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

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10
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2answers
262 views

Count raster value in a bounding box (spatial extent)

I have simple question: given a bounding box, how can I count the number of specific values (say, I am interested in the number of value == 1 ) in a raster in 1) arcpy, or 2) raster package in R?
10
votes
2answers
5k 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 ...
10
votes
4answers
3k views

ArcGIS 10.0 Python SearchCursor file locking

I have a script that gets a value from a shapefile's field to return to the user. It seems that only when the arcpy.SearchCursor is called ArcMap locks the file and it doesn't get removed after the ...
10
votes
1answer
3k views

Python Script to Create Table Using Data Driven Pages

I am trying to convert some python script to display a table (based on a dbf) of features located within a specific data driven page. So far, I have the script successfully able to refresh the map to ...
10
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2answers
769 views

Metadata -auto build using python

We have a large (10,000 plus) repository of spatial data (shp/gdb/tab vectors and ecw/tif rasters and also las, xyz and DEM data) where some have metadata records in xml using anzlic metadata editor. ...
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2answers
1k views

Why is this simple arcpy script so painfully slow?

I have a simple arcpy script to update a field in a point shapefile with info from the polygon feature that it is within. It takes 9 minutes to do 100 points in arcpy but a spatial join in arcmap is ...
9
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2answers
883 views

How to bypass errors in arcpy for/while loop?

I have a handy script tool that loops through a workspace and renames and copies shapefiles to a feature dataset. However, if there is a corrupted shapefile somewhere in the workspace the script ...
9
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3answers
9k views

How to create a shapefile in ArcGIS 10 using arcpy?

How can I create a shapefile using Python in ArcGIS 10? I have lat & long. From this I need Python code which will create a shapefile and display it in ArcGIS 10. Thanks.
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5answers
468 views

How to improve performance when using ArcGIS cursors in Python with big tables?

I have a pretty big point feature class in a file geodatabase (~4 000 000 records). This is a regular grid of points with a 100m resolution. I need to perform a kind of generalization on this layer. ...
9
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2answers
4k views

How to get list of selected features in ArcGIS for Desktop using Python code?

I have a question regarding selections in ArcGIS for Desktop. Assumed I have one layer in ArcMap and I have selected two of five features. Is it possible to get a list of all selected features by ...
9
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3answers
1k views

Speeding up Python calculated timestamp field in ArcGIS Desktop?

I am new to Python and have started to create scripts for ArcGIS workflows. I am wondering how I can speed up my code to generate an "Hours" double numeric field from a timestamp field. I start with ...
9
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6answers
546 views

How to programmatically check if the number of shapes = number of table records?

I have a handful of approximately 1000 shapefiles that are corrupted (see attached error message). The shapefiles were generated from eCognition Developer 8. There is a script tool that seems to ...
9
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1answer
2k views

How to create sidebar help information for Python script tools of ArcGIS Desktop?

I have been creating custom tools (Python script tools) using Python with the ArcPy module. I can set up the tool successfully with parameters and all, but I cannot figure out how to create help ...
9
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2answers
2k views

Is there a ArcGIS python script development API?

I'm a somewhat experienced software engineer new to the GIS world. I started working on a GIS project that supports ArcGIS 9.3 and 10.0 and looking through existing code it looks like the main ...
9
votes
1answer
6k views

How to create a script tool that will create a copy of a feature class and offset it by a given distance? (arcpy)

I want to duplicate a polygon feature class and offset all of the polygons by about 10 feet in both the x and y directions. I asked if there was any way to do this last week, and I was informed that I ...
9
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2answers
228 views

How to count zero values in a table in rows and write it to new field?

This is a very simple task to do but I can't understand the right syntax. I have a shapefile whose attributes are similar to the following: FID Shape FIELD1 FIELD2 FIELD3 ... 0 Polygon 0 1 ...
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2answers
8k views

Change data source path in .LYR files in Arcgis 10

How can one change the source data paths for every layer file in folder X using arcpy? I've followed Updating and fixing data sources with arcpy.mapping as best I can, yet all I get is an unhelpful ...
9
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1answer
4k views

“Field Mapping” in ArcGIS 10 - ArcPy

I've wrote a Python script that does a spatial join and some simple calculations. My problem is with setting the merge rule for one specific field, and leaving the rest of the fields as is. For ...
9
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2answers
1k views

How can I crawl directory tree and change Mxd relativePaths to true?

