Questions tagged [python]

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

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votes
1answer
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Help with PostGIS polygon geometry - non-closed rings

I've picked up a copy of the super-wicked book 'Python Geospatial Development' by Erik Westra (Amazon link), and I'm working through it. Currently, it's teaching me to load GSHHS coastline data from a ...
2
votes
1answer
161 views

Using ESRI Python's Geoprocessor Via mod_python

I am working on a number of geoprocessing services to be accessed solely by web clients. The traditional method of encapsulating this type of stuff in toolboxes and then publishing the toolbox just ...
4
votes
4answers
2k views

When a raster is clipped to a polygon with Python, why does it still take on the extent of the entire shapefile?

I am clipping a raster image to each polygon row in a shapefile in ArcMap 9.3 using the Clip tool (Data Management) in Python with Clipping Geometry set. While the clipped raster successfully depicts ...
3
votes
4answers
3k views

How to clip raster image by the extent of each row in a shapefile with ArcGIS 9.3

I'm using Python to clip a raster image by each row in a shapefile with ArcGIS 9.3. I am hoping to end up with one raster image for each polygon row, clipped to the extent of the polygon row. However,...
1
vote
1answer
1k views

Convert old ArcGIS 9 VBA tool to new Python script tool for ArcGIS 10

I have an ArcGIS .mxd file with an imbedded VBA script that is executed from a tool bar button. I would like to convert this VBA script tool to a python script tool for use in ArcGIS 10. Is that ...
4
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3answers
2k views

Converting ESRI Web Client JSON to Standard Feature Class With Python Geoprocessor

Is there a function exposed by ESRI's python geoprocessor that converts the JSON format used in the various web clients to a valid feature class. Clearly, the function exists because something is ...
5
votes
1answer
792 views

Determining ESRI File Geodatabase release version?

Is there any method in Python, ArcObjects, or the File GDB API for determining the release version (9.3, 10.0, etc.) of a file geodatabase? There is a need to find all of our shared 10.0 version file ...
0
votes
1answer
406 views

How to use the transformer KMLRegionSetter ? (Python/FME)

I use Python and FME. I would like to use a transformer "KMLRegionSetter_2" for KML file. I use a fmi file for the transformation. reader=FMEReader("OGCKML",{'USER_PIPELINE':"C:\\arcfactory.fmi"}) ...
3
votes
3answers
5k views

Read KML file with GDAL/OGR for Python

I have file : test.kml and I try to open it with GDAL/OGR (1.6) librairie in Python (2.5). But I don't succed can you help me ? This is my code : from osgeo import ogr adresse = 'test.kml' driver ...
1
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0answers
325 views

Validate Python Fme

i have a problem with my script for convert GDB to Excel. if s=='xls': reader=FMEReader("GEODATABASE_FILE") reader.open(param_filename_gdb) writerXls= FMEWriter("XLS_ADO") ...
1
vote
2answers
1k views

Creating and serving pdf files from ArcGIS server 10.0

I am tasked with sending map data from the Flex client to an MXD then to serve that as a PDF to the client and/or a server side location. Creating the PDF isn't an issue, however, I am having trouble ...
1
vote
2answers
464 views

FME API Module null?

I try to convert my geodatabase to Excel. And i have a strange message: FME API version of module 'XLS_ADO' matches current internal version (3.6 20101014) Trying to find a DYNAMIC plugin for ...
0
votes
0answers
396 views

Reading empty feature table with FME / Python?

I would like to convert a feature table Geodatabase (empty) to MapInfo, but my feature table is empty. I would like to write the schema of feature table in MapInfo file. Is it possible to force the ...
0
votes
2answers
593 views

Read feature table with FME / Python

I try to convert a feature table Geodatabase to MapInfo with FME / Python But each test, my application crash. There is no geometry in my feature table in file geodatabase. Why my application crashes ...
4
votes
1answer
4k views

Find and Replace expression needed in Field Calculator ArcGIS 10

Looking for the Field Calculator code (Python preferred) to replace the last numeral values in a field using another field's values for entire attribute table. Please see screen shot here:
1
vote
1answer
463 views

FME Feature Type with Python

Here, the Python for create a list of feature types but.... import sys from pyfme import * try: log=FMELogfile("shapeToTAB.log") log.log("Opening reader",FME_INFORM) reader=FMEReader("...
2
votes
2answers
2k views

Automate creating Rectified files from georeferenced images

A python 2.6.5 / ArcGIS 10 solution is preferred. UPDATE: I found a tool to do this "Create Ortho Corrected Raster Dataset" but the python script for it gives errors when I try. import arcpy import ...
3
votes
2answers
1k views

How to get a list of features from FME? Python?

