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

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22 views

Help getting a Mathematical Representation within a Layer's Attribute Table

I'v been playing around with Vector Coding and was wondering if there was any Plugins out there that might let me represent Vectors within a layer as it's Mathematic attributes in the Layer's ...
2
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0answers
60 views

Help with Python/GDAL documentation

The instructions from the url http://gdal.org/gdal_tutorial.html give the following example: dataset = gdal.Open( filename, GA_ReadOnly) with the following description: It's interpretation is ...
2
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113 views

Iteratively exporting from Table to .txt in Model Builder (ArcMap) not appending correctly

I am solving a location-allocation type of problem where I use a loop to go through several specifications of the problem. The model runs fine, and produces the vizualization outputs just as expected. ...
2
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0answers
40 views

Programmatically Harvest and Disapprove Metadata - GeoPortal Server

Is it possible to synchronize an existing metadata catalog in esri's GeoPortal Server? I have access to the server, and have a script to add an XML file to our web accessible folder. After this script ...
2
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30 views

QGIS Python install question

Apologies for the 101 question; however, in trying to ramp up on python/QGIS I've seen mentioned that python.exe is the key executable in a python install. I have both Python 2.6 and 2.7 installed on ...
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46 views

How to open a second window in QGIS plugin from a button inside the main window

If I already created a qgis plugin, and i need to create a button inside that plugin that opens a new window, how is that possible? Qt creator won't add a slot unless there are a header file. I looked ...
2
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0answers
79 views

How to convert a raster file (*.tif) into a composite geodataset by using Python in ArcGIS 10.2.1

I created geotiff rasters (approximately 6000 rasters) in .tif format by using Matlab Mapping Toolbox. When I examined the properties of the data, I realised that it is 64 bit double type. I need to ...
2
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86 views

Splitting Line.shp at Point.shp with Python/ogr

I'm trying to modify some ESRI Shapefiles using Python with gdal/ogr module. What I want to do is quite simple, but I didn't find any solution by now. I have two shapefiles: (1) Lines.shp and (2) ...
2
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190 views

Link QGIS to Anaconda Python Distribution: Spyder, iPython Notebook, pip, scikit-learn

I have Anaconda as my primary Python distro, and want to route Python related QGIS scripts through it. With Anaconda, I have Spyder, can easily install packages with pip, and can launch a iPython ...
2
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189 views

Matplotlib error when installing Molusce or lifemapper in QGIS Brighton

I am installing plugins via the QGIS desktop internal interface, and have had twice now messages associated with matplotlib. The first error was for something called lifemapper and now for MOLUSCE. ...
2
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69 views

How to add column to attribute table using field calculator with $length function?

I used the following code to add a separate column to the attribute table with the length of features. from PyQt4.QtCore import QVariant from qgis.core import QgsField, QgsExpression, QgsFeature ...
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148 views

Python script for dark object subtraction on Landsat 8 Imagery

Does anyone know of any python scripts that will allow me to conduct such a process? I am limited to open source software and have minor experience in Python.
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45 views

What is the issue with geopdf format?

I'd like to add the geopdf format as output of a library that I am working on. After have looking around, I have not been able to find a (c, c++, python) library that meet my license requirements ...
2
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0answers
78 views

Iterating between two layers using QGIS python

I will try and explain my situation as clearly as possible. I just created my first plugin that is being used to analyze between various layers and give back quantities to the user. Most of it is ...
2
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0answers
96 views

Nested conditional statement in ArcGIS on multiple rasters

I have a list of rasters in ArcGIS and I want to create a conditional (Con) nested statement based on all the rasters of the list. I want this to be reiterate through many lists (the number of rasters ...
2
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0answers
74 views

Developing workaround to arcpy.asShape truncating all values to 3 decimal points?

