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

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What's the centerline of a peninsula?

Given a peninsula stretching north south and the two coast lines connecting in the south, I want to find out which is the place, or rather line, which is furthest away from both coastlines on the ...
5
votes
1answer
1k views

How to update shapefile data source in multiple dataframes and mxds using lyr.replaceDataSource and Python dictionary?

After reorganizing the file structure for some of our GIS base data files I need a script to update the data sources for ~ 100 shapefiles in about 50 mxd files. Some of the mxds have multiple data ...
5
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2answers
932 views

How to improve Python script processing speed (performance)?

I've been working on a script which essentially reads in a large amount of point and polygon data and generates frequency values for a featureclass of 2.5 acre hexes covering California. I have found ...
5
votes
1answer
2k views

Exporting map to jpg (multiple times with python)?

I set symbology and exported each raster in my mxd (one by one) to jpg file. My script is ok and it works (it is shown at the bottom). The question is: how can I customly set my legend? Now I have ...
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3answers
1k views

How to repair paths of an unmanaged raster catalog in file GDB?

I'm using ArcGIS 9.3.1 and I have an unmanaged file geodatabase with raster catalogs in it. Tiles are loaded inside the catalog and each tile has a "Full Path" property which is environment specific. ...
5
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1answer
598 views

Is there a way to get layers from a .msd using arcpy?

I need the name of each layer in an .msd, but I could not find support using arcpy (ArcGIS 10.0). Is there a method I missed? In the current workflow, since I am publishing the document, I use the ...
5
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2answers
406 views

ArcMap Draw Camera Range with ArcPy

i am working on some camera data. I have some points which consist of azimuth, angle, distance, and of course coordinate field attributes. In arcmap I want to draw shapes like this: The shape is ...
5
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2answers
2k views

Efficiency of python script using SAGA and arcpy

=== SUMMARY === I have created a process to import a LAS point cloud, clip it, select the ground points and save the output as an XYZ.txt for clients to use. This uses a python based script (will ...
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2answers
3k views

Cannot get rid of lock on file geodatabase and feature class created in Python script

I have a python script, (for ArcGIS 10), that creates a new file geodatabase, creates a new feature class in that file geodatabase and then reads data from an SDE feature class to populate the new ...
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1answer
188 views

Is there a way to find out which pixel values are around the current pixel?

I would like to write a cycle which takes a current pixel, look at the surrounding pixels, choose the pixel with max/min value and skip to that pixel...and so on. Is there in arcpy such a function ...
5
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1answer
302 views

Does arcpy have a method for accessing related records within a cursor?

I have a line feature class that represent sampling segments. I have a data table of field notes in the same Geodatabase that is connected to the feature class with a Relationship Class. Is there a ...
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1answer
718 views

Using ArcPy to batch merge based on shapefile name?

ArcGIS 10 SP4 Python 2.6.5 I have quite a few shapefiles that are in many different directories. I'd like to pull out groups of like shapefiles, merge them, and move the results into a FGDB. I've ...
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2answers
224 views

Is there a way to increase the search radius of nearest neighbors for the Nibble tool?

I am working with a raster map vegetation types. I have about 20 types with unique raster code values that can be sorted into three classes: 1 - vegetation types I want to expand using the nibble ...
5
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1answer
198 views

parallelization of raster mosaic

I would like to create a raster mosaic of the national USGS NED 30m DEM (~50 GB). I'd like to leverage parallel processing using python multiprocessing module where possible. I'm using ArcGIS 10.0. My ...
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1answer
174 views

Why Can't ArcPy Search the Newly Created Feature

I'm running the following tool in ArcGIS 10. I have an ArcPy Script like this: import arcpy from arcpy import env env.workspace=r"C:/sde/lcimrl.sde" fc="SDE.ATTACHMENTS\SDE.attachment_points" fcRows ...
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1answer
80 views

Is there an arcpy equivalent to IPixelBlock in ArcObjects?

