Tagged Questions

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

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2
votes
1answer
162 views

Does arcpy.AggregatePoints_cartography create multiple polygons?

Does this function allow you to put in an array of points, which may, or may not, be representative of many polygons, and create many polygons from it, or just the one, linked?
2
votes
0answers
588 views

Spatial Analyst Cell Statistics seems to give the wrong answer in ArcGIS 10.0

I have a script that calculates standard deviation for a list of grids using the Cell Statistics function in Spatial Analyst for ArcGIS 10.0 The syntax is this: stdevGrid = ...
7
votes
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 ...
4
votes
1answer
5k views

Thiessen Polygon delineation within a Feature

I am trying to create Thiessen (Voronoi) polygons, based on points within a defined shapefile extent. The output should be inclusive to the feature. The output I receive now is the rectangular area ...
4
votes
4answers
650 views

Unable to save selected layer by attribute for ArcGIS Geoprocessing

I am troubles using the SelectLayerByAttribute() function for arcgis geoprocessing. I have a layer and I want to select everything that matches on a particular attribute. I call MakeFeatureLayer() ...
0
votes
1answer
60 views

Adding data at runtime into dataframes

I am trying to create an empty MXD to act as a template. I will have three dataframes for maps, each holding a different object from ArcSDE (1 raster object and 2 features). I know how to query all ...
2
votes
1answer
586 views

Is there a way to set a mask(halo) for labels in a python script?

I currently am writing a python script and using a lot of the arcpy mapping module functionality. I have been using the LabelClass of the arcpy mapping module to automate the display of labels with my ...
6
votes
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 ...
27
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 ...
2
votes
2answers
561 views

From a script tool using ArcPy, can I store a point object in a BLOB field and retrieve that point later?

I am trying to write an ArcPy script tool that will store a point object in a BLOB field that I have created. I don't know if that is even possible. If it is, how do I do it, and how can I then ...
9
votes
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 ...
3
votes
2answers
3k views

Can you create labels based on an attribute field in a shapefile with Arcpy?

I was curious if anyone knew how to access the ArcGIS label engine with arcpy? I want to be able to label point features on my map in a python loop.
4
votes
1answer
828 views

occasionally empty search cursor looping through a raster list with arcpy

I'm looping through a raster list, to export cell counts (from "Count" field in the table) to a text file, I'm only interested in cases where the field "Value" = 1, so I have included this in my ...
5
votes
2answers
2k views

How do I calculate a weighted centroid with respect to a raster, e.g. population weighted centroid

In ArcGIS 10.0, how do I calculate the weighted centroid of a collection of polygons, where I want the weight to be a raster layer. In particular I am using a raster of population counts and would ...
3
votes
1answer
2k views

Can you add dynamic text from a count of features in a layer with ArcGIS 10 ArcPy.mapping?

I am new to writing scripts, and I am trying to make a map series using ArcPy.mapping and data driven map pages. I would like to put some text on the map that updates for each map in the series ...
6
votes
2answers
2k views

Is it possible to access ArcGIS's table operations “Summarize…” and “Statistics…” in python?

ArcGIS has a few nifty table tools, including Summarize and Statistics. Is there a way to access them through arcpy, or will I have to hack my own methods via math and lists?
6
votes
1answer
1k views

ArcObjects C#: Create Random Points fails with ERROR 999999: Error executing function

I am having trouble running some ArcObjects C# code that calls create random points. I would not be doing this in ArcObjects, but I am suffering with the same issue using Arcpy as seen here: ...
5
votes
1answer
6k views

How to access data from a selected feature in ArcGIS 10?

First to describe my problem as I see it. I've been asked to design a tool that will take a selected features attributes and copy it out to an output table, with each successive selection and ...
4
votes
3answers
2k views

Creating collection of polygons from collection of points?

I have a set of points, which are spread over a wide geographical area. I need to be able to create a set of polygons which best represent the clustered points. In parts, some points may simply lie ...
1
vote
2answers
2k views

How can I insert new records to an ArcSDE feature class from a view in ArcSDE

I am wondering how I can both insert new records from a view to a feature class and update data that may be newer in the view than in the feature class. I have been fumbling around in modelbuilder and ...
7
votes
2answers
839 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 ...
9
votes
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 ...
3
votes
2answers
1k views

Is it possible to get arcpy on 9.3* or Qgis? Or maybe some of the functions?