I've read a few questions\answers about converting a GeoJSON Shape into an ESRI Object. Unfortunately most of the answers pointed to decoding the dictionary's manually. Im a bit more lazy ^_^ The ...
2
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0answers
42 views

How to move feature using python console in qgis

i am building a qgis plugin that can create as much copies of a selected feature as i want and paste it to my required place.I have code to copy and paste feature select = ...
2
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0answers
88 views

Kartograph - AttributeError: _Shape instance has no attribute 'parts'

I am new to GIS and open source tools so bear with me. I am attempting to convert a shapefile to svg by running kartograph as a python module. My source file (provided by the local GIS ...
2
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0answers
65 views

Validating whether PDF file Uploaded as part of Geoprocessing Service of ArcGIS for Server?

I'm developing a Python Script that will be a Geoprocessing Service in ArcGIS Server. The Script has a Button for Users to OPTIONALLY Upload a PDF. If the PDF is Uploaded it gets inserted into the ...
2
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96 views

PyQGIS add WMS layer with CQL_FILTER

Dear PyQgis developers! I'd like to add a wms layer through my QGIS plugin with custom CQL_FILTER parameters. My problem is, that the CQL_FILTER parameters are not passed to the GeoServer (I can see ...
2
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0answers
46 views

How to Use GetGeomtype Gdal Python

I am just wondering what I am doing wrong when trying to use the GetGeomType. I need to focus on separating layers from a pix file. Two categories are the bitmaps(which are vectors) and then the ...
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170 views

Script to unzip a file geodatabase fails with Memory Leak

Hijacked the ESRI script to unzip. After research I found there is a memory leak. There are three zip files I download on a regular basis. Each .zip contains one (1) .gdb. The largest is 2 GB zipped, ...
2
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88 views

QGIS 2.2.0-Valmiera 64bit on windows 8.1 displays error while creating ROI in SAC plugin

I don't know what happened while creating ROI during Classification using Semi automatic Classification Plugin 3.1.0 "Rome" installed on hp Pavillion i7 with windows 8.1 When i started to generate ROI ...
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65 views

Identifying certain polygon from overlapping set

To clean up a large shapefile, I am looking for a way to do the following: I have the ID of many polygons which need getting rid of stored in a list. These polygons are villages and a second ...
2
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147 views

N Nearest Neighbours efficiently PostGIS/Python

The data is worldwide about a million points, lat/lons, with an id and an importance value (0.0 to 1.0), and it's limited to being on land. Ideally I need to cluster all 1 million points into 100,000 ...
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103 views

Run a large model by calling it in a python script?

I've created a rather large model containing a sub-model that calculates the volume of water basins(playas) in a relatively flat area of Texas. The volume is taken from one foot slices of each each ...
2
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67 views

Run an ERDAS Imagine pmdl (or bcf) via Python?

How (or is it) possible to run an Erdas Imagine .pmdl model from a Python script? I have successfully run .eml models but cannot get the syntax right for .pmdl Here is what the line I want to run ...
2
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67 views

Where is my Polygon?

I created this script to merge all of the polygons in a shapefile into a single polygon. I am using Python 2.7.5, Shapely 1.3.0, and Fiona 1.1.5. def merge(path_in, path_out): #Import Libraries ...
2
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69 views

Any solution to mosaic Modis MOD13Q1 using batch file?

I have a Modis MOD13Q1 product for Pakistan, four tiles cover my complete area and I have data consisting of 14 years, after every 16-day interval. I want to mosaic them using a batch file which ...
2
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85 views

lat/lon of intersection between line of sight from a given lat/lon and altitude above ground

Given a starting latitude, longitude and altitude, and a line of sight defined by azimuth and elevation, I want to find the latitude and longitude (assuming spherical Earth, WGS84 or other) where the ...
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68 views

Memory layer or QgsVectorFileWriter Error?

Currently this excerpt of code will not save to file (as it is supposed to). The memory layer is visable and editable. Yet even when manually saving the layer, any priorly added features ...
2
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62 views

(How) can I write string data to a raster with Python/GDAL?

