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

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2answers
254 views

How to modify the results of a geological dataset from vertical to horizontal?

I have a 3-D point shapefile of a geological fault dataset consisting of x,y, and z columns. I need to create a raster dataset from this point dataset. I have been trying to do this in ArcGIS; however,...
4
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1answer
486 views

Is There a Way to Emulate the Identity Tool in ArcGIS?

I work at several different companies each with different license levels of ArcGIS. I got used to using the Identity tool at a company which had access to the ArcGIS Desktop Advanced license. ...
0
votes
1answer
1k views

Invalid topology error when running script

I am trying to run a python script and I get an invalid topology rule when I get to the feature to line tool. I am using arc 10.1 but I think the script was written in 10.0. I know it was built in ...
0
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1answer
334 views

connect signal to function with arguments

Hello I have this function on python that take 2 arguments: def niveau(controName,idNiveau): ........ I want to connect it to this signal: QObject.connect(dialog.findChild(...
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6answers
1k views

How to programmatically check if the number of shapes = number of table records?

I have a handful of approximately 1000 shapefiles that are corrupted (see attached error message). The shapefiles were generated from eCognition Developer 8. There is a script tool that seems to ...
2
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0answers
40 views

How to include checkbox or radio button in python script for arcgis tool? [duplicate]

I created an arcgis custom tool for converting an excel file to both kml and shapefile . Now I want to include radio button or checkbox to select according user interest for either kml or shapefile.
2
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1answer
130 views

Is there a quicker way of checking if a feature exists with OGR

I'm writing lot's of features to a FileGDB using OGR. The slow point in my script is checking that the feature isn't already in the Feature Class, based on the ID. Currently I'm using a function and:...
2
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3answers
7k views

How to get index number of list item using Python?

this gives me a list of all 55 layers in my mxd import arcpy mxd = arcpy.mapping.MapDocument("CURRENT") df = arcpy.mapping.ListDataFrames(mxd, "Layer")[0] for lyr in arcpy.mapping.ListLayers(mxd, "...
5
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3answers
270 views

Do Label Expressions Slow Down Drawing Speed?

Further to my earlier question about using different fonts on the same PC, I am wondering if label expressions would slow down drawing speed for a MXD? Here is my label expression: def FindLabel ( [...
1
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1answer
187 views

Python: Grabbing X,Y coordinate from matching fields

Here is my table. What I am trying to do is write a python script to go over the Zip_Crid values. If there are matching values, I need to grab x1, y1, x2, y2 and put it in a new field. Haven't really ...
2
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1answer
468 views

Programmitcally Change Text Font for all Labels on MXD

I'd like to know if there is a way to change the text font for all layers and all label classes within a layer on a MXD. I use a font not often found on all computers for created maps. I love the ...
2
votes
3answers
278 views

Software needed to recreate VBA forms using python for Arc 10.0

I'm new to programming and need to convert VBA scripted tools for the 10.1 upgrade. I need to recreate the forms and use Python scripting. How do I do this? I need the form to function in 10 ...
1
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0answers
185 views

QGIS GPS bluetooth connection

I have setup a Haicom bluetooth gps on a machine running Windows8 and have used GPSGate to create some virtual COM ports. I have valid data arriving at the COM port, but then I run QGIS and try to ...
2
votes
1answer
928 views

Distance of points in polygon to nearest polygon edge

I have a polygon shapefile with about a dozen polygons (Area.shp). I have an equation that calculates a value for points (or small areas) as a function of distance to the edge of these polygons. I ...
-1
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1answer
542 views

Raster produced by Con expression not saving

I cannot get a Con expression to work. Or, if it is working, I cannot get the raster produced by the Con expression to save. I have two rasters and I want the positive difference between the two, and ...
2
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1answer
198 views

Stumped on python looping and data dictionaries

I have been stumped getting my python code to work for a while now. I've been using python for the last several years on and off for simple things, but I am far from an expert in python. I am trying ...
7
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1answer
505 views

Geometry Projection Speed Test

Lately I've been using the OGR projection classes that come with ogr/gdal, but pyproj was recommended to me, so I thought I'd give it a try. To help me decide if I should make the switch, I did a ...
8
votes
1answer
9k views

How to convert shapefile to SVG keeping internal data?

