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

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2
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1answer
43 views

use gdal python bindings from the QGIS folder in a custom script

I have QGIS installed (on Windows) and can import this line from the QGIS Python console: from osgeo import gdal When I try the import in a python file it doesn't work Traceback (most recent call ...
1
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1answer
52 views

Python - Projecting different shapefiles in the same folder

I have a few shapefiles in one folder with different coordinate systems but would like to use one of them as a template dataset. Is there a way to use python to filter out the shapefiles already in ...
0
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2answers
65 views

QGIS from console: raster algebra

I'm newbie to programming in pyqgis. I need to perform a simple "GeoTiff * A" type of calculation(where A is a constant), but I am struggling to do so. I tried ...
1
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1answer
39 views

Calculate date field using date variable and time attribute in a feature class

I have a string variable (fileDateString) with the date in this format: 20150404 In my feature class there is a text field with time in twenty-four hour UTC format. There is also 2 leading spaces ...
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0answers
33 views

ST_MakePoint returns an error when using Python

I am trying to use ST_Point or ST_MakePoint to create points from a table of latitude and longitudes coordinates. However I am consistently getting an error even when trying the examples. For example ...
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0answers
35 views

Search Address (Geocoding), Analyze intersecting underlying layer and return text results

What would the process be for going about accomplishing something like this via a website. Say I just wanted a website form where the user would input their address. Then beneath the scenes it would ...
0
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0answers
42 views

Making QGIS custom form modal?

I have created a custom form for entering attribute values for newly added features / editing attribute values for existing features of a shape file. I chose the ui file as "Edit UI" and a python file ...
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0answers
27 views

Closing QGIS custom form programmatically?

I have a custom form for entering and editing attribute values of a point shape file. I also added a button for deleting the actual feature. Deletion of the feature works fine and then I want to close ...
1
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1answer
48 views

How can I get features that satisfy a QgsExpression using PyQGIS?

I have two fields say "State" and "name" which would be get from the two comboboxes. After which, based on the current text in the combo box, I want to make QgsExpression and feature that satisfies ...
0
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1answer
43 views

How to access shapefile m-values with pyqgis?

Does anyone know how to access (read/write) m-values of a line-shapefile using pyqgis? I know how to do it with arcpy cursors ...
0
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0answers
30 views

How to raise exception from if statement in Python

This is a general python question, I would like to write a function that essentially states if data is available do this, if not raise an error, and a finally block which does something else. In ...
0
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0answers
28 views

Is PyQt4 'drag and drop' functionality available in Qgis Plugins?

In Qgis 2.8, is it possible to use the PyQt4 drag and drop classes (dragEnterEvent, dropEvent) to interact with items from a qtreeview, in a Python Plugin? Is it possible to hook into the ...
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0answers
16 views

How can I create text using Python in ArcMap 10.1

I am using data driven pages to create a map book and I want to create the neighboring labels. Is there a way to create the label with a background? And when there is a NULL value in the attribute ...
1
vote
1answer
66 views

QGIS custom Form - How to bind a value from a QComboBox?

I am trying to build a custom form for field data collection (bird species) with some python logic. The python code inserts values into a QComboBox: At the beginning of the list it adds the twenty ...
1
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0answers
22 views

Where does GEOS Library gets installed QGis

Working on OS X 10.10, QGis 2.8 I want to install basemap. I installed QGis 2.8 which includes the GEOS and the PROJ4 library. In order to install basemap properly, I need to pinpoint it to the ...
0
votes
2answers
74 views

How to change different projections of feature classes in geodatabase to one projection in new geodatabase?

I want to create a script that iterates through feature classes with different projections in a geodatabase and exports them into a new geodatabase, all with the same projections. What I want is to ...
1
vote
1answer
31 views

Using 3rd party libraries on QGIS (Windows)

How can I use 3rd party libraries on QGIS plugins on Windows? I've developed a plugin that uses rasterio and numpy for a customer, but he's having problems installing rasterio and numpy. Actually ...
4
votes
2answers
120 views

arcpy.da.SearchCursor ignores the where_clause parameter?

