Questions tagged [python]

Python is an open source interpreted programming language used in many GIS programs.

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4
votes
1answer
388 views

Variable XML dataset as reader in FME

I have one problem i am thinking how to solve. My workbench is started from python script. Workbench reads xml file, but name of xml file is each time different. So is it possible to solve this with ...
3
votes
3answers
2k views

ArcMap 10.0 Python script tool - Have the script tool dialog box stay open past successful completion of script

Is there a way to have the script dialog box have the radio button that says "Close this dialog when completed successfully" unchecked for any user who runs the script tool? Is there configuration ...
4
votes
2answers
591 views

Importing GDAL in Jython?

I'm trying to use jython with GDAL on Windows. Python and GDAL are installed through MS4W and work perfectly together. Jython is installed manually, but I can not import GDAL. I tried to update sys....
2
votes
1answer
14k views

Python :ImportError: DLL load failed: The specified module could not be found

I am working on Python plugins for QGIS. I set my variables as PATH :=C:\OSGeo4W\apps\qgis;%PATH% PYTHONPATH:=C:\OSGeo4W\apps\qgis\python But when I try to run my .py file in IDLE I get an error ...
11
votes
2answers
1k 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. ...
2
votes
2answers
560 views

QGIS 1.7.3 and pyqt4 version mismatch

I installed QGIS 1.7.3 using OSGeo4W installer.I have python 2.7 and pyqt4-py2.7 installed on my system.My system paths are: PATH:C:\OSGeo4W\apps\Python27\Lib\site-packages\PyQt4\uic;C:\Python27\...
4
votes
1answer
1k views

Can I delete only tables, or only objects sharing a string of text, from a geodatabase?

I've got about 1000 tables in a geodatabse that I need to delete. They are named IntersectedBuffers_1, IntersectedBuffers_2, etc, and they're the only tables in the database. Could someone please ...
3
votes
1answer
1k views

The minimum bounding circle of geometry that crosses the 180th meridian

Background: I've been given a task where I have to calculate the minimum bounding circle of Alaska (for the purpose of running a Roeck test). I'm using the Census' state level geometries available ...
6
votes
2answers
1k views

Accessing non-spatial PostgreSQL tables using OGR Python bindings?

When connecting to PostgreSQL/PostGIS using the OGR Python bindings is it possible to get non-spatial table names (i.e. OGR layers) from the connection? Currently, doing: conn = ogr.Open("PG: #...
4
votes
1answer
1k views

Run FME Workbench with Python

I would like start/run FME workbench from one external python script. Is there some simple syntax/command to do this?
1
vote
1answer
480 views

GDAL Tiling, Missing Tiles

i have used gdal2tiles.py for tiling about 100 tiff tiles which i have generated virtual dataset with gdalbuildvrt for my 1:250.000 scaled maps... everything goes well from 15 to 11, but when it ...
0
votes
1answer
1k views

libmysql.dll-procedure entry point error [duplicate]

Possible Duplicate: How to fix QGIS error “Entry Point could not be located”? I am working with qgis,pyqt4 and python2.5. I was getting error qtcore4.dll could not be located.so i set ...
0
votes
4answers
526 views

Resolving Arcpy “GetObject not point” Error

I'm new to Python (v 2.6.5) and am trying to write an ArcMap (10) script that reads the vertex coordinates of a polygon shapefile which includes a small hole (doughnut polygon). I've been working ...
1
vote
1answer
15k views

How to fix Qtcore4.dll can't find procedure entry point? [duplicate]

Possible Duplicate: How to fix QGIS error “Entry Point could not be located”? I am working with QGIS, python2.5 and pyqt4 for py2.5. My system variables are as follows: path:=C:\...
0
votes
1answer
242 views

Insert cursor raises exception on geodatabase

world, I'm having trouble to insert a line geometry into a personal geodatabase (using Python/ArcGIS 9.3.1). Everything works fine if the target feature is a shapefile. My guess is that calling: ...
4
votes
2answers
2k views

arcpy: check for same record in cell above and below

After using the find duplicates in arcmap 10, I want to check if the feat sequence ("find duplicates" marks all records with the same attributes with the same number [in "feat_seq"] and creates a ...
1
vote
1answer
444 views

GeoDjango 'NoneType' error when using 'distance' function

I have a site that's working on our staging server but after copying it to the live server I am getting the following error when trying to perform a distance() call (code cut down to minimum) >>...
2
votes
1answer
657 views

How can I, in a general way, rescale a raster in ArcGIS Model Builder

What I want to do is rescale a few rasters from whatever they are now (i.e., values between -99 and +1000 OR -256 - +256 OR 0 - 3.23) to a normalised value (i.e. values between 0 and 1). I would ...
1
vote
1answer
9k views

Cause of expected an indented block error in Python script?

