Software plugins that add functionality to the QGIS package

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148 views

How to make a routable graph from a Point and a Line shapefile, using Networkx?

I have one shapefile which consists of all the streets in the study area, and another shapefile which has points representing origins and destinations. I would like to know if it's possible to find ...
1
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2answers
83 views

Qgis “Layers menu from project” plugin doesn't open files

Has anyone out there any experience with a plugin to Qgis called Layers menu from project? This plugin gives you fast access to layers that you specify in a Qgis-project file. It won't work on my ...
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0answers
31 views

Plugin Ui interation with user and Qgis

A downsized hydrogeology plugin ( GraphicGroundwater = GGW ), instilled the need of a reduced combination of Carson's 'fTools doVectorGrid' and Pryet's 'Qgridder' plugin(s). The GGW Ui is displayed ...
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0answers
25 views

Why does the “calculate” button remain gray in Group Stats Plugin?

I'm trying to use the Group Stats Plugin. I found your tutorial and I wanted to post a comment but I have seen that it is not possible then I thought to write here. Unfortunately I can not use the ...
1
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1answer
29 views

Why are some QGIS 2.2 bar graphs not displayed?

I created a vector layer containing all European countries and some double information about them. I'd like to show this information for every object in a bar graph. My problem is that the bar graphs ...
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0answers
18 views

Shortest path plugin error in QGIS 2.2

We are having a problem with the Shortest path plugin in QGIS 2.2. In the configuration screen it does not appear our layer as a selectable layer, so no computation can be done. Is there anyone else ...
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3answers
164 views

What is the math behind rasterization?

I'm taking the first steps in QGIS (version 2.2 Valmiera) and I am having some difficulties in knowing what mathematical criterion that QGIS uses when converting polygons (shapefile) to raster. I'm ...
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0answers
14 views

QGIS DBmanager import file append not working [duplicate]

I am using QGIS and connecting to Postgresql database. I want to import shapefile data into database table via DBmanager tool. But Append data to table selection is inactive like following image. I ...
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31 views

what is the math behind rasterization? Doubt [duplicate]

In Figure 4 you can see how the overlap is not complete (marked with circles). What I would like to know which algorithm that QGIS uses the rasterization? What is your standard? Is there a percentage ...
1
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1answer
258 views

How to add the attributes of selected features to my new layer in pyqgis

I am trying to create a layer from the selected points coordinates. I am drawing a circle to the coordinate of selected points. I also need to add initial attributes of my selected features to my new ...
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0answers
12 views

Pan Geotiff View to input coordinates in QGIS

New to QGIS. Does QGIS has a tool that allows for user to input the coordinates eg UTM and then set the view to the input coordinates. Here I am working with a geotiff that has embedded UTM ...
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3answers
674 views

no Get More in Plugin Manager in qgis 2 + ubuntu 13.04

After upgrade of qgis 1.8 to qgis 2.0 I couldn't find the choice "Get more" in Plugin Manager and I can't install plugins.
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24 views

Semi-Automated Classification Plugin ROI Creation Failure

I can't get the Region-growing to work when running the ROI creation module. What am I missing? Please see the "AttributeError" line halfway down: # An error has occured while executing Python ...
1
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1answer
151 views

OpenLayers Plugin with on-thy-fly-transformation causes wrong coordinates

I am using the OpenLayers Plugin with the maps from Google Satellite. In Qgis I have chosen on-the-fly-transformation into WGS 84. But the WGS 84 coordinates in Qgis are now 0.15 degrees further E ...
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1answer
82 views

Developing QGIS plugin on Mac - GDAL

I'm developing a plugin for QGIS called DEMtools. It runs fine on my linux machine, but is causing me headaches when run on Mac OS X Mavericks (surprise, surprise). I keep getting segmentation faults ...
2
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1answer
123 views

Python Error while installing QSpatiaLite in QGIS 2.0

I'd like to install QSpatiaLite to my QGIS2.0 but the following error massage occured while installing with the pluginmanager: Couldn't load plugin QspatiaLite due an error when calling its ...
1
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1answer
237 views

How to make GRASS and SAGA tools capable to use in QGIS?

As my title, I installed Qgis, GRASS and GDAL by osGeo4w package, and as I finish the installation, I want to use GRASS tool, I face this problem: But I already installed GRASS and SAGA, how to make ...
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1answer
46 views

Errors uploading plugin to QGIS python plugin repository

I'm trying to upload my first plugin to: http://plugins.qgis.org/plugins/add/ I keep getting the following error: There were errors reading plugin package (please check also your plugin's ...
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0answers
50 views

How to cluster points based on both proximity to each other and proximity to another layer (roads)?

Using QGIS I have managed to created cluster for points based on their proximity of each other (using buffer and spatial joins etc), but I would also like to add another variable to it: proximity to a ...
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1answer
14k views

How to install a QGIS plugin when offline?