I'm trying to use arcpy.da.SearchCursor to go through records in a feature class stored in a SQL SDE database. I do so through a feature layer (created in arcpy) called "unit_lyr". When I run the ...
0
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0answers
32 views

Optimizing shapefile lookup time?

So, I have a ~1GB shapefile which is running circles around a ~5MB shapefile when it comes to feature look-up time (using python, with GDAL): def check(name, lat, lon, attributeFilter:'SQL ...
2
votes
1answer
90 views

Select by location in Python

I have a polygon layer and a point layer (with coordinates for each point). The polygon layer got created using the MMQGIS PlugIn (Hexagonal Polygons). I want to select all the points inside each ...
0
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0answers
24 views

Help how to return values from multiple columns to dictionary [migrated]

can anyone help with how to call additional columns to my dict below please? The example works fine for the return of one set of values (column) but I need to return values for 2 columns that are not ...
0
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0answers
67 views

Interpolation using GDAL

I am looking for some hints here. There is a shape file with point data of rainfall sampled at a regular grid, and there is a shape file with point data of soil attributes sampled at a regular grip ...
1
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4answers
76 views

How to remove period, comma, symbols using field calculator?

I want to delete . , # in attribute table using field calculator (VB Script or Python). How can I remove these using this example address: N. First St., Unit #1 (I don't need city or state name) I ...
0
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1answer
42 views

Iterate through all fields in attribute table and multiply by field

I have a table with a whole bunch of census variables (race, age, education, etc). I want to multiply all of these fields by a factor that I calculated. For example: Field1 has values of 10,20,30,40 ...
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0answers
48 views

QGIS 2.6 - installing exifread for photo2shape plugin

I've already seen Error loading plugin photo2shape even after installing exifread module and Error installing Photo2Shape QGIS 2.6 for Mac, and other forums, but can´t make it work. First I installed ...
1
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2answers
119 views

How to populate attribute table with sequential numbers?

Using Python, how can we populate a field in a feature class automatically in increasing order? The user must be able to provide the start number. For example, say he wants to populate values from 51 ...
3
votes
2answers
82 views

Using folder wildcards to copy files with Python

I would like to copy the data of one specific shapefile from a specific folder ("Grid") to a number of folders containing the name "Country". The country shapefiles would keep their original name. ...
1
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1answer
35 views

pyProj Coordinate Transformation Incorrect

I'm using pyProj to transform extents between two different geographical systems. In a case when both my systems are the same I expect to get back the same extents as inputted but this isn't happening ...
0
votes
1answer
75 views

Problem with addιtion abstraction in Field Calculator

I want a bit analytical respond for the mistakes I have done in my code cause I am new to programming. I am using ArcGis 10.2. and I must process a field with distances in an attribute table I have. ...
0
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2answers
37 views

How to use SQL within python in ArcGIS Labels

I'm trying to create labels across a one-to many relationship and have tried a simplified version of this method. My version looks like this: def FindLabel ( [NAME_V2] ): import arcpy ...
1
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1answer
30 views

Rename output shapefiles in PyQGIS

I have a shapefile which resides in a folder, gets processed and the output is saved in another folder. Before the output, I would like to rename the shapefile slightly differently from the original: ...
0
votes
1answer
53 views

Using pandas in Python window of ArcGIS for Desktop?

How can I import pandas module in ArcGIS at figure. I want to calculate poisson and negative binomial, so I think I need import pandas or other modules. import pandas as pd Runtime error ...
0
votes
0answers
32 views

How to skip non-empty fields in a model?

I have a model which iterates through a GDB, populating the same attribute field in every feature class with a parameter value. In this way I can mark all FC's in the geodatabase as to what project ...
2
votes
4answers
152 views

Using Loop function with arcpy.Exists()?