I have a large number of project folders where each project folder can have many subfolders. These subfolders can contain mxds, shapefiles, personal gdb's and fgdb's. In many cases the user forgot ...
9
votes
1answer
354 views

Is there a way to use ArcPy and PyGRASS tools in the same Python script?

I´m trying to write a Python script, that includes different ArcPy / ArcGIS commands and want to combine it with GRASS geoprocessing tools. Unfortunately importing the GRASS libraries doesn´t work. ...
9
votes
2answers
489 views

Generate near table for x number of neighbours using arcpy

There are 3 likely scenerios that I am trying to capture near distances for: An interchange subway station, which has 2 or more neighboring stations. That is, the station in question connects 2 or ...
9
votes
4answers
241 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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4answers
3k views

How to create arcs between two points in Python?

I've been working on an python script automating the visualization of live point data. I have a table with two coordinate pairs. I'd like to connect these two point with an arc of a circle or similar ...
8
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4answers
274 views

Subset Folder Contents ArcPy

I have about 1500 .txt files within a folder named 3410001ne => 3809962sw. I need to subset about 470 of these files to process with a Python script. Below is the section of code prior to my for ...
8
votes
5answers
7k 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 ...
8
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2answers
324 views

Does dissolving features improve geoprocessing efficiency?

I have a large set of line data (>140,000 features). Is there a processing advantage, in either time required or (more importantly) memory used: to running Dissolve on the data before running ...
8
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2answers
3k views

Finding mid-point of line using ArcPy?

How can the mid-point of a polyline be calculated using the geoprocessing framework, e.g. in a Python script? The polyline.centroid property returns The true centroid if it is within or on the ...
8
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6answers
3k views

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
votes
1answer
1k views

Creating table containing all filenames (and possibly metadata) in File Geodatabase?

I need to create a metadata-table for all files in a File Geodatabase or Spatial Database. It would be awesome if it were possible to automatically be updated with new filenames, and possibly even ...
8
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3answers
439 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?
8
votes
2answers
870 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
votes
1answer
563 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). ...
8
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2answers
2k views

How can I more efficiently select related records?

Below is the code I'm using to replicate the "related tables" button in ArcMap. In ArcMap that button selects features in one feature class or table based on the selection of features in another ...
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4answers
679 views

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 ...
8
votes
2answers
364 views

Is there a way to refresh imported modules in a ArcGIS Python Toolbox?

When using a python toolbox (.pyt) in ArcMap, I'll typically follow a pattern where the .pyt file itself is simply a wrapper to collect input arguments and define the tools themselves. Supporting ...
8
votes
2answers
2k views

How to reclassify a very large land cover dataset?

Consider the NLCD2001 Land Cover dataset for Alaska (download link). I need to reclassify this dataset so that only pixels of value 41, 42, and 43 are preserved; all other pixel values should become ...
8
votes
1answer
174 views

The role of '#' in a python 'if':

I recently exported an ArcGIS model to python and was reviewing the script and am confused by the following line: if TRU_W_DatableFeatures == '#' or not TRU_W_DatableFeatures: I can't seem to find ...
8
votes
4answers
1k views

How to split points by polygon?

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
votes
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: ...
8
votes
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 ...
8
votes
2answers
278 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
votes
1answer
193 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 ...
8
votes
2answers
539 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
359 views

How to determine storage type (ST_Geom/Oracle) from arcpy/python

We're migrating some feature classes from SDELOB (or some older binary format) to ST_Geometry. As we write our arcpy script to use the ESRI Migrate Storage Tool we'd like to test whether or not ...
8
votes
2answers
3k views

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 ...
8
votes
1answer
1k views

arcpy.geometry __geo_interface__ and AsShape() function: loss of precision and holes

I'm serializing my arcpy geometries as geojson so that I can 'hydrate' them back as geometries later and I'm having 2 problems in the cycle.: PROBLEM 1: Precision R0 = ...
8
votes
1answer
191 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 ...
8
votes
2answers
557 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 ...
8
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0answers
339 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 ...
7
votes
3answers
4k 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 ...