Trying to figure out a way of doing this via arcpy, but don't see anything remotely related to this. My raster dataset is a GRID. 'pPixBlock is an IPixelBlock 'sets raster to be one column ...
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1answer
258 views

Adding kernel density output to map with ArcPy

I am trying to emulate the behavior of the Kernel Density tool from the ArcMap 10 GUI in a script; in other words, I want to calculate the density of a dataset, and add the visual result to a map. If ...
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3answers
1k views

Using arcpy what is the most efficient way of projecting a selection from a large data set?

I have a large data set X(x1-xn) from which I must select consecutively the attributes A(a1-an) from X.fieldsSRC or X.fieldDST and project the selections. I have a functioning arcpy script that does ...
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2answers
116 views

Efficient way to use a CSV to Define a Feature Class

I was provided an Excel Spreadsheet which had the definitions of fields for a feature class. There were several worksheets in the file, each containing field definitions for different feature ...
5
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1answer
299 views

Can ArcPy 10.1 be used to generate true curve elliptical polygons in a file geodatabase?

As background, this question arose from trying to answer a question on How to generate overlapping polygons from lines output from Table To Ellipse tool? Using the ArcMap GUI it is very easy to ...
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3answers
1k views

Merge Spatially Coincident Features in the Same Feature Class

I need a way to programatically merge grid cells (polygon 15x15m) that are directly on top of each other and add together some of their attributes. I am working in ArcGIS 10.1 with the data stored as ...
5
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1answer
704 views

Stop an arcgis model until all values are collected and then continue

This is similar to Modelbuilder - If precondition is false, continue iterating next input but I want the iterate tool to run to collect all the values and only then continue to the merge. Any ideas? ...
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3answers
1k views

What is Quickest way to Copy Single Selected Polygon from Very Large ArcSDE Feature Class?

I have selected a single polygon, which is large but not massively complex, from an ArcSDE 9.3 for Oracle feature class with 3.5 million polygons using ArcGIS Desktop 10.0 SP3. I would simply like ...
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3answers
1k views

How do I access an attribute table within a shapefile and replace values?

I would like to find a Python script that will access an attribute table within a shapefile and either update or replace records inside a field column. More specifically, I would like to use the ...
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2answers
755 views

In ArcPy, how can I save a clipped raster dataset to memory (not to file)?

I've been trying to clip a larger raster dataset by a polygon extent, where the resulting clipped raster dataset is saved in-memory. So far, my attempts produce vague errors. >>> ...
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3answers
602 views

How can I have ArcGIS not automatically add raster clip output from Python window to the current map

I have a collection of rasters that I'm writing code to automate clipping based on a user defined shapefile. I am currently doing this in the Python window using the following as the main processing ...
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4answers
474 views

How to rename a file in the output (ArcGIS python)?

raslist=arcpy.ListRasters() for ras in raslist: arcpy.ProjectRaster_management(ras,outfolder2+ras+'_Albers',spatialref2) print ras+' has been reprojected' I was using the above code for ...
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3answers
346 views

Is there anything faster than a cursor in ArcGIS to calculate records?

What is the most efficient (fastest) way to calculate records in a layer in ArcGIS? Is there anything faster than the Cursor in ArcGIS?
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2answers
795 views

Python - Check for number of shapefiles in a directory

I want to test: to see whether or not ONE AND ONLY ONE shapefile (which will be based on a filename wildcard) exists in a directory. Add these shapefiles to a list Use this list variable as an ...
4
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3answers
5k views

ArcGIS 10/arcpy: Help needed with syntax for CalculateField_management in Python script

I need to use CalculateField_management in a Python script, and the calc expression needs to concatenate a runtime variable, a string, and a field (string) value. I have searched all over for ...
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2answers
5k views

Change Symbology of layers from within ArcMap

Cheers, In an active Arc Map session - I want to change the symbology of a layer which is repeated multiple times in the mxd. Can I do this? The basic code I have for getting the layers is below. ...
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3answers
502 views

Checking if python script is run from ArcGIS (arcmap or on server) or a stand alone python script

For debugging purposes I have created a hardcoded conditional that checks it the script is run as stand alone or as an ArcGIS tool. Is there anyway to fugure this out at run time? e.g. some ...
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2answers
1k views

How to get an extent for Raster using python

I have to get an extent of a given raster so that I can save it and use the same to clip another raster with that extracted extent. As of now I am stuck in the extent part. import arcpy from arcpy ...
4
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2answers
1k views

Python method for finding a substring within a string

I converted a KML to a feature class and no longer have access to the symbology set in the original KML. I'm trying to re-create this by creating a new field that stores identifying information ...
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2answers
101 views

Selecting points on one side of the road

I am a newby in python scripting in GIS. I have 2 shapefile: first one with roads and second one with points that contains address number and street name. I want to select these points from right ...
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2answers
204 views

Is it a bad idea to convert a File Geodatabase table to a dictionary?

