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

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195 views

gdalbuildvrt error, when using in Python

I am new to python/GDAL and am running into perhaps a trivial issue. This may stem from the fact that I don't really understand how to use GDAL properly in python, or something careless, but even ...
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1answer
172 views

[mapserver]: layer filtering with layerObj.setFilter()

I'm trying to filter a layer (using mapserver) backed by a Shapefile using layerObj.setFilter() but this doesn't seem to have any effect on the returned tile(s). Sample code: layerObj = ...
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1answer
158 views

Python - indentation error [closed]

I've started learning python for future use in QGIS and using Ubuntu, installed with Python 3. I'm doing the tutorials from the great book for newbies "A byte of python". I'm having troubles running ...
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1answer
56 views

How to run only the newly added portion of a python script? [closed]

I was wondering if there is a way to run only the newly added portion of a python script? Usually I add a few lines of codes in the end of my script but I have to run the whole script to reach them ...
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1answer
799 views

How to obtain an extent of a whole shapefile?

I have got two shapefiles. One of them is a point shapefile and the second one is a polygon shapefile. I need to find out which of them has a larger extent and then set the environment extent to ...
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43 views

How to expedite process of creating features

I am creating TIN out of each two cross sections and in the end I merge them all together and create a seamless TIN using python scripting. First I create all the TIN and save them somewhere in my ...
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2answers
2k views

How to get the maximum value from a multiple values output (list of numbers) using calculate value in ModelBuilder

I have an output from a sub model that iterates through feature classes, each with a row count. The row counts are passed to a collect values, which is a model parameter and is used outside the sub ...
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1answer
259 views

How to export multiple MXDs to PNG without using VBA?

Okay, so I can feel that I am so close to solving this issue with the help of Jason (below) but I have modified to use as a script. The GetParameterAsText returns the following error when trying to ...
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1answer
80 views

Looping on the Select_analysis tool

Im trying to perform a loop on the Select_Analysis tool in Arcgis. Code looks like this: inputfile = open("locality.txt", 'r') # locality.txt is a txt file of locality names loc_list = [] for line in ...
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2answers
435 views

Help writing script using a shapefile - select by attribute

I am trying to take an existing shapefile and narrow down the attributes using the 'select by attribute' The problem I am trying to solve is: Find parcels that have an acreage >= 100. The code I ...
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1answer
236 views

SetGeometry problems when using python/ogr

So i am trying to use the difference function and i pretty much create the new file i want but the Geometry is empty. No error is produced. any help would great! Thanks. #!/usr/bin/env python import ...
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161 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: ...
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2k views

Display a georeferenced DEM surface in 3D matplotlib

I want to use a DEM file to generate a simulated terrain surface using matplotlib. But I do not know how to georeference the raster coordinates to a given CRS. Nor do I know how to express the ...
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1answer
99 views

Creating plugin in QGIS to access PostgreSQL? [closed]

i want to develop a plugin in QGIS to access to my database in postgres : i want to import a file.sql that contains my SQL Code in a textbox , and execute this code to assign myd database.
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1answer
272 views

Using the API of QSpatiaLite plugin

I am using the popular QSpatiaLite plugin for QGIS. Since I am creating and modifying SpatiaLite tables directly with Python (using pyspatialite), I wonder whether I can automate tasks such as ...
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1answer
2k views

function, return, 'instancemethod' object has no attribute '__getitem__'

I'm still trying to write a python plugin to create an input file for an urban climate model out of three shape files. Now I stumbeled into another problem, that I think is an easy one, but I just ...
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1answer
327 views

Remove Illegal Characters in Model Builder [duplicate]

Possible Duplicate: Arcpy remove invalid character I've created a model that iterates through a shape file and pulls out unique values in a field. These unique values are then used to ...
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1answer
473 views

Looping Dataframe in Python doesn't Return Expected Results

I'm creating a python addin script to be used on some mxd's I have created as templates. Each map contains 2 dataframes. I need to loop through each dataframe and do some processing on each. I set my ...
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2answers
860 views

trouble with UpdateCursor where clause in arcgis 10.1

I'm trying to use UpdateCursor in arcpy, but the where clause I'm using seems to be causing trouble. However, when I open up the table in ArcMap and use Select By Attributes with the exact same clause ...
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1answer
227 views

ArcGIS Python Error Raster Domain

I´m always getting an Error with my Python-Code. Even though it is almost the same as on the ArcGIS Help Website. The Error occurs in line 19: Traceback (most recent call last): File ...
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1answer
636 views

Installing GCC correctly

I'm writing this as an utter Ubuntu newbie. I want to run the script found on Save points to a shapefile with GDAL. But I get the following error, yes this error is similar to the question posted ...
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1answer
617 views

arcpy Geometry tools give incorrect results

I'm new to python and arcpy but I've been trying to learn how to run geoprocessing tools using arcpy. I have (for this example) 2 shapefiles, a and b, which are both polygons. From plotting them in ...
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879 views

It is possible to edit selected features with Python?

I'm trying to edit some fields of the selected features in ArcMap. It's possible to do this with Python (ArcPy)?
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1answer
30 views

Select the first 5 rows of a selection after reverse sorting using an attribute field in ArcGIS 10.2 with Python

I have a feature class containing 380 polygons representing sedimentary basins and another polygon feature class representing oil discoveries within said basins. My plan is to: Iterate through all ...
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1answer
45 views

How to trigger a QGIS action when a plugin button is clicked?

