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

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22 views

Inline variable substitution in Model Builder using python code

I have an inline variable substiution which I would like to import into my Python script. Is that possible? I am trying to make a parameter within my path. My path currently is ...
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2answers
31 views

Performing batch Join Field in ModelBuilder?

I have a list of 250 feature classes (X1, X2 X3, ...) which all have an individual field that I want to join to another feature class Y. The join can be established through a common field that are ...
5
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2answers
737 views

Problem with the where clause in ArcGIS when dealing with variables

I am writing a python script for ArcGIS. I have an input feature class which contains multiple pipelines which is saved as a variable InputPipeline. I would like to iterate through the pipelines and ...
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1answer
11 views

How to select from selection with PyQGIS?

The expression box has a handy "select from selection" button. Is there a way to emulate this with python? I have the basic expressions down, but can't find a way to do this.
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1answer
13 views

QGIS python plugin appends values every time it's started

I've written a small python plugin (using plugin builder as base) to simplify the expression process for a given layer (just a few comboboxes that are used to create a query). The combo box populating ...
3
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1answer
43 views

More efficient way to get the start and the end points of a line (arcpy)?

I am collecting start and end points for a large polyline feature class in a file geodatabase. I am using arcpy, ArcGIS 10.3, Python 2.7.3 64-bit and a 10.3 compressed file geodatabase with just one ...
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0answers
15 views

Why processing.runalg(“gdalogr:rasterize”…) is not creating out files when running in the QGIS 2.6.0 console?

I want to the QGIS python scripting functions to turn to rasterize a point vector using many different dimensions. Right now my code looks like this: import processing RasterPixelSize = ...
2
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3answers
2k views

How can I fix “ImportError: No module named qgis.core”?

First of all, I'm using Python 2.7.3, QGIS 1.8 (Lisboa) on Windows 7 pro 64 bits. Now let's go to the actual question: I have written some code (Python) that works well within the QGIS built in ...
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2answers
98 views
+50

ArcPad Checkout from python command line

I have been developing a script to automate my ArcPad checkin/checkout processes. My problem is that I am having trouble getting arcpy to recognize the ArcPad tools from the command line. From the ...
2
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2answers
44 views

How to get cell value along Flow Direction

I have: a flow direction raster where I took off (assigned NoData value) the cells that overlayed the river network (from flow accumulation). a perfectly overlapping raster where I asigned a ...
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0answers
27 views

error while trying to compile quantum gis: unresolved external symbol class QwtIntervalData [on hold]

While trying to build qgis-2.6.1 from source on windows 7 32 bit with mvc++ 2008 I got the overall result ========== Rebuild All: 281 succeeded, 3 failed, 0 skipped ========== from this I am able to ...
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0answers
18 views

How to set NULL value by arcpy.da.InsertCursor on date column?

How to set NULL value by arcpy.da.InsertCursor? I try insert "NULL", None, '', 0 Is it possible by arcpy.da ?
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1answer
252 views

Orthographic reprojection with mapnik

I am trying to create a google earth like wep application. My problem is that I can't get to render a full view of the earth. The zoom_all() function generates the following error : RuntimeError: ...
0
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1answer
14 views

Shapely (geos) crashes during unary_union

When attempting to union multiple polygons with Shapely 1.5.6 in Python 2.7.9, using GEOS 3.4.2, I get the following error in the underlying C++ code: Assertion failed: (!"should never be reached"), ...
0
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1answer
22 views

Collect last word from varied length string for filtering, auto labeling and column population? [on hold]

I have been looking and reading for a few days about how to collect the last word from a varied length string. I have found lots of postings about how to collect/split the last word, but none of the ...
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0answers
29 views

If Else Statement Existence of a File With User Input [on hold]

I am trying to design a block of code that checks if a user inputted directory exists, prints if it does, and if it does not. import os foldername = raw_input ("Please enter the name of your ...
3
votes
1answer
340 views

Configuring spatialite database access for Python 2.6.6

I'm working on a GIS project, and I would like to implement and test some geo-spatial algorithms in Python. For this purpose, I will not only need sqlite, but also spatialite, in order to store and ...
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0answers
41 views

gdal ReadAsArray returning NoneType

I'm trying to read in several rasters as array using gdal in a python script, but I keep getting NoneType returned and can't figure out why. The process is this: 1. Use gdalbuildvrt ...
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1answer
42 views

How to get a layer by name in PyQGIS?

