Python is an open source interpreted programming language used in many GIS programs.
3
votes
2answers
126 views
ArcGIS script tool: Can you have an input parameter set to optional and have the tool work when an input is not provided?
I'm building a script tool that processes shapefiles ( GPS data collected on weekly basis). The tool is set up to take an input for each shapefile ( in this case Sewer, Storm, Sign). On some days, ...
2
votes
2answers
187 views
Python code : Help with using Search Cursor and Messaging the Total Count of Items from Field in Layer that was Searched
My program works but it is not displaying a message of the total sheet count found in attribute table that the search cursor searched through. For Example: It goes through the mxd chosen by user finds ...
2
votes
1answer
109 views
How to transform KML from lon-lat to UTM (E-N), using Python?
I have a lot of KML files set as lon-lat (geographic coordinates) and want to set them as UTM (E-N) and WGS84 with Python (using arcpy, ogr, or gdal)
Does anyone knows how to do this?
1
vote
1answer
78 views
How to run “create mask” from the console?
There's a plugin called "create mask" for qGIS and trying out some simple scripting from the Python console.
I would like to call it after I select the vector features I want, then do more related ...
1
vote
1answer
97 views
Change coordinate system in multiple MXDs ArcGIS 9.3 using Python
I have to loop through some folders which may contain *.mxd files and change their coordinate system. I already found this piece of Python which should do the trick for ArcGIS 10.x (from here):
...
0
votes
1answer
102 views
'Exceptions.NameError' > “Name 'sheet_count' is not defined” Error in Python Code
I know this is something simple but for some reason I am having trouble remembering. In my code I am getting a name is not define for sheet_count. This means I would have to define at top correct. For ...
2
votes
2answers
42 views
How do I create a network from connected links
I have a bundle of links in 'some' networks. I need to find out which ones are connected to each other i.e. I need to find out which links are not connected to the 'main' network.
I have been working ...
3
votes
3answers
94 views
QGIS Python Intro Text
After reading replies regarding starting a mapping business, I think I'd better read a Python book. Any intro-level Python books to recommend?
Mila
1
vote
1answer
82 views
Using field mappings to remove fields from a merged table
EDIT: Soreted, thanks :-)
I'm trying to combine a (large) number of tables into a merged table, keeping only certain fields. I've tried the below, but it still gives all the fields. Any ideas?
...
0
votes
3answers
97 views
Summarize values per row using field calculator via Model Builder
I think my problem is easy to solve, but so far I couldn't find a solution. I have a Feature Dataset created with the Union tool in Model Builder and now try to sum up all values of one specific field ...
2
votes
0answers
61 views
Custom python datasource to QGIS
I'm working on a homebrew spatial feature data format, and using Python to write it's API.
It occoured to me that use some tool like QGIS to display my data would be very nice to have, for debug/test ...
2
votes
2answers
160 views
Extract coordinates from vector layer in PyQgis
In Qgis, I have made a polygon, and from that polygon I have made a vector grid via research tools-> vector grid. The grid covers the entire polygon.
Now I want to extract these grid points in the ...
2
votes
1answer
101 views
Programmically Populate Value List in ArcGIS Tool Interface
I'm just trying to set up the parameters in a tool I've built in ArcGIS. What I want to do is read in a feature class or table and get the values in a specific field called "SITE". The field contains ...
1
vote
0answers
43 views
Select polygons by cutting sequence with guide and sequence-dependent number
40,000 polygons with randomly distributed ID's are to be numbered in ascending order in a field of a table. The order of the numbering is defined by the direction of the guide. Is there a solution? ...
2
votes
2answers
81 views
Using select by location to update a field in a feature class
I am using Arc 10.1 and I am working on a script that takes a value from a field within one shape file and updates a field in another shape file based on its location. Basically I have smaller parcels ...
1
vote
0answers
38 views
Python Program for “QC of PDFs Created from Data Driven Pages”
I need some help. I am fairly new to Python. I found a sample code and I need to change a couple things in it for it to work. I need it to make sure that all PDFs were created from the Data Driven ...
8
votes
1answer
228 views
How to find differences between shapefiles?