I have been trying to list all the field names of a shapefile but it is showing 'expected an indented block'. What should I do? import arcpy fieldList = arcpy.ListFields("C:\Users\Mridul\Documents\...
3
votes
1answer
1k views

How do I perform one-step transformation in python?

I would like to perform transformation for this example data set. I have here four pairs of adjustment points and want to transform given point coordinates from primary system to secondary system ...
2
votes
1answer
5k views

how to calculate RMS 2D and RMS 1D, using python?

I would like to calculate: RMS 2D: standard deviation for the two coordinates of flat (67% confidence level) and RMS 1D: standard deviation for height (67% confidence level) What is the formula and ...
8
votes
3answers
5k views

Mapping between OGR and Python data types?

I'm writing a shapefile using OGR in python, creating fields on-the-fly from a python data source. Creation of a new field requires an OGR data type, is there a mapping between OGR and python data ...
5
votes
1answer
3k views

How to use QGIS Time Manager sample data?

I've downloaded the Time Manager plugin for QGIS for Windows, version 1.7.1. I'm not sure whether I should really be asking a question on here, but since there doesn't seem to be an issue tracker on ...
12
votes
4answers
616 views

Mirror of Michigan State University's Python geoprocessing course materials

Been learning geoprocessing with Python using MSU's GEOG 825 ( python geoprocessing ) course. Unfortunately the link is dead now. I know this is a long shot but does anybody have a copy of the ...
1
vote
1answer
786 views

Using cursor.execute() with PostGIS

I do not understand how the operator works some times. Here is an example that works, "SELECT ST_Distance(ST_GeomFromText('POINT(-3.16496271127842 55.9262620593642)'),ST_GeomFromWKB(a.geometry)),...
1
vote
1answer
3k views

Radius of Curvature Python/Arc, how access x,y coordinates

I have a polyline in ArcMap 10 and I am able to script the length of the line in Python using this bit of code: #Calculate Radius of Curvature #try: # Import system modules import sys, string, os, ...
1
vote
2answers
685 views

Python Mapscript 6.0.1 layer.getShape API

I am attempting to follow the mapscript example described here - http://trac.osgeo.org/mapserver/wiki/RasterQuery but ran into some trouble with s = layer.getShape(result.shapeindex, result....
4
votes
3answers
5k views

Using QGIS with a pre-existing installation of Python 3.2 and matching GDAL

I need to have GDAL/OGR working with Python 3.2 because of another dependency. However, I also want to have QGIS for convenience. However, QGIS - FWTools in particular is built against Python 2.5, ...
3
votes
2answers
4k views

How to refresh QgsMapcanvas?

I am using Qgis 1.7 and I want to refresh the mapcanvas so I am using refresh() function of QgsMapcanvas class and Nothing is happening to the Map Canvas. I am using Python for customizing
3
votes
2answers
3k views

Running external exe in Python? [closed]

I would like to run an external executable written in fortran which provides one of the inputs inside a python code. Is it possible to run that exe inside Python script?
2
votes
3answers
1k views

Accessing GEOS functions in Python

The issue: I am using Windows 7, 64-bit operating system with Python 3.2. I must continue to use Python 3.2 because of a dependency with another API. I need some functions in GEOS that are not ...
1
vote
1answer
690 views

Copying and renaming files on SDE connection

I have a script that renames and copies files (feature classes) on an SDE connection. This script works just fine if the feature class name does not start with an 'S'. If the feature class name does ...
4
votes
2answers
1k views

Update Multiple Metadata Tags at Once

ArcGIS 10 SP3 I have read the other posts in this forum about updating metadata programmatically, and have examined Esri's help topics regarding xslt stylesheets to update metadata, but am hoping ...
3
votes
1answer
2k views

Buffer Selected Line Segments Using ArcGIS 10 or Python

I haven't quite found a solution for buffering selected line segments of a road network without extporting the selected line segments to a new file and then buffering. I want to avoid creating a ...
4
votes
2answers
3k views

ArcGIS Geoprocessing Services - Don't work if 'Run python script in process' not checked

I have a standard geoprocessing toolbox that I am exposing as a geoprocessing service. The tools in this toolbox are plain 'ol python scripts. All of this is being done in ArcGIS 9.3.1. As a ...
8
votes
2answers
3k views

Converting File Geodatabase Table to Access 2007 ACCDB table programmatically?