I would like to get a list of geodatabase feature tables from FME. Is it possible with Python? Or another transformer?
2
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2answers
1k views

Mapnik TextSymbolizer showing nothing above OpenStreetMap base layer

I'm trying to use Python to create a TextSymbolizer to display a trail name above the trail LineSymbolizer. Below this layer is the OSM base layer which contains its own data for that trail. I can ...
5
votes
4answers
3k views

Changing image projection using Python

Image corner coordinates are known: Top left: (70.20315, 20.92749) Top right: (70.20315, 31.45240) Bottom left: (59.70571, 20.92749) Bottom right: (59.70571, 31.45240) (Basically map over Finland ...
2
votes
2answers
955 views

How to get a composition name in Qgis python console?

In Qgis python console: I want to populate a list with compositions names, like in Composer Manager, but I can't figure out how to get the names (titles). So far: composerlist = self.iface....
10
votes
3answers
20k views

Converting X,Y coordinates to lat/long using pyproj and Proj.4 returns the wrong coordinates

I'm writing a python script that reads multiple XML files containing x and y coordinates and combines them all into a single csv file. Latitude and Longitude are required fields in the csv, but I am ...
2
votes
3answers
748 views

Definition Query to Python script on Oracle 9i and ArcGIS 9.3.1

SUBTYPECD=1 AND SERIESNAME NOT LIKE '%-%' AND OPERATIONALSTATUS IS NULL OR SUBTYPECD=1 AND SERIESNAME NOT LIKE '%-%' AND OPERATIONALSTATUS = 976 The above is my def query in ArcMap against ArcSDE 9.3....
4
votes
1answer
3k views

How to import qgis.core in a Osgeo4W installation?

when I try to import qgis core module from python: from qgis.core import * I get this error: ImportError: DLL load failed: The operating system cannot run %1. Searching the web I found that I need ...
2
votes
2answers
3k views

GDAL tools for QGIS on OSX - what is the exact directory for gdal binaries?

When I try to use the gdal raster tools, eg clipper, I get the message "The process failed to start. Either the invoked program is missing, or you may have insufficient permissions to invoke the ...
29
votes
2answers
6k views

Using OGR and Shapely more efficiently? [closed]

I'm looking for some suggestions about how to make my python code more efficient. Normally efficiency doesn't matter for me but I am now working with a text file of US locations with over 1.5 million ...
2
votes
2answers
25k views

Using os.sep in Python?

What is os.sep and when should i use os.sep while scripting for arcgis ? For example in below code i don't understand why should i use os.sep . import arcpy from arcpy import env import os # Set ...
2
votes
4answers
2k views

Does ArcGIS 10 have a Geoprocessor Programming Model by using Arcpy?

Does ArcGIS 10 have a Geoprocessor Programming Model by using Arcpy? is it possible to use ArcGIS 9.3 Geoprocessor Programming Model within ArcGIS 10?
12
votes
5answers
609 views

Smallest GIS library for embedded devices?

I need to use very simple geometry operations (read SHP or other standard format and simple searches) within an embedded device running a simple linux based os. What is the smallest and simplest API ...
4
votes
3answers
8k views

How do I export attributes with Python scripting in ArcGIS 10?

How do I export an attribute table to dbf or txt format by use of Python in ArcGIS 10?
4
votes
1answer
2k views

Area units for GEOS area property?

I'm working with GeoDjango and have a polygon in the WGS84 projection. I need to find its area in square meters. When I call polygon.area, I get some float out and I have no idea what the units of ...
18
votes
8answers
82k views

Installing GDAL and OGR for Python?