If this isn't possible what would be the closest equivalent open source? Could parts of the module be ported to work on 9.3 or QGIS? I'm not sure if this would infringe on the license porting for 9.3. ...
4
votes
2answers
923 views

Resequencing Legend Items in Python

I create various layers programmically with Python in ArcMap 10. I can adjust how the layers are sequenced using the arcpy.mapping.MoveLayer command. But I want to have the legend reflect a different ...
35
votes
7answers
5k 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 ...
2
votes
2answers
2k views

How to recode field values based on field contents?

Is there a convenient (or even effective) method for recoding field values using the field calculator or standalone python script? In this case, I am given several unique strings to identify a type of ...
2
votes
1answer
341 views

stratigraphic ranking with field calculator?

I would like to populate a feature class float attribute with a numerical ranking of a text attribute of a geologic map. I have a field named [sheet_unit] with strings such as "H10, Q" and "J10, Pl" ...
7
votes
4answers
5k views

Avoiding import arcpy error (RuntimeError: NotInitialized) when using IDLE?

ArcGIS Version: ArcGIS 10, Python 2.6.5 Machine: Windows 7 64bit (Intel) I'm receiving the following error when importing arcpy using the the IDLE (gui and cmd prompt) and when using pythonwin. I ...
5
votes
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 ...
8
votes
5answers
6k 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 ...
4
votes
4answers
620 views

Compressing map algebra outputs from ArcPy

When creating a raster map algebra output, is it possible to set its compression? I'm creating a model which generates many hundreds of rasters, and currently each is being stored without any ...
1
vote
1answer
606 views

user select fields to be deleted in a feature class

How do I make the script below accept parameter arguments correctly in ArcGIS 10? I added it to a toolbox as a script, created parameter called Fields to be Deleted: and type as Field, but when I ...
3
votes
2answers
580 views

Enabling time aware layers using arcpy

Is it possible to enable time aware on a layer programmatically? I can add a time-enabled layer to a non-time aware data frame as shown here: ...
14
votes
3answers
9k 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 ...
3
votes
2answers
3k views

How to export selected records to a .txt file

I am working on a project where I need to create a tool/method to export the attributes of selected features to a .txt file. I have point features containing addressing information, and the tool ...
0
votes
0answers
492 views

Change from data --> layout view using arcpy? (ArcMap 10)

The opposite, from layout to data, was asked and answered, but I can't figure out how to switch to the layout view from data view using arcpy. Can it be done? Thanks.
5
votes
2answers
2k views

(New at Python Scripting) Creating a Loop so i can replace text in page layout in multiple mxds instead of one mxd at a time

I found some code on a website that will perform a search and replace on page layout text elements. Currently you can only do it one MXD at a time. I was hoping to change the code so I can do a search ...
7
votes
3answers
2k 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 ...
6
votes
2answers
5k views

How does one access a featurelayer in SDE via Python?

I am trying to use Arcpy to run the CopyFeatures_management script so that I can copy a featurelayer in SDE. What do I use for the input (and output, for that matter, since I'll be copying the layer ...
4
votes
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 ...
1
vote
1answer
308 views

Can you access ArcScan from a python script?

I'm using a python script with ArcPy in ArcGIS 10, and want to access some ArcScan functions. Is this possible? I can't see anything in the documentation about it, but I can't really find any very ...
11
votes
1answer
987 views

How can I display raised error messages to the user in the ArcGIS geoprocessing results window?

Question: Can print statemnts raised from a custom exception be displayed in the gp results window? Background: I modified a script that I found that takes two inputs from a user, finds the ...
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 ...
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 ...
6
votes
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}, ...
6
votes
4answers
1k views

Raster to Polygon Scripting Problems

I am trying to make a script which selects every .png file in a folder beginning with the letters "LG". I then want the scipt create a shapefile, replacing the "LG" with "SH", and then i want the ...
4
votes
3answers
983 views

How to automatically create 2D-point features from addresses in an SQL database

I currently have an SQL-Table which contains our buildings. I already added the table and now want to create features ( 2D-Points ) from that information. The biggest problem I have is that the ...
2
votes
1answer
1k views

How to change the datasource with python?

How do I change the datasource of all layers in a map document using arcpy and python
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 ...
2
votes
1answer
497 views

Can I create a balloon callout on an address point on a published map?

Very new to this, so please excuse any ignorant question! I've created a vb.net app to open a published map in ArcReader. Have a few questions... First, I started with the query attribute sample ...