I am very new to GIS. I found a tutorial on how to make a choropleth using Python tools. I want to follow it but use my own data and map. However the tutorial uses a US map SVG file and I need to use ...
4
votes
1answer
2k 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 ...
1
vote
1answer
463 views

Batch Aggregate Raster using Python

Trying to write a python script to batch Aggregate a bunch of different rasters. get a Parsing Error Syntax error for line 11. # Batch Aggregate raster tool import arcpy from arcpy import env from ...
0
votes
1answer
147 views

Custom forms and location of python code

I'm working with custom forms for the attribute table of various qgis-object and it works realy well, but I would like to have my forms and their python files separated from the projects. This is not ...
4
votes
2answers
2k views

Execute SQL in File Geodatabase

Is there a way to execute SQL queries on file geodatabase from Python? I'm looking for the same functionality provided by arcpy.ArcSDESQLExecute for SDE databases. Thanks,
2
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1answer
418 views

Using update cursor on a field with a domain

I have been replacing field calculations with python update cursors in many of my work flows and today I ran into a problem. The fields being updated have an attribute domain. so now, when I "...
2
votes
1answer
342 views

Can I append to different tables using ogr2ogr?

I have been through many related questions and links but I am still confused as to how/if this is achievable. So, I have defined tables in my postgis database and I would like my ogr2ogr commnand to ...
2
votes
2answers
303 views

Determine ArcCatalog's currrently selected folder using Python

Is there a way to get the current directory opened in ArcCatalog 10.0 using Python? Something like os.getcwd() but instead gives the selected folder on the catalog tree. Cheers
1
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1answer
230 views

How do I change the isNullable property for a field?

Once in awhile I encounter a field in my featureclasses that have their isNullable property set to No. Is there a simple way using python to correct this? I came up with this code, but ...
3
votes
2answers
2k views

Python GDAL/OGR: retrieved feature is NoneType

I'm doing some scripts in Python to deal with shapefiles, and I have an issue I don't understand. I'm looping over a shapefile, and I want to retrieve the geometry of each feature, but very often I ...
6
votes
1answer
2k views

How to zoom to a selected feature with pyQGIS

I want to create a function that selects a feature and zooms to it (similar in QGIS). Therefore there is following function: QgsMapLayerRegistry.instance().addMapLayer(self.vlayer) def zoomTo(self): ...
0
votes
1answer
1k views

How to read attributes in pyQGIS and QGIS 1.8 without setSelectedFeature

I add a vector layer to a map with QgsMapLayerRegistry.instance().addMapLayer(self.vlayer) later the attributes are read with def select_all(layer): layer.select([]) layer.setSelectedFeatures([...
1
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0answers
49 views

Problem in analyzing data in a stream segment

I have to find out the head difference along the stream segment. For that I used Spatial Analyst Tool>Extraction>Sample. With that I got the elevation values in points. But after doing so, i found ...
3
votes
1answer
222 views

Showing map in Grass Layer Manager/Map Display via Python

I've created some raster(tif) maps using Grass libraries in Python. I want to opem them automatically in Grass GIS Map Display or Layer Manager after creation. I don't want to use GUI for this. What ...
0
votes
1answer
599 views

Opening/closing an MXD that uses “production mapping” for dynamic tables in Python

I am currently working on a project that requires using a python/arcpy tool to allow a user to create a map series report PDF. Without getting into much detail, the tool is used when in ArcCatalog or ...
5
votes
1answer
1k views

How to load raster data with hyperlink path in ArcGIS MXD?

