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

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Get a point on a polyline from end points given distance along poly line

I have start point and end point of a polyline. How can I get a point on that polyline from end points specified by the given distance. How can I get this by using arcpy provided that this script ...
8
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3answers
591 views

Is there a way to tell the geodatabase version using Python?

I want to find out if either a file or personal geodatabase is 9.3, 10.0, 10.1, etc Is there a way to do this using Python?
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2answers
946 views

ArcMap running scripts slower if you import Arcpy

I am finding ArcMap runs slower, if you have written a script, which imports arcpy. You may wish to write a script that can be operated in ArcMap, through the python window, or as a standalone ...
8
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1answer
723 views

Fastest methods for modifying attribute tables with Python?

A while ago, I wrote a quick Python function for converting an attribute table to a python dictionary, where the key is taken from a user-specified unique ID field (typically the OID field). ...
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4answers
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How to split single address field into 4 fields (House No., Direction, Name, Suffix)

I have to do some massaging of our parcel data to make it usable by a program in sheriff helicopters. The program requires one of the following address formats within the fields: Our addresses are ...
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5answers
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How to split points by polygon using ArcGIS Desktop?

I am looking for a way to split points by a county polygon feature class. The attached image shows two feature classes: one composed of points and the other a county polygon feature class. The split ...
8
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2answers
614 views

How to create a solar intensity map for a garden plot?

I'm interested in creating a raster surface that depicts the average solar intensity per unit area for a small garden plot. I imagine the inputs into the model would be the following: Plot ...
8
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3answers
260 views

How to perform a “mostly within” selection?

I'm looking for a way to determine if a polyline is "mostly within" a polygon. Since mostly within is arbitrary, I would need be able to enter a percentage at its execution. I thought there might ...
8
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1answer
2k views

Guidelines for organizing Python Toolboxes (.pyt) in ArcGIS

For one of my tasks I need to create a Toolbox with three tools (python scripts). Instead of ordinary tbx I've decided to write it as Python Toolbox (pyt). Everything is clear except the "good" way ...
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2answers
1k views

How to keep spatial reference using arcpy.RasterToNumPyArray?

I am using ArcGIS 10.1, and want to create a new raster based on two preexisting rasters. The RasterToNumPyArray has a good example which I want to adapt. import arcpy import numpy myArray = ...
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1answer
529 views

Reduce extent of raster processing in ArcPy or ArcGIS Desktop?

I need to reduce the processing extent of my raster by some sort of automatic procedure in python. Currently the borders of the dataset I've been using has anomalies (due to the classification of the ...
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2answers
289 views

Unusual results for geoprocessing speed tests

I have been observing unusual performance with a Python geoprocessing script. The (attached) script performs the following actions: Use a search cursor to look up UTM zone corresponding to polygon ...
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1answer
1k views

concurrent use of in_memory workspace in arcpy

i am using a python script that's eliminating small polygons from a feature class. this script creates temporary feature classes with fixed (hardcoded) names in the "in_memory" workspace. example: ...
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3answers
2k views

How to get full path of layer selected in drop-down box for ArcGIS Python tool

I have a Python script-based tool in ArcGIS. One of the parameters for the tool is an input raster file, which I've set (using the properties of the tool within the toolbox) to be a Raster Layer. This ...
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2answers
3k views

How to Rotate Features in ArcGIS for Desktop using ArcPy?

I have a series of polygons that I want to rotate. Each polygon has a rotate angle and an anchor point (xy coordinate) stored as field values. As it happens, all anchor points are on a vertex of ...
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3answers
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python script error- with GetParameterAsText [duplicate]

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 ...
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2answers
356 views

ArcGIS 10: Create an event linear layer from a point layer based on directionality

I have a point layer that reflects the speed limits and a line layer of the roads. The location of the speed sign indicates in which direction the speed limit applies. How can I make linear event ...
8
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1answer
5k views

Use python to add layers to TOC

I've been battling with adding layers to the TOC for some time now. I have managed to single layers added but need to loop through a folder and add all layers. Shapefiles I cannot get to add at all. ...
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2answers
967 views

With arcpy, how do I detect relationship classes in a file GDB (or can't I)?

I would like to be able to detect relationship classes in a file GDB. Because users of my script might have only an ArcView level license, they would not be able to manipulate the schema of a feature ...
8
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6answers
680 views

Divide polygons into *n* number of groups of equal counts with ArcGIS 10.2

One of my tasks for work is to divide parcels into groups. These groups will be used by agents to talk to property owners. The goal is to make the agent's job easy by grouping parcels that are near ...
8
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1answer
248 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 ...
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2answers
673 views

Creating summary table of symbology of all datasets in multiple MXDs?

This is related to the following Retain ESRI symbology in Mapinfo TAB . As an initial step (in arcpy) I want to access the symbology of all the datasets and create a document which has the details of ...
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2answers
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Using arcpy.SetParameter() with Python Script Tool published as Geoprocessing Service?

I have a script that needs to be published to ArcGIS Server as a geoprocessing service. This script computes a set of records in table form. I need to set an output parameter so that it returns the ...
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2answers
775 views

How to write scripts that can call on both Arcpy and PyQGIS?

I have spent quite a bit of time looking for a clear answer this topic and have still been unable to really accomplish my goal of accessing PyQGIS in a stand alone script. Parts of answers have been ...
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4answers
315 views

How to determine if point is surrounded using raster processing?