I have a plugin which finds buffer for list of cities, provided the distance. The state and city names are taken from the attribute table and gets filtered accordingly. What I want is My plugin should ...
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2answers
134 views

arcpy calculate string field: Any ideas what how to fix this?

I'm trying to store a string value obtained from a loop through a tuple into a field called ROW_1. The code goes like this: for creekclass in listOfClassTuples: (classname, Permanency, ...
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0answers
17 views

Suppress values from multiband rasters

I have a raster stack with 84 bands . It is a time series raster. It so appears that the cloud is causing error in my processing and hence i need to suppress or replace them by a NaN to eliminate them ...
0
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1answer
19 views

ImportError: libqgis_core.so.2.9.0: cannot open shared object file: No such file or directory

I installed qgis in debian linux and I want to run a standalone app in python. So I import qgis.core and qgis.gui in this app. But it gives me an error: ImportError: libqgis_core.so.2.9.0: cannot ...
2
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1answer
133 views

AttributeError with unicode object with data frame in python script

I'm running a python script from arccatalog and it works, however, I am trying to add layers to an mxd and need to declare the data frame. I keep getting this error message. type ...
5
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1answer
402 views

QGis Zonal Statistics Plugin NoData included in Calculations

I have been trying to use the QGIS zonal statistics plugin. My raster has a nodata value of -99999 and all other values are positive. After computing the mean zonal statistics there are a number of ...
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1answer
50 views

Grass 7 on Ubuntu 14.04. Can't start Grass

I attempted to install GRASS GIS 7 on ubuntu 14.04 using these instructions. When I call grass70 from the command line I get a welcome message and a prompt to continue. I then get two error messages: ...
19
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11answers
4k views

What are the Python tools/modules/add-ins crucial in GIS?

With ArcGIS 10, Python has become the de-facto scripting language for ESRI. While leading Open source software like QGIS, GeoServer, PostGIS all supports Python. Thus it became important to know/learn ...
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5answers
110 views

How to export attribute table with start and end coordinates of lines to Excel?

I am working in QGIS. I have a georeferenced line layer and I want to export the attribute table and the coordinates of start and end points of my lines to Excel. Can I do this with QGIS?
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1answer
217 views

Spatial ETL Tools won't run “AttributeError: 'module' object has no attribute, etc.”

I have a python script that runs 5 Spatial ETL tools that I wish to run as a scheduled task. Each of the tools will run successfully from ArcCatalog and also from the ArcCatalog Command line. If I ...
6
votes
4answers
457 views

Migrate in a new programming GIS language

The last five years I have been working with VBA and ArcObjects for developing a specific application within ArcGIS. That project that began around 2008-2009 carried out with VBA and ArcObjects which ...
1
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2answers
139 views

Adding layer into ArcMap via Python - .pyt versus .py

In the final step of a script I've built, I'm trying to add a layer into an empty blank map document. This is my block of python code below that adds the layer. Everything works fine if its run from ...
5
votes
2answers
578 views

Load and display a layer from SQL Server using PyQGIS

I'm having a go at using pyqgis from within the QGIS python console to load a layer from SQL Server and display it. I feel like I'm part way there but I'm having a real issue getting the layer to ...
0
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1answer
46 views

Is it possible to embed python in code for HTML pop-ups in ArcGIS

When clicking a point feature I want the html pop-up to not only contain the data of the feature but also an image of the area around the feature (eg. 2 km^2). The image would have the base map 'World ...
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2answers
146 views

Why is my cursor empty?

Yesterday I set up a Python script using a cursor on a layer. Today I've tried running again and no matter what I run it in, the cursor is empty. I've tried removing the query on the layer, tried ...
7
votes
2answers
2k views

How to get raster corner coordinates using Python GDAL bindings?

