Server Web ...
3
votes
0answers
302 views

Using arcpy.da.editor on a transactional version raising errors

I've run up against a wall trying to get an edit session to work on a version. These are the scenarios Ive gone through in the code and their error mesages: Setting up an edit session not as a ...
2
votes
2answers
630 views

Python scripting for ArcPad Checkin

I can use ArcGIS Desktop model builder to leverage the ArcPad Check In Tool. When I run the model it executes successfully. When I export the model as python I get this code: import arcpy # Local ...
2
votes
1answer
11 views

Is it possible to set data source of ArcMap MXD via replica MXD on remote server?

I have two ArcGIS Server instances, one is development and the other is production. I've copied the MXDs and .msds from my arcgisserver folder on server one to server two for back up. Instead of ...
2
votes
1answer
162 views

Optimizing arcpy script to batch generate OD cost matrix in road networks

Following the question I asked in this thread, I wrote a python script designed to compute an OD cost matrix given a road network and origins/destinations locations. I am completely new to python, so ...
1
vote
1answer
32 views

ArcGIS geometry update from table XY

I am trying to update the geometry of a point FC stored in a FileGeodatabase using ArcPy. I got this Python script to compare the values of the SHAPE@X and SHAPE@Y and change the Geometry if not ...
1
vote
1answer
23 views

How do I insert a date string into the database as a date?

I'm using an InsertCursor to insert rows into a feature class. One of the fields in the source data may contain a NULL data value. The destination feature class requires a date - it is not nullable. ...
1
vote
2answers
32 views

How to get cell value along Flow Direction

I have: a flow direction raster where I took off (assigned NoData value) the cells that overlayed the river network (from flow accumulation). a perfectly overlapping raster where I asigned a ...
1
vote
0answers
32 views

Arcpy.Exists Fails On Existing Layers

I am running into an issue where the arcpy.Exists() function returns a false for a known good layer in the python interactive window. We are using a map document template for the layers set up in the ...
0
votes
1answer
23 views

Pythonic way to recalculate feature extent in ArcGIS 10.2

I am creating a tool that will automate a tedious process of data standardization. One of the steps is to recalculate the feature extent of a SDE file. Surprisingly I cannot find anything useful in ...
0
votes
1answer
15 views

Inline variable substitution in Model Builder using python code

I have an inline variable substiution which I would like to import into my Python script. Is that possible? I am trying to make a parameter within my path. My path currently is ...