I tried calling the select free hand tool by below snippet of code. iface.actionSelectFreehand().trigger() I dnt have any idea how to call this when i am pressing a button in GUI. my gui is ...
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2answers
78 views

How to add XY point and update attributes with ArcPy 10.0

I would like to create a script tool that takes 3 parameters in ArcMap: Google maps coordinate (e.g. -33.876846, 151.215117) text string text string The coordinates would define the XY geometry, ...
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16 views

Arcpy/python Syntax Error. Variable Creation

I'm having a problem when trying to create a new variable within python. i = datetime.datetime.now() tme = i.strftime('%d/%m/%Y') print tme This portion of the code creates a date variable (tme) in ...
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1answer
59 views

How to show the attribute table of selected features using arcpy?

Is there a way to show the attribute table of selected features using arcpy? Maybe in the mapping module? I would like to be able to select some features and then have an Add-In button that ...
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1answer
46 views

Help interpret GeoTif pixel value python gdal: connection between pixel value, RGB values and physical concentration?

I was running python script that queries a GeoTiff file at the coordinates of a centroid of blocks and as a result I got a list of pixel values, which I have trouble interpreting. When I run gdalinfo ...
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2answers
81 views

Find duplicates in a field then update another field with a Y or N with Python (ArcGIS)

I am attempting to create a python script (ArcGIS 10.1) that will identify duplicated records within a points shapefile with a Y or N (possibility of over 5000 records). Similar to this: xyCombine | ...
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1answer
62 views

ArcPy Error - 'continue' not properly in loop [closed]

Is there a way to get the continue function to work? Here is my code:
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1answer
37 views

Layer still in map after running arcpy.mapping.RemoveLayer?

I'm trying to run a script that removes a group layer from a set of map documents, the code runs and the correct zone to be deleted prints out, However, when I check my map documents, the layer is ...
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1answer
54 views

Can not SET a Value in table using Python?

I'am trying to set values in table, the code run good, i don't got errors, but nothing is done ! I'm using Arcgis10.1, arcpy and Python This is the code : import arcpy import math import arcview ...
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2answers
57 views

Optimizing script with in_memory selection

I had a problem solved here. I had 2 features: polygons and points, both containing similar attributes(example: street name, number). Each polygon must have equivalent point added(same street name, ...
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1answer
71 views

How to set feature coordinates to values in attribute table?

I have some shapefiles that were produced programatically, and everything came out okay EXCEPT that the geometry information was not written correctly. The coordinates for each feature are null. ...
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1answer
26 views

Data frame index

Can anyone know how to make index ,in arcpy, for a several data frame in one mxd? That question related to this question : Insert layer file to specific data frame
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1answer
89 views

Calculate Field based on two fields using python

I'm trying to calculate new values for a field based on two other fields. In VB I don't have any problem, but I need to use python to publish my gp service.
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1answer
24 views

Issue using Osmconvert with Python

I want to use osmconvert to parse down the size of my diff files for just the area I'm interested in because osmconvert is way faster than osm2pgsql, which loads the data. When I call the command ...
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1answer
40 views

Arranging elements horizontally in ArcGIS tool

Is it possible to arrange multiple check boxes horizontally in a tool and changing the parameters dynamically (adding/removing) based on user selection of check boxes?
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1answer
29 views

Is there a method to determine the sources that are used in a model in ArcGIS?

I have a model that I have had to go through to model parameters in order to create a geoprocessing service. Is there a way to check all sources that are being used in the model via python? I am ...
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2answers
510 views

GDAL for Python: extracting subdomains from NetCDF file?

I need to make a script that processes a NetCDF file that contains 3 days of hourly forecast data from the norwegian meteorological office. The NetCDF file contains various data I need ...
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1answer
69 views

Is it possible to import arcpy module to PyPy interpreter?

I'm trying to use PyPy for my code because of speed. But my code needs arcpy module to run and I cant find out how to install or import this module to arcpy. I'm using PyPy 2.3, Python 2.7 and Win 7. ...
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1answer
112 views

List index out of range error

I've been writing a script that clips large datasets based on a selected feature. It works fine when I run it in a test workspace where only related layers are active and running. However, when I run ...
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1answer
43 views

count attribute in raster

I'm trying to calculate the total number of counts a raster contains using python script. When I ran the script, I didn't get any error. However, I also didn't get the number of counts for each row in ...
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2answers
173 views

Python library or algorithm to generate arc geometry from three coordinate pairs?

I'm trying to write code to generate fixtures for a django/geodjango project. I need to generate geometry for arcs (line string) given three lat/long pairs; start of arc, end of arc and centre of arc. ...
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1answer
282 views

Getting error 'exceptions.NameError' in Python script?

I'm getting <type 'exceptions.NameError'>: name 'B' is not defined when I run this script. Why is my 'B' not defined and is it a syntax error? For clarification, I am trying to get the code to ...
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2answers
214 views

Any clue how to read a .style (ArcGIS) file in Python, for converting into another platform-specific format? [duplicate]

The problem I am face with is that I have all my data as shapefiles but my organization works with only 1 ArcGIS license. Migrating to QGIS to prominent amount of work, I need to convert my ArcGIS ...
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2answers
238 views

Is there a way to use gdal functions from OSGeo4W out of their shell?

I would like to use some gdal functions from OSGeo4W (gdal2xyz, and gdal_merge) for my work. I can use them in the OsGeo4W shell provided after installing the package. But I want to use them in ...
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2answers
109 views

How to show attribute table in the form

Is there any way to show the attribute table of a layer in a QtextBrowser or a QtableView on form? I did this but,(shows attribute table in a separate dialog) I have no idea, how to show it in my ...
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1answer
137 views

Updating records based on value in another field using arcpy.da.UpdateCursor?

I am trying to write file names and paths to two separate fields in a feature class, and the value for each record is dependent on finding a match in a list. When I run my code it writes the same ...