A python API created by ESRI to perform geoprocessing and layer management.
4
votes
3answers
1k views
How do I include a variable in the where clause of arcpy.Select_analysis?
I am trying to loop through a shapefile, selecting each feature in turn and copying it to a temporary shapefile to by included in a union analysis. I'm using a cursor to find the ID name for each ...
29
votes
7answers
3k 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 ...
8
votes
2answers
243 views
Create a summary table of the symbology of all datasets in multiple mxd's
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 ...
6
votes
4answers
1k 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 ...
13
votes
5answers
495 views
How to make a GIS inventory?
My office will be seeing a big change in its GIS section. This section has been operational since the 1980's and has a huge collection of GIS data (i.e., shapefiles, raster files, data, etc) but never ...
8
votes
2answers
5k 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 ...
31
votes
9answers
2k views
Alternatives to using Arcpy
I seem to use ESRI's Arcpy site package for virtually all of my python geoprocessing. To ESRI's credit, these are an incredible suite of tools that can help accomplish a great deal. However, I would ...
17
votes
8answers
640 views
What are some resources for learning Python and arcpy?
I would like to learn arcpy, but I do not know quite where to begin. Does anyone have any good advice on where I should start to learn arcpy?
13
votes
1answer
744 views
Calling arcpy/python from .NET?
Are there any available examples that show how python can be integrated into a .NET ArcGIS Addin or Extension? I have a series of python scripts that I would like to call from form events (e.g. button ...
4
votes
1answer
2k views
Setting Output Parameter in ArcPy for Server Tool
I have published the following script tool (which is wrapped in a model, i.e. just the script tool and all of its parameters) to ArcGIS Server 10. The GP service succeeds when run, but I cannot ...
2
votes
1answer
139 views
Help with Python script for exporting mxds into pdfs!
I have written a python script to export my mxd into a pdf (not using data driven pages). I am getting the error that my mxd path is incorrect! I have included my script below. Any help would be ...
2
votes
0answers
429 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 = ...
10
votes
2answers
2k views
Add a new group layer with python ArcGIS 10
Does anyone now how to add a group layer with python
can I use arcpy.mapping.AddLayer but surely this is only for an actual layer as opposed to a group layer.
so far I have this
import arcpy
mxd = ...
8
votes
3answers
4k 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.
8
votes
1answer
596 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 = ...
7
votes
1answer
458 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 ...
7
votes
4answers
3k views
How to remove a feature layer in an ArcPy Script
So, 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
1answer
296 views
Getting a constant background color for transparency
I am creating a series of tif files at 1:10k scale over a vast area (760 tiles) using arcpy.mapping.ExportToTIFF and then stitch them together to create a single ecw. The output looks ok but when I ...
4
votes
2answers
408 views
How to check if domain already exists?
I am trying to check the existence of domains in my file geodatabase which contains 4 domains (automatically populated after I created some annotation feature classes). My code is as follows:
import ...
3
votes
2answers
697 views
arcgis python script to tool issue
I have a script to investigate mxd's and save them as lyr symbology/kmz and sld which works fine when run from the .py but does not run when used as a tool from arctoolbox. I have tried ...
1
vote
1answer
135 views
Calculating mean upslope aspect
I am trying to write a python script to calculate the mean aspect upslope from each cell in a DEM. I have the general workflow down, but my final output is restricted to angles between 0 and 90 ...
9
votes
2answers
869 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 ...
10
votes
3answers
1k views
How do I use sys.exit(0) in an arcpy script to exit early without having an error message show up?
I have an arcpy tool script for ArcGIS 10.0 that has two major functional sections. The user can choose whether or not to run the second section. If the user chooses NOT to run the second section, I ...
9
votes
1answer
443 views
How to get the size of a file geodatabase feature class on disk?
Is there a simple way to determine the amount of hard drive space a feature class takes up? I feel like I'm missing something simple, but I don't recall a method that does so. You would think that ...
8
votes
5answers
1k 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 ...
5
votes
4answers
987 views
explode overlapping polygons to new non-overlapping features
Given multiple polygons that overlap in multiple ways, I would like to export from this feature all polygons that don't overlap with others iteratively. The product would be a number of features with ...
9
votes
4answers
5k views
Is it possible to use Arcpy in ArcGIS 10 to zoom to a selected feature?
The answer to this may be a simple yes or no, but I'm hoping that someone is aware of a way to zoom to the extent of a selected feature using the ArcPy modules in ArcGIS 10.
