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

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138 views

Creating numpy.array with variable number of fields to test arcpy.da.ExtendTable performance?

There was an ArcPy Café blog posting entitled Adding Fields: Performance Tips which advocated: Two approaches to help increase performance when adding numerous fields to a table or feature ...
5
votes
2answers
971 views

How to replace arcpy.CalculateField_management with an update cursor?

I'd like to replace this expression arcpy.CalculateField_management(bufferFile, "Shape_Area", "float('!shape.area@squaremeters!')", "PYTHON") with an arcpy.da.updatecursor. The reason for this is ...
5
votes
1answer
257 views

What is the most efficient way to get a list of featureclasses from a large ArcSDE database?

I have a SDE DB which consists of 40 feature datasets and around 300 featureclasses. I need to get the full list of all featureclasses whose name does not contain "ARCHIVE". It takes several minutes ...
5
votes
3answers
566 views

Convert polyline with Left ID and Right ID to polygons with ID

I have a polyline shape file which contain Left Id and Right ID information and struggling in converting this polyline layer to polygon with ID via arcpy. I am using ArcGIS(editor) license so feature ...
5
votes
1answer
193 views

How to get the editor's current layer in ArcPy?

In ArcObjects, it is possible to retrieve the currently selected editable layer using IEditor3.CurrentTemplate.Layer, or IEditLayers.CurrentLayer. Is it possible to do the same thing in ArcPy? In ...
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2answers
180 views

How to check if Waste-Water Manhole connect to lines with the right flow direction?

I have a waste-water geometric network with flow direction throw digitize direction. I want to check if each manhole have a line flowing in and a line flowing out. Is there an attribute of line vertex ...
5
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2answers
952 views

How to copy an SDE geodatabase to a file geodatabase using Python?

I would like to make an exact copy (domains, feature datasets, feature classes, etc.) of an SDE database to a file geodatabase. I have tried several possibilities, including: using the Copy (Data ...
5
votes
1answer
439 views

How to arcpy.Describe() a layer when script is run from outside of ArcMap?

The following code will work if I run it from the ArcMap Python dialog, or from a GP tool, but not from PyScripter IDE: import arcpy mxd = ...
5
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2answers
323 views

SelectLayerByLocation not Selecting

I have been trying for some time now to create a script to extract the polygons within an extent, but am unable to get the same result as when I use the user interface manual method. Maybe someone ...
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3answers
2k views

Table to table script using Excel sheets (not workbooks) arcpy

So what I'm trying to do is to create feature classes from the sheets in an Excel table. I can get it to work if I save each excel sheet as its own workbook, however this isn't really what I want. I ...
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3answers
251 views

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 ...
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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 ...
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2answers
837 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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2answers
823 views

Permanently replace/update server/service in each ArcSDE Layer in MXD?

Using the mxd.findAndReplaceWorkspacePaths method, if and MXD is updated and the path the the .sde connection file moves again all of the data sources will break again. Is there a method to ...
5
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1answer
218 views

Is it possible to install ArcPy on a server for use in a geoprocessing web application?

I have a website on my intranet and would like to add some geoprocessing tools to it with Python. Many Users will not have Arc installed on their machines, so I think I need to have the scripts set ...
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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. ...
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1answer
564 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 ...
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2answers
390 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
votes
2answers
1k 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
2k views

Installing ArcGIS 10 with Python(x,y)

EDIT 10/20/2011: The problem I was having below was caused by trying to install Python(x,y) after ArcGIS 10. I got a new machine yesterday and instructed IT to install Python(x,y) 2.6.5.3 (has ...
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2answers
2k 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 ...
5
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1answer
124 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
votes
1answer
210 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 ...
5
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1answer
569 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
201 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
162 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
76 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 ...
5
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1answer
241 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 ...
5
votes
1answer
2k views

Lidar - Automated building extraction (Improve Process)

I have the following process for automatically creating building outlines/footprints from Las files and was wondering if anyone can help improve it or has suggestions for other processes to use? ...
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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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1answer
204 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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1answer
709 views

Get shortest distance between two geometries in ArcPy

I'm using ArcPy and using a cursor to step through one polygon feature class. For each of these 'source' polygons, I am creating a SearchCursor to find all polygons in a second feature class that ...
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votes
3answers
994 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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1answer
1k views

arcpy: Compare extents of rasters

I am writing a script that takes an input of an Area of Interest (AOI) and then walks through the base directories to find any file that has an extent that intersects with the AOI, clip it and ...
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6answers
1k views

How to move / offset point locations using ModelBuilder or ArcPy

I have a number non-georeferenced CAD layers (see this question) that have text annotation features. I have created a model to convert the text to points, but after converting the annotation to a ...
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votes
3answers
956 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 ...
4
votes
2answers
625 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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4answers
383 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 ...
4
votes
1answer
1k views

Cast arcpy result as an integer instead (arcpy.GetCount_management)

I am trying to get a number by counting how many points are in a shapefile. And this works (I think), except I then am running into trouble using that number somewhere else. Eventually, I'll be using ...
4
votes
3answers
313 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?
4
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2answers
709 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
votes
3answers
4k 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 ...
4
votes
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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3answers
516 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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2answers
165 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 ...
4
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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 ...
4
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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
4answers
286 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 ...
4
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1answer
147 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 ...