Every month I have to QA/QC some streets data for an entire county (over 47,000 records). The first step is to compare the two files. Currently, I'm using a tool that was created in house via VBA ...
0
votes
1answer
75 views
How Could I Calculate Shortest Path ?
I am working on QGIS - 1.8 Version and frequently getting an error while using Road Graph and Shortest Path Opetions.
Kindly Suggest or provide solution..
With Regards
Prashant Persai
0
votes
1answer
107 views
How to refresh a Combobox Add-in in ArcGIS 10.1
I need to refresh the value in the combobox after an event from other tool in the same add-in (ARCGIS 10.1. Python).
I've changed the value of the combobox with the code: combobox.value = val
and I ...
3
votes
0answers
75 views
How do I write XML metadata with Python?
Some Python software I have written generates raster files via GDAL. I would like the software to create an XML metadata file for each raster so that I can include details about how the raster was ...
0
votes
0answers
45 views
Python code help for Program that “Reads a field in Feature class and Compares to PDFs Created from Feature Class” [closed]
I have a code that I found and I want to arrange it to do what I need it to do. I need some help making sure my correections will work. This program I think by what I read is searching through the mxd ...
0
votes
0answers
71 views
Help with Python Script “name 'path' is not defined” Failed to execute [closed]
I need someone to please check my code so I can understand how to fix it. This code is written so that a user can select an mxd, select the feature class of that mxd (to get a field that is filled ...
4
votes
1answer
84 views
Programmatic raster-vector calculation
I currently use GRASS' r.mapcalc to find the difference between vector and raster data using a loop and temporary files and layers.
Is it possible to do the core calculation between raster with a ...
0
votes
0answers
35 views
SQL statement in MakeTableView_management
EDIT: Finally found a way around this..
expression = "[Route] = '" + route + "' AND [Trip] = " + str(trip)
arcpy.MakeTableView_management(solutionTable, "solutionView", expression )
I tried str() ...
2
votes
2answers
117 views
Calculate Percent coverage using another raster, with dif resolution and orientation
I have a 0.5 meter raster that defines presence or absence (cells are either 1 or 0). I have another 5 meter raster, which I created. I would like to calculate a percent coverage of the underlying 0.5 ...
3
votes
1answer
136 views
Arcpy does not execute “CopyFeatures_Management” to write a featureclass to an ArcSDE database
I have some problems with my Python script. The script gets an JSON with different information about images. The information includes general information about images and also the gps position of ...
2
votes
1answer
78 views
Select and zoom python script
I am attempting to make a simple select and zoom python script for my address points. Currently the script will complete successfully but will not select or zoom to the entered point. I am using two ...
3
votes
1answer
53 views
Python program for “Comparing total number of pages of an mxd to total number of PDFs created from that mxd”!
I need some help on my program. I have the parameters set to ask user to pick an mxd and the folder where those data driven PDFs are located. I started with Search Cursor to create a list from the ...
0
votes
0answers
37 views
Installing ActivePython in ArcGIS Python Directory?
I want to install ActivePython on my computer, but I also have Python 2.7 pre-installed with my ArcGIS 10.1 version.
The directory for the .dll's and such is:
C:\Python27\ArcGIS10.1
ActivePython ...
1
vote
2answers
98 views
Select Layer by Location - Arcpy - Why are my inputs being interpreted as invalid?
I am working on a tool in a python toolbox and am totally confused about what is going on and causing my select by location operation to fail (Error 000368).
I am trying to select the features in one ...
2
votes
1answer
106 views
how to add a query layer to a mxd in a python script
I want to add a query layer to an arcmap document so that whenever i have a db data update, it is reflected in my ma and I can update my service through python script. This is my script so far...
...
4
votes
1answer
80 views
Arcgis Stop Working with my Loop Scrip (Could Be Memory)
I am having issues with my scrip, because it makes my computer very slow after 15 loops arcgis 10.1 and explorer.exe crashes. But instead of this, i can see my 15 pdf files saved correctly and i need ...
4
votes
1answer
94 views
Slow performance on splitting a shapefile by attributes
I've tried to develop some workflows with the ArcPy module for splitting a shapefile based on the unique values in a specified field. The code works as expected except one thing I am not able to ...