Does anyone know of a method to convert a File Geodatabase Table into an Access 2007 Table programmatically. I have been trying using the PYODBC library and a series of insert statements but am ...
3
votes
1answer
871 views

Perform Multiply (Times) function on several reclassified rasters using Python

I have several reclassified rasters (0 = snow cover, 1 = no snow) and I would like to use the multiply function on all rasters that have the same spatial extent. In ArcGIS 10 this function can be ...
2
votes
1answer
785 views

Search Raster Files from Folder that Have Same Spatial Coordinates Using Python

I have approximately 700 raster files in a single folder and I need to find files that have the same spatial extent and copy to a different folder. The raster files measure daily snow cover and ...
10
votes
6answers
12k views

Starting and stopping ArcGIS Server map services using Python?

Is it possible to programmatically stop and start ArcGIS Server map services using Python?
3
votes
2answers
3k views

Batch Processing 400 MODIS HDF4 Files Using Several Tools In ArcGIS 10

This is my first post, I hope I don't screw it up. We have about 400 MODIS HDF4 files we are looking to batch process in the ArcGIS 10 or Python environment. The tools we are looking to use are ...
12
votes
1answer
2k views

Automating roof orientation detection from satellite imagery?

A while ago I did a neighbourhood roof orientation survey for solar panel deployment, by visually checking each roof and marking individually whether they were south or almost south-facing. As this ...
4
votes
1answer
2k views

Multiple Conditional Reclassification - ArcGIS

This is a question out of curiosity rather than a problem as I am not the most experienced with raster datasets and I wonder if there is a better solution to my current approach. I am trying create a ...
3
votes
1answer
2k views

Parameters for python script: how to provide a user interface that lists a tool's available value options?

I have several scripts that I have working from inside PythonWin. I am now experimenting with running these from inside ArcMap 10.0 so I can have a user define the parameters of the script. An ...
20
votes
3answers
9k views

Smoothing/interpolating raster in Python using GDAL?

I am developing in Python and using GDAL from OSGEO to manipulate and interact with rasters and shapefiles. I want to take a shapefile that has point features and interpolate it into a surface raster....
1
vote
1answer
371 views

Problems with python postgis polygon

I have a problem with the examples in the book "Python Geospatial Development". I can't write to the PostgreSQL database polygons from TM_WORLD_BORDERS (Chapter 7, page 202 in book). Code: src_file = ...
2
votes
1answer
485 views

OWSLib vs shp2img output of MapServer Layer

I'm working on a map layout engine using Python and ReportLab and have come across a problem and was wondering if anyone can give me some insight. Scenario: I'm trying to generate an image using ...
24
votes
4answers
2k views

Recommend topics to be included in a Computer Science for Geospatial Technologies course

I will be instructing a course at the local university titled Computer Science for Geospatial Technologies. This is an introductory course meant to introduce computer science concepts to geospatial ...
4
votes
2answers
227 views

Spawning a process from ArcGIS ToolValidator

I attempted to spawn a separate process from the ArcGIS ToolValidator script. Unfortunately, it launches another instance of ArcCatalog. What is going on behind the scenes that causes ArcCatalog to ...
6
votes
4answers
5k views

Efficient arcpy method of points in polygon

Coming from a background of Mapinfo and Manifold, I frequently find myself frustrated with the ArcGIS SQL toolset. In both these former programs it is trivial to write a query asking, for instance, ...
3
votes
1answer
824 views

ArcGIS Select Analysis using Unique Values from Field

I am trying to create separate shapefile using Select analysis with ArcPy by doing an SQL query to create them based on a unique value from the field. I want to create a list of the unique values in ...

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