I have a problem/question and hopefully someone of you is able to help me: I have thousands of georeferenced raster files which have corresponding polygons (outer borders of rasters) with a hyperlink ...
2
votes
3answers
1k 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 ...
1
vote
1answer
1k views

Attribute error:'NoneType' object has no attribute

I tried to run a python script for getting the coordinate system of a feature/shapefile as follow >>> import arcpy >>> from arcpy import env >>> env.workspace="D:\...
7
votes
1answer
222 views

Is Python essential for working in QGIS?

I am a beginner in QGIS. I Generally have a doubt: to work in QGIS is it necessary to know Python? whether i am asking we should know to write python programs to make certain modules run?
5
votes
4answers
900 views

How to computational efficiently check if there are any overlapping polygons in a group of polygons?

I need to do some processing with groups of polygons. If any of the polygons in the group overlaps other polygon the result is unpredictable and don't throw any error. So, I need to detect if there is ...
1
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0answers
60 views

Ubuntu Raring - Openlayers Plugin 1.8 or 1.9 Master

Relative newbie to Ubuntu and QGIS. Many questions are posted relating to the Openlayers plugin. It works fine in windows but I cannot get it to work or even appear in either 1.8 or 1.9. The "fetch ...
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votes
2answers
2k views

Error handling with python script in ArcGIS 10

I have a python script that I am using to create a list of all mxd files (with full pathing) in our Projects folder. The script then uses that to iterate through the list and do a ...
0
votes
1answer
43 views

Points Solar Radiation reformat problem

I am trying to produce a set of monthly solar radiation maps based on a monthly parameterization of the diffuse proportion and transmissivity (i.e. new values for both parameters each month). The ...
4
votes
1answer
300 views

changing symbology

I have problem with my script. Layers are in one geodatabase, and have names like: orne1942, orne 2003, orne 2009 (the same forpart e.g. orne). Script should changing symbology layers wich have the ...
4
votes
2answers
592 views

Draw two separate lines from A to B and B to A

I have an Origin-Destination table like this Origin Destination Value A B 10 B A 100 A C 120 ... For all the locations A, B, C... I have another table indicating their location (Lat and Lon) Is ...
5
votes
3answers
1k views

Checking if python script is run from ArcGIS (arcmap or on server) or a stand alone python script

For debugging purposes I have created a hardcoded conditional that checks it the script is run as stand alone or as an ArcGIS tool. Is there anyway to fugure this out at run time? e.g. some ...
0
votes
0answers
109 views

How to export png to file system with python?

I use python to make a plugin that contains shape file,color_bar,time_bar 3 items above now I want to export my result to a png image After I find the method to do it I find a similar way to ...
5
votes
2answers
2k views

Python script to read coordinate system of an input feature class? [duplicate]

How to read the coordinate system of an input feature class in python script. How we can use "Describe()" function and tool validator for that purpose
1
vote
1answer
189 views

How to set parameters for Describe() function?

I developed one tool in arcgis using python code, in the process i used Describe(feature class) function to know the coordinate system of input feature class. I got success while compiling code, But ...
3
votes
1answer
557 views

Programmatically manipulate GPX data

I need to do the following in Python open OSM & GPX files (I have packages for this) transform points from GPX (like stick a track to roads) calculate the results (distances, cumulative ...
7
votes
2answers
768 views

How can I speed up my arcpy script?

I have written an application that does a lot of geoprocessing using arcpy. Once started, the application itself runs at an acceptable speed, but it is very slow to boot. It can take 30 seconds or so ...
3
votes
1answer
3k views

How to install shapely on Ubuntu 12.10

I have tried to install shapely on Ubuntu 12.10. Therefore I installed libgeos-c1, pip and shapely with $ pip install Shapely. The shapely files are now in /home/user/build/Shapely. When I try to ...
3
votes
1answer
390 views

AGS 10.1 geoprocessing service returning the wrong URL

I have an image export geoprocessing service that runs on ArcGIS server 10.1. It works by writing an image out to the scratch folder, and returning the location of that image. Basically just this: ...