I am developing some code in Python, and I want to use the GDAL/OGR python bindings. What is the minimum I need to install in order to use the GDAL and OGR python bindings? What is the easiest way to ...
2
votes
3answers
2k views

Batch convert ArcGIS 9x files to 10

I would like to convert all mxd's in a directory and it's subdirectories to ArcGIS 10 mxd's. This is so that I can then run python to automate some updates within them. Is this possible? This is my ...
3
votes
2answers
2k views

Creating Esri Grid and populating cell values using Python/GDAL or ArcObjects?

In terms of processing speed what's the fastest way of creating and then adding values to a raster? The values will originally come from ASCII files which can be about 500MB in size - ideally I ...
11
votes
2answers
261 views

How could I rate roads for scenic drives?

relative GIS newbie here. I've been working on a personal project to rate roads on how nice a ride they'd be on a motorcycle. I wrote a Python program to work through road data in the TIGER dataset (...
0
votes
6answers
7k views

Batch buffer with Python in ArcGIS 10

I have some feature classes (7 feature classes) and I want to batch buffer in ArcGIS 10. I don't know how can I buffer at once. Please help me.
3
votes
1answer
468 views

ArcGIS GeoProcessing Model - Store List of Altered Features in Database

I am trying to build a GeoProcessing model which will find any parcels that have had their geometry values changed and store the corresponding parcel numbers in a separate non-spatial table. I am ...
3
votes
2answers
190 views

How to bring polygons closer to a point?

I have some scattered polygons with a lot of space between them. I want to make a thematic map but all that white space doesn't look very good, so I want to bring the polygons closer to the center of ...
1
vote
1answer
761 views

Win7 GRASS 7 & i.landsat.toar

Hello has anyone got experience running i.landsat.toar ? The output files I get are empty, the command takes but a moment to complete. However when run in verbose mode all the calculations are done, ...
9
votes
6answers
2k views

How do I generate thumbnails images from lots of shapefiles?

A colleague and I recently released an Open Source project called Mapoteca which is a set of Python Scripts that integrates with a GDAL/FWTools installation allowing a full walk-through of directories ...
1
vote
0answers
340 views

getting the correct location data with user input

I have some code others have provided, which I modified in order to run a Python script in a toolbox in ArcMap which accepts user input for a starting point, distance, and angle to create a shapefile ...
11
votes
1answer
3k views

Exit script with Python

I've got a Python script for ArcGIS that I'm working on, and I'd like to have the ability to have the script quit if it doesn't have the necessary data available. I tried a straight up sys.exit() but ...
9
votes
4answers
580 views

ArcView 3.x Avenue Bitmaps (Tabs?) vs. ArcView 10 Python Cursors

Note: While this question has an answer, any further tips for optimizing a cursor process would be greatly appreciated. I will be monitoring for any updates. Currently, my boss (who works in Avenue) ...
3
votes
3answers
3k views

Using Mapscript to create a mapfile from scratch

Following a few online tutorials I have seen, I am trying to create a mapfile from scratch using mapscript. However, when I try to create the layer object, I get an error in the init of mapscript.py; ...
9
votes
4answers
4k views

ArcGIS Python Tool - Importing Custom Script Into ToolValidator Class

I had posted a question last week about customizing a ToolValidator class and got some very good answers. In working with the proposed solutions, I have created a custom module that performs queries ...
3
votes
1answer
912 views

Can ArcGIS Desktop 10 Add-in Use IronPython?

Coming from the same background as the original poster in this thread, I wonder if anyone has had any success creating an Arc10 Add-In using IronPython. I have been able to access ArcObjects via ...
12
votes
5answers
7k views

Compiling Python scripts (to .exe) that use ArcGIS Geoprocessing Tools?

I've been coding with Python for several months now and have developed some reasonably complex scripts for primarily geoprocessing tasks. That being said, I'm still learning a lot as I'm coming from a ...
4
votes
4answers
757 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
187 views

Accessing smb share on Trimble YUMA with python

I need to write a script that would import a .shp on the YUMA to a gdb on the script/host pc for manipulation with arcpy. I can't seem to find a smb python module. So Im not entirely sure on how to do ...
3
votes
1answer
2k views

Cropping an image with a map extent

I have an raster file in my server space, which has the same projection as my webmap, and I would like to crop the image by passing the visible extent of a webmap. I think the cropping function is ...