4
votes
1answer
80 views
How change border line to no pen with python console?
From Python console I load a shapefile with qgis.utils.iface.addVectorLayer. How I can remove border lines (change to no pen) in the active layer?
3
votes
2answers
145 views
Majority filter (minimum mapping unit) in ArcGIS with larger window size
I want to run the majority filter in ArcGIS with a window size of 4 or 5 i.e. greater than the default 3. Is it possible? Or some other command (or tool) which might help me achieve that?
thanks!
1
vote
1answer
145 views
Data Driven Pages, Graphs, and selections in ArcMap 10.1
Is it possible in python to create a selection set based on the extent from a Data Driven Page (DDP)? I have a layout view with a map and a graph. The graph is set to only plot the selected set of ...
1
vote
0answers
47 views
Script Tool Problems ArcMap 10.0
I Have a scipt tool that runs when input shape files are added from the table of contents (added from drop down menu.) However this tool will not run when they shape files are added using the add file ...
5
votes
2answers
111 views
Exit Python script in ArcGIS 10.0
I have a script with an bail-out function like so:
def die():
from sys import exit
exit()
Occasionally in the script I check a condition and exit if necessary. This works great in 10.1, ...
2
votes
1answer
64 views
Updating and inserting a field within the same loop
I am working with an empty feature class where I am writing a script to create polylines within the featureclass and attach an associated text value with the polyline.
I am using a for loop as noted ...
1
vote
1answer
177 views
Arc 10 Python .shp attributes - usings fields to populate other fields - if/then/else statement
Ive been looking for a solution and unable to find one so please help if able:
I'm trying to avoid manually inputting Begin and End engineering station values already inputted into a seperate field. ...
5
votes
1answer
73 views
Cursor only completes one loop
I am at the end of my rope here. This cursor runs fine for one iteration and then stops. It doesn't throw an error, it just completes. There are 3,000 rows in my table, so I don't know why it would do ...
1
vote
1answer
116 views
Need help in Python script : Getting an unicode encode error
When I`m running a script (it checks to which database a mxd is connected) I get the following error:
return codecs.charmap_encode(input,errors,encoding_table)
UnicodeEncodeError: 'charmap' codec ...
3
votes
1answer
61 views
How to add Oracle database connection to AnalyzeforMSD script?
I use this script right now:
import os, arcpy
directory = r"C:\Project"
for root, dirs, files in os.walk(directory):
for myFile in files:
fileExt = os.path.splitext(myFile)[1]
if (fileExt ...
2
votes
1answer
144 views
How to access all mxd files in a folder?
I'm a beginner to Python and am trying to figure out how I can access several mxds in a folder. For example, when I want to use the AnalyzeforMSD function in ArcGIS:
import arcpy
mxd = ...
0
votes
1answer
77 views
How to update element text in arcpy.mapping? [closed]
I have a problem updating a map element text (named element1) in a map document using the following code:
a1 = '"' + ("element" + str(1)) + '"'
for elm in arcpy.mapping.ListLayoutElements(mxd, ...
6
votes
2answers
221 views
Converting KML files for use with Python library Shapely
I am trying to get a KML-file (wijken.kml) into Shapely. The KML-file is validated against the proper XML schema, so I guess the input is correct.
Routes I have tried:
1) Converting to WKT or WKB ...
2
votes
1answer
88 views
Intersection of convex polygons on a spherical surface
There are a number of algorithms available for the intersection of two convex polygons, but I am interested in an algorithm to find the intersection of two convex polygons on the surface of a sphere, ...
0
votes
1answer
129 views
how to install networkx python in QGIS
How to install and how to compile networkx python on QGIS?
I always get an error that no module named networkx in the console of QGIS
I copied the file networkx in C:\Program Files\Quantum GIS ...
4
votes
2answers
268 views
How to write Shapely geometries to shapefiles?
Can someone demonstrate a simple way to write geometry data-structures from shapely into shapefiles? I am particularly interested in polygons with holes and linestrings. It would also be beneficial to ...
2
votes
1answer
138 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 ...