I have a code snippet using elif that checks if a file exists and continues to check through the letters of the alphabet (for example _A, _B, _C etc). All works fine but I think there must a better ...
4
votes
1answer
87 views

How to write to a single table via Python multiprocessing

A comment in the post Can multiprocessing with arcpy be run in a script tool? got me thinking, as I often need to do exactly this: Just beware of deadlocking situations (two Insert cursors in the ...
0
votes
1answer
42 views

Script not processing shapefiles from one folder to another

I am working on a script which takes shapefiles from one folder called "Original files", process them and then output the results into another folder named "Processed files. I asked a question on how ...
0
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0answers
39 views

How to import osm.pbf file into database with Python Imposm

I want to import a .osm.pbf file with the Python library Imposm. Currently my work flow is the following: import requests import os city_name = 'santiago_chile.osm.pbf' url = ...
3
votes
1answer
61 views

Python code for decreasing polygon size based on percentage?

I would like to decrease the size of polygons by percentage and not by distance in order to implement this into ModelBuilder to loop over a number of polygons. To my knowledge this tool is available ...
0
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0answers
48 views

Calculating distance from PointGeometry object to polyline in arcpy

I created a PointGeometry object on ARCPY and I'm trying to measure the distance from that point to the closest point on a polyline table.. The PointGeometry object has an easy function for that ...
3
votes
1answer
81 views

Copy protection via license file for ModelBuilder models?

I've build a large model in the ArcGIS ModelBuilder and I want to share this toolbox with some other people BUT I don´t want to lose control over it. The first step was to set a password to my script, ...
3
votes
0answers
37 views

Jenks Natural Breaks in Python: How to find the optimum number of breaks? [migrated]

I found this Python implementation of the Jenks Natural Breaks algorithm and I could make it run on my Windows 7 machine. It is pretty fast and it finds the breaks in few time, considering the size of ...
0
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0answers
51 views

Spatial Interpolation/Resampling of Point Surface Data - Axes @ Different Resolutions

I have a simple set of data points in x,y,z format. This was data collected from a ground penetrating radar over a physical distance of: 45m x 25m With a resulting grid of: 90 x 100 (9000 points) ...
1
vote
1answer
76 views

Where is the python library of QGIS 2.8

where is the Python library for QGIS 2.8 on a mac (10.10)? I cannot find it... sys.path in the QGIS python console gave me some path, but where the interesting part is happening it replaces the ...
1
vote
1answer
52 views

In ArcPy, How to call specific columns of attribute table?

I'm trying to figure out how to spline specific columns of a shapefile attribute table, but my question is intermediate to this-- how do I select a range of columns, e.g. the 20th column to the ...
0
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0answers
29 views

Stopping a route using attributed length

I am working in a project where I need to run routes from several points on a route network and have them stop at a specific length. I have worked out their max distance want to use this attribute to ...
0
votes
0answers
49 views

Speed up row-wise point in polygon with Geopandas

I have a geopandas GeoDataframe which contains some attributes and a geometry column which is filled with shapely Point(lon, lat) objects. Moreover, there is a GeoSeries which is equally indexed as ...
1
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1answer
24 views

Create Multiple Feature Layer and Add to MXD

I am really stuck with this one and cannot seems to get the code to execute. Every time I do so, I get the error: Input Features: Dataset [u'Test1'.....] does not exist or is not supported. My guess ...
0
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1answer
34 views

Exporting list of tables contained in *.mdb with ArcPy gives Indentation Error?

I'd like to export to excel each of the tables in a .mdb database as separate .xml files. The code works until the last line which gives an unexpected indentation error, and I'm also struggling with ...
0
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0answers
113 views

Help with python, import update csv values to feature class fields

I am trying to update a bunch of field values from a csv file where there are existing (incorrect) values in my featureclass. After searching I came across a similar post (Help with Python Update ...
1
vote
1answer
74 views

Install gdal in python on Windows7

I'm having problems installing the gdal library for python. I use a Windows 7 and have WinPython 2.7.9.2 which runs Python 2.7.9. I'd like to use gdal + Python for raster manipulation. I've read ...