I am attempting to improve a currently extremely cumbersome vector/python process for a natural hazard model. At the moment we have a lengthy script which generates distance/bearing lines from a given ...
8
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1answer
258 views

Difference between python window and toolbox

Are there differences in performance or other potentially critical area between running a python script in the python window versus running it from the toolbox in ArcGIS 10.0? I am asking in cases ...
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1answer
716 views

Handle annotation layers with arcpy

I want to access annotation layers using arcpy (the purpose is to verify few text strings in text annotations). By annotation I mean draw tool annotations, not dynamic labels. These annotation layers ...
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2answers
831 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 ...
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0answers
378 views

Two machines running the same arcpy based software - only one is leaking memory [closed]

Ok, so I'm running a rather large Python application based on arcpy on two separate machines - one of them is leaking memory and one is not. Both are running the same operation in the software. The ...
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4answers
4k views

How to convert geometry to WKT using ArcPy?

I would like to be able to convert a single feature (or potentially many features) in an ArcGIS layer into Well Known Text (WKT) format during a geoprocessing operation using Python and ArcPy (no ...
7
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3answers
5k views

How to delete feature class features faster (ArcPy)

I have written this script that recurses through all feature classes in a given set of feature datasets and deletes all their features. It appears to do the job but it runs pretty slowly. Is there ...
7
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3answers
7k views

Python - formatting path strings and checking if a path exists

I would like to use the following code to determine if a path exists. The path I would like to check is being passed to my code via parameter on a ArcMap 10.0 tool dialog box. The parameters data ...
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5answers
804 views

python.multiprocessing and “FATAL ERROR (INFADI) MISSING DIRECTORY”

While trying to do multiprocessing with arcpy, I am occasionally running into this error: FATAL ERROR (INFADI) MISSING DIRECTORY I have no clue what is triggering this error, and it crashes the ...
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1answer
4k views

Converting ArcGIS date value to string reading in mm/dd/yyyy format using ArcPy?

I am writing an arcpy tool script in ArcGIS 10.0. In a fGDB feature class, I have a Date type field. I gather that the values in the Date field are stored as long integer dates, but they display in ...
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3answers
3k views

Clipping raster by multiple datasets or polygons?

I would like to clip a DEM using a grid of polygons. It's probably easier to use multiple polygons in one shape file, but I haven't managed this so I'm trying to use a for loop so I can loop through ...
7
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4answers
3k views

Exploding overlapping to new non-overlapping polygons?

Given multiple polygons that overlap in multiple ways, I would like to export from these features all polygons that don't overlap with others, iteratively. The product would be a number of features ...
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3answers
3k views

Does ArcPy have a spatial search function for geometry?

My problem: Using ArcPy I want to loop over buffers and select geometry_features inside each buffer and do something (update) only the objects found within that specific buffer. The code below ...
7
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3answers
561 views

can arcpy detect whether it's running in Desktop or Server?

I'm developing some code that I want to run both as an ArcGIS Server web service and as a standalone script. I want to be able to modify the execution slightly depending on whether it's running as an ...
7
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1answer
1k views

Meaning of exclamation mark in Python parser of ArcGIS Field Calculator?

In the following line, I don't understand what those exclamation marks mean? And why put everything in quotation? I don't understand the purpose of the variable expression, please explain to me as I'm ...
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2answers
261 views

Finding specific pixel values ​​in ArcGIS using Python

I have a raster file containing some integer values. I need to find all pixels whose values are not defined in list like this one: l = [1,2,4,8,16,32,64,128]. Is there any easy way to solve that ...
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2answers
3k views

Getting XY map coordinates on mouse clicks as input variables into a python script

This is my first time coding in python, so bear with me. I wrote a script to calculate an analytical solution to find the orientation of a plane based on three points. I'm using ArcGIS 10.1. # Input ...
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1answer
2k views

How to perform a table look-up using Python in ArcGIS 10.0?

Using ArcGIS 10.1 the arcpy module has a TableToNumPyArray command, which converts a table into an array. Unfortunately I don't have access to 10.1 on my work PC. Is there a workaround which will ...
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2answers
6k views

How to clip a vector feature to the extent of an existing raster dataset using arcpy

I have a clipped raster dataset with polylines (from the contour tool) overlayed (see attached). I am trying to clip the polylines to the extent of the raster dataset, which seems simple enough, but ...
7
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2answers
874 views

Process a raster with multiple geoprocessing tools in arcgis 10 using python - flow between processes

I'm writing a short python script that includes processing rasters with different geoprocessing tools in ArcGis 10, for example, the three processes below, is this best way to use multiple tools ...
7
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3answers
3k views

Writing world file when exporting TIFF using ArcPy Mapping?

According to documentation, the options are: Syntax ExportToTIFF (map_document, out_tiff, {data_frame}, {df_export_width}, {df_export_height}, {resolution}, {world_file}, {color_mode}, ...
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2answers
754 views

How to specify unit of measurement when accessing Geometry() object's 'length' attribute?

Using the CalculateField_management tool, one can specify the unit of measurement when calculating shape length: #Calculate polyline lengths in miles polylines = "C:\sampleShape.shp" ...
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2answers
2k views

Getting unique value of second field using arcpy.da.SearchCursor?

I have a feature class and using arcpy.da.SearchCursor I'm getting unique values of a field (e.g. Name). How can I use this method to get the associated row value of a different field (diff field = ...
7
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1answer
4k views

using arcpy outside arcmap

There may be something I'm missing, but is it possible to use the arcpy module outside arcmap? My situation is that we have one license on a computer which is shared over a network. I need to do ...
7
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2answers
3k views

Modify raster layer display and symbology properties programmatically with arcpy or ArcObjects

I have over 1500 NITF files that I need to be able to modify the layer display and symbology of programmatically from within ArcMap. I need to set the properties outlined in red below: I've looked ...
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3answers
3k views

How to create a circle in arcpy

Suppose I have a dataset where each record has an x,y and r (the centroid and radius of a circle). How can I create a polygon feature class containing parametric circles? Sorry to those who have a ...