In Python, I have a NumPy array of string values (categories of some variable) that I'd like to write to a raster file (.tif or .img) using GDAL. The impression I get is that it's not possible to ...
2
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0answers
51 views

Align & Sum Grids in Python

I have two grids. One, call it A, is 4320x2160 cells and spans the whole globe. The other, call it B is 8640x3432 and spans the circumference of the globe, but is clipped toward mid-latitudes. Both ...
2
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0answers
84 views

Saving/Loading QGIS style .qml and avoid specified symbology

Is it possible to save QGIS styles without the symbology style? This may seem like a strange question, but I am trying to automatically set the ValueMap widget under layer properties via a plugin for ...
2
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0answers
67 views

How to sort a column in attribute table programmatically

Is there any way to sort ( alphabetically ) a column in the attribute table programmatically (without clicking on the column header) in QGIS ?
2
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0answers
33 views

How to snap dangling nodes with prescribed angle?

I have got a streets shape file, to snap the dangling nodes in ARCGIS. But, I have to snap only some nodes(of feature) with a prescribed angle (green node in the image, and the angle marked in ...
2
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0answers
35 views

Polygon parcel division in python

Is there an open source tool or module in python that does parcel division of polygons like in ArcEditor?
2
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0answers
74 views

developer problem with PyQGIS

I am a QGIS developer. We have been modifying the source code of QGIS for several months and have done good work in QGIS version 2.1. After that we tried to do the same modifications for QGIS version ...
2
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0answers
211 views

Why does python reads only the no data value from GeoTiff file?

I had a number of tiff files with a country's map. They had different rows, columns or different projections etc. I needed to make them with same projection, spatial resolution and same number of rows ...
2
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0answers
48 views

how to make a list of features constructing the dissolved feature?

I need to simplify my road network using the dissolve function to remove nodes not occurring on the intersections. the following code is doing that. arcpy.Dissolve_management(self.address_cor_layer2, ...
2
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0answers
120 views

How to get QGIS to play with pandas (Windows)?

has anybody been successful getting pandas to work with QGIS's Python installation, on Windows? I've used the OSGeo4W installer to install QGIS2.2, which comes with Python 2.7 and Numpy 1.5.1. Any ...
2
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0answers
93 views

How to detect turns of a route?

I'm doing a Python simulation of a vehicle, driving along a specified path. I generate dummy GPS readings, that fetch the current position of the vehicle, with some randomized error added. After a ...
2
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0answers
66 views

How to add nodes into graph

I'm new to qgis and in here I want to find a path between two selected points on the map(Roads-vector layer). The points are selected by the user, using mouse clicks. So here I used the astar ...
2
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0answers
553 views

Running x64 bit geoprocessing Python in Python IDLE 2.7.6 x64 error

I am trying to set the Python IDLE 2.7.6 x64 to run the arcpy module from ArcGIS x64 bit geoprocessing (10.2.2). I copied the file DTBGGP64.pth from C:\Python27\ArcGISx6410.2\Lib\site-packages to ...
2
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0answers
132 views

Convert a classification image to aggregated polygon in shapefile using gdal/python

My goal is convert a 2D numpy array to shapefile. The matrix results from a classification, so the numbers have a meaning. I solved my problem, but the solution is somehow involuted and complicated. ...
2
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0answers
94 views

Can't remove the little islands when creating a svg map with kartograph.py

I'm new to python and to kartograph. I'm using it to create a map of France, Italy, Portugal and Spain. But I don't want the little islands (mainly the French ones ), causing the generation of a big ...
2
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0answers
120 views

PyQGIS: How to color raster layer with existing colorBrewerMap

With pyqgis I have added multiple new raster layers to the legendinterface(). Because i like the ColorBrewer style i want to color some of them with the "Spectral" gradient. How can I do this in ...
2
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0answers
208 views

ArcGIS10.2 crash opening python window

I was trying to test the data management commends in python, yet arcgis crash every time I I try to open to python window. According this post, it is the python version issue. I do have other versions ...
2
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0answers
155 views

Decompress a LZW-compressed GeoTIFF

I have a LZW-compressed GeoTIFF file and would like to split it into several smaller regional files and change the format to png. I tried to do the spliting with gdal_translate -srcwin. I only get a ...
2
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0answers
64 views

Compare line with next line in attribute table shapefile

I am making a python code for ArcGis 9.3. The aim is to compare the value of my field "ID_BV" at line l with value of field "ID_BV" at line l+ 1. And depending of the test answer i populate another ...