8
votes
2answers
788 views
Export table to X,Y,Z ASCII file via arcpy
I'm looking for a way to export an ArcGIS table (created with the Sample command) to a text file via arcpy. I can do this in ArcGIS via the context menu by right-clicking the table, but have not found ...
7
votes
1answer
894 views
How to find the mid-point of a line in arcpy
How can the mid-point of a polyline be calculated using the geoprocessing framework, eg in a Python script?
The polyline.centroid property returns The true centroid if it is within or on the feature; ...
3
votes
1answer
178 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 ...
2
votes
1answer
875 views
How do I insert a DATAFRAME_ELEMENT value into a dynamically generated shape file containing its extent?
This is for ArcGIS 10, Python 2.65.
I have code which captures the extent of dataframes within all mxd's in a directory. I also want it to add the dataframe name, scale and the name of the mxd it ...
6
votes
1answer
193 views
How to draw shapes with highest possible decimal accuracy
I am trying to read input of lat and long to draw the shape based on condition.The input is standard array of lat and long with 15 decimal accuracy. I am realizing - I am loosing some decimal accuracy ...
6
votes
2answers
363 views
reorder a polygon shape file (not sort)
I've written a script which produces a polygon shape file of the extents of all the thousands of rasters in our library. I want to organise the FID so that the files with the largest extents are on ...
6
votes
2answers
972 views
Change from layout view to data view using python? (ArcMap 10)
Is there a way to change from layout view to data view using python? I would prefer to do it using arcpy.
5
votes
2answers
1k 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 ...
5
votes
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 ...
4
votes
1answer
871 views
Create overlapping polygons from contour lines
Working in ArcGIS 10, I have a set of contour lines representing density of commercial square footage, and I have a set of points representing local maxima for each peak of the dataset. For each ...
3
votes
2answers
496 views
How to read MapInfo .tab files in ArcPy?
I want to use arcpy (the ESRI install of python 2.65) to analyse tab files...can this be done directly or do I need to convert them to shp files...if so would it be possible to do something like
...
3
votes
2answers
3k 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. ...
1
vote
1answer
497 views
How to use multivalue output parameter with ArcPy
how can i use multivalue output parameter with arcpy ? please give an example .
thanks
7
votes
2answers
1k views
Rotate features in ArcGIS 10
I have a series of polygons that I want to rotate. Each polygon has a rotate angle field and an anchor point xy coordinate fields. All anchor point xy's are on a node of the polygon. What is the ...
4
votes
2answers
405 views
clipping a raster by multiple datasets or polygons
another newbie question from me.
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 ...
4
votes
2answers
328 views
Arcpy remove invalid character
I've built a model that takes the name of the Excel worksheet containing xy data, and uses that name as the name of the output shapefile. ( Worksheet "massachusetts_sightings" in an xlsx becomes ...
4
votes
2answers
1k views
ArcGIS 10 Python script to search directories and subdirectories for intersects and clip them
I'm trying to develop a tool that queries our company's data stores for any data that intersects a feature. So when we acquire a new property we can run this tool and it will find all of the data we ...
4
votes
1answer
378 views
Can you use arcpy.RasterToNumPyArray() to Graph a Raster with matplotlib?
Can you use arcpy.RasterToNumPyArray() to Graph a Raster with matplotlib?
I'm looking to graph a raster with X, Y, and Z values in a 3D bar graph. I just can't seem to translate the numpy array to ...
3
votes
1answer
2k views
How to sort a feature class and then calculate a sequential ID field?
I am in ArcMap and I want to sort the records based on a field and then do a Calculate Field with an auto-incrementing value with the sort in-place. Any ideas?
It looks like I could get an update ...
2
votes
2answers
51 views
Create line from two points, two different feature class
I'm attempting to automate this in ModelBuilder in ArcMap. I have one feature class with one point (Start) and one feature class with multiple points (Destinations). I want to iterate through the ...
2
votes
1answer
178 views
How to buffer a point in a Python Add-In by ArcMap's selection tolerance?
In this answer to another Python add-in question I suggested supplying a search_distance to the SelectLayerByLocation function in order to allow points and lines to be selected by an intersecting ...
2
votes
2answers
438 views
ESRI Geoprocessing Script : Runs Fine in Desktop - Crashes as Geoprocessing Service
I have a small and simple geoprocessing script that I am trying to expose as a geoprocessing service in ArcGIS Server 10 SP4. The script is below. Pardon the hard-coding...
With the hard-coded ...
2
votes
3answers
2k views
Add feature layer to display with in a script tool for desktop mapping 'App'
The point of this question is to find a way to programatically change the map extent based on user input. My method involves creating a Feature Layer & Selection, but if you have another ...