First, what am I trying to do? I am building a Python script that should be called from an ArcMap 10.0 toolbox. This scripts uses (among other inputs) data contained in huge gdb tables. It processes ...
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4answers
578 views

How to convert all values in all fields of table to upper case using ArcPy & Python?

Does anyone know how to use the .upper() in a stand alone python script so it can be used to change all characters in a table into UPPER case? I don't want to use the field calculator since I have ...
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2answers
1k views

How to copy selected (targeted) features to new shapefile using ArcPy?

I'm trying to copy specific attribute table rows from one shapefile to a new shapefile that will contain only the specified rows in its attribute table, that is, if a field GDP_TOP10 = 1. I'm using ...
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2answers
1k views

How to programmatically work with featureclasses from multiple geodatabases?

I have produced a Python script which creates multiple buffers of specific (listed) featureclasses within a geodatabase. This is achieved by running each feature through a for loop. I would like to ...
4
votes
1answer
183 views

Determining Shape Area Field Name

I'm dealing with a varierty of spatial polygon files (shapefiles, file/personal gdb feature classes, sde feature classes (some with spatial views)) and depending on the file type, I get a mulittude of ...
4
votes
1answer
3k views

How to Export Selected Feature to New Shapefile Using ArcPy?

I currently have a search cursor iterating through a shapefile in ArcGIS 10.1 that selects a feature and runs a viewshed analysis on that feature (and only that feature). What's the easiest way to ...
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2answers
458 views

Does ArcPy leak memory when importing CSV files?

I'm trying to import a great number of csv files of about 250MB each. I wrote a python script for that as follows: import gc import glob tables = ...
4
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5answers
799 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
3answers
1k views

How integrated can an IDE get for arcpy scripting?

I am looking to develop arcpy scripts (ArcGIS 10.1) in an IDE that is more "integrated" than Pythonwin. I would like an experience that is analagous to programming ArcObjects in Visual Studio ...
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2answers
1k views

Trouble finding YMin and YMax of a shapefile in ArcMap 10 and Arcpy

I want a python script that tells me the Xmin, Xmax, Ymin, and Ymax of a polygon. (I guess this is finding the extent of a polygon?) My current script gives me the correct the Xmin and Xmax, but it ...
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4answers
2k views

Export list of Feature classes to CSV

I am successfully using the follow script import arcpy from arcpy import env import os env.workspace = ("WORKSPACE") fcList = arcpy.ListFeatureClasses() print fcList to export feature class names ...
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3answers
2k views

Why would “import arcpy” hang Python script run from DOS/cmd prompt?

I have a very small test script (test.py) that I use to see if Python is installed and ready to use ArcPy. All it contains is: print "Starting" import os print "OS imported" import arcpy print "ArcPy ...
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5answers
385 views

Dissolving polygons fails on computers with small amount of RAM

When I'm trying to dissolve a polygon through an arcpy script the operation fails with the 999999 error on computers with small amount of RAM [~3 GB] (known issue). Unfortunately neither this, that ...
4
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2answers
193 views

Using Spatial References with ArcPy after *.prj files no longer installed by ArcGIS 10.1 for Desktop?

I'm writing a python script that uses the CreateFeatureclass_management tool, without a template. One of the required parameters is a spatial reference. I used to be able to point to the system *.prj ...
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2answers
220 views

How to store Python Add-In menu customization/configuration in *.esriaddin file?

There is a gap in my understanding of Python Add-Ins. When I create a Python Add-In it is easy to see where buttons, tools and extensions are implemented as Classes in the *_addin.py script of the ...