Is there a way to get the corner coordinates (in degrees lat/long) from a raster file using gdal's Python bindings? A few searches online have convinced me that there is not, so I have developed a ...
2
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1answer
22 views

Python FindLabel Function for Label Expression with Formatting Font?

I originally had this FindLabel function (which works)... def FindLabel ( [NAME], [Count_] ): if [Count_] != None: return [NAME] +'\n' + "Well Log Count: " + [Count_] I wanted to format the ...
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1answer
28 views

Cannot rename output file using standalone script for QGIS

I would like to rename all output files after my script has finished processing them by adding "(A)" after their file name (eg. Layer.shp -> Layer (A).shp). I received an answer from this post on the ...
0
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0answers
51 views

Problem exporting ecw project- arcpy

I work with arcview 10.3. Every time i export maps with ecw raster format , python (version 2.7.8) get crashed and i see: I use this code: import arcpy,os,sys,string import arcpy.mapping from arcpy ...
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1answer
34 views

How to add label to QgsVectorLayer by Python

my goal is to define label programmaticly for the case similar for the figure below: But didn't find any guidance how to do so using Python. I have a feeling it could be done using QgsLabel but ...
4
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2answers
1k views

Setting the extent for a QGIS map using python

I am writing a stand-alone application in Python/QGIS that simply creates maps. I want to load vector/raster layers, set symbology, set extent At the moment, that is all! Currently I am just using ...
7
votes
1answer
222 views

Why is matplotlib installed with ArcGIS?

Today I upgraded to ArcGIS Desktop 10.2.2 as well as the 64-bit background processing tool and noticed that both numpy and matplotlib were installed with Python. In fact, in the "What's New?" section ...
6
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1answer
772 views

How to automatically generate useful scales for data driven pages in ArcGIS desktop

I have been tasked with creating several hundred maps of properties that intersect a long pipeline. The maps will zoom to the part of the property which shows the intersection. The lengths of ...
5
votes
2answers
1k views

Describing a coordinate system in arcpy

I have a python script in ArcGIS 10.1 which takes in a few inputs from the user. One of the inputs is a coordinate system. I would like to test whether the coordinate system the user chose was ...
15
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5answers
2k views

How to make a GIS inventory?

My office will be seeing a big change in its GIS section. This section has been operational since the 1980's and has a huge collection of GIS data (i.e., shapefiles, raster files, data, etc) but never ...
1
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1answer
45 views

Download file from network using PyQGIS 2.x

I have a python plugin targeting QGIS 1.8 that uses QgsNetworkAccessManager and QNetworkRequest to issue a GetCapabilities request to WMS servers. With 1.8 everything was working fine. Now we are ...
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2answers
470 views

How to List Tables from current map document (mxd)?

We have many maps containing Feature Classes and Tables in a Personal Geodatabase that need their information updated. Is there a function to List Tables from the current map document like mxd = ...
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2answers
71 views

Adding descriptions to feature class in a geodatabase using arcpy

I am trying to populate the properties of a feature class in a geodatabase using arcpy. In the past I have been given geodatabases with features classes that already have their property descriptions ...
3
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1answer
186 views

Using Python Add-In to delete/remove ArcMap layers that are turned off?

I have made a python addin button which removes layers that are turned off in an MXD. The strange thing is that I get different results depending on whether I run the python commands in the python ...
0
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1answer
382 views

Raster Calculator Workaround in Arcpy for Suitabiliy Analysis

This is my first attempt at a complex stand alone python code. I am self teaching the arcpy module, well at least attempting to. I am having a great deal of difficulty getting my site suitability ...
5
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3answers
1k views

calculating a field in which null values may be present

I would like to calculate a field (short integer) using other fields (short integer) present in the table. In some cases these fields may have null values for one or more of the fields. For example, ...
1
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1answer
179 views

How to use InsertCursor to add points to a point feature class?

I am struggling with a very simple task of inserting "SHAPE@XY" into a point feature class. Following is what I have: xy = [(361087.15436001675, 198747.07296730898), (361530.56426259346, ...