Due to various IT policies at my workplace, QGIS is installed on a machine that is not connected to the internet. I wish to install a couple of QGIS plugins on this system. I have downloaded the ...
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1answer
70 views

How to open most recent directory using PyQGIS?

For example, when I add a vector layer, next time that I want to add another layer it opens up where I chose my last layer from. How would one implement this in Python and/or PyQgis? I'm writing a ...
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0answers
56 views

QGIS how to patch a plugin on local machine

I want to make a minor modification to a plugin (to change a field width in Table Manager). I edited the .py file and the .ui file and changed what I think are the right numbers but this seems to ...
1
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1answer
223 views

What exactly is the min/max of an extent? (QGIS heatmap plugin)

I'm having a hard time making the heatmap plugin do precisely what I want (namely, to make a heatmap showing not only points but an attribute of those points), and now I'm thinking that I may be ...
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0answers
41 views

Error opening Google layer in QGIS

I'm using QGIS to open my postgis layers based on Google Maps. But with some I am not having success, an error that generates a dump in the temp folder of my Windows user file occurs. To investigate ...
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0answers
19 views

Parsing file didnt appear in textBrowser

I make QGIS plugin to parsing xml and show parsed file in textBrowser, however when i run the plugin, its still blank ( nothing happend ) and i didn't get error messsage when run it, this is the full ...
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45 views

Visualize bounding box to square like polygon

I want to add script in my plugin to visualize bounding box into a polygon shape, bounding box i try to visualize have format like this: (X1,Y1) (X2,Y2) (X1,Y2) (X2,Y1) Does QGIS/PYTHON have ...
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1answer
208 views

Openlayer plugin in QGIS, error in projection 3857 Pseudomercator

I'm using QGIS plugin Openlayer to set the background of Google satellite under my vector layer. However, even if I project my layers as EPSG 3857 (the default and only possible projection for ...
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0answers
15 views

Invalid geometry plugin

The problem I have now with qgis 2.2.0 is getting and installing the LWGEON provider plugin for validating the invalid geometry.
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0answers
18 views

Is it possible to override default QGIS error messages?

From my QGIS plugin I would like to override/replace one of the the default QGIS error message ("The layer layer_url is not a valid layer and can not be added to the map") with my own message. I have ...
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2answers
481 views

How to set Eclipse and PyDev for QGIS when ArcGIS is installed?

I have got a lot problems with the configuration of Eclipse with PyDev in order to develop QGIS plugins. The situation is very weird and frustrating. I can import qgis module using Pyscripter without ...
2
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1answer
190 views

How can I make the topology checker plugin ignore very tiny errors?

I'm a QGIS2.0 user. Topology checkers is a very valuable for me as a data creator. I use this plugin for checking data quality. But, this plugin finds too much errors include very, very tiny ...
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2answers
68 views

It is possible to make snap using Google Maps based on QGIS?

Vectorized few lines using QGIS with Google Maps as a base. If I do not Trabachar with maximum zoom does not respect the topology of the base. It is possible to make snap using Google Maps based on ...
4
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2answers
742 views

How to Polygonize a polyline shapefile in QGIS 2.2?

When I used QGIS 1.8, I was able to transform polyline layers to polygon layers with the Polygonizer plugin. In QGIS 2.2, this function has been subsumed into the Processing toolbox. Unfortunately, ...
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0answers
39 views

Is the “1-band raster colour table” plugin available in QGis 2.0?

I used to use the "1-band raster colour table". Is it still available in QGIS 2.2.0? It seems like I can't install it (I don't find it in the list of plugins available, even after installing the BC ...
1
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1answer
47 views

Error in LineEdit when show parsing value as string

I m trying to make QGIS plugin to open xml, parse it and then show value i parse from xml to line edit, i use this code : from PyQt4 import QtCore, QtGui from ui_testparse import Ui_testparse import ...
1
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1answer
183 views

models from QGIS 2.0.2 to Python scripts?

I want to automate some tools for QGIS 2.0.2 using Python. Previously I have used ArcMap for automating tools and now i want to use QGIS. In ArcMap I used the ModelBuilder, and more specifically the ...
1
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1answer
188 views

How to use Threads in PyQgis, mainly to keep UI active?

I'm trying to develop a plugin, which does heavy computations and as a result, user interface becomes inactive. I know that I should use threads to keep the UI alive (specifically, I have a progress ...
4
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1answer
215 views

Where to report QGIS and QGIS-Plugin bugs?

I often find bugs in Qgis and its Plugins. I would like to ask about this on the internet but I do not seem to find the proper place to address this issue. Are there any instructions?
2
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1answer
83 views

How to edit a QGIS plugin GUI?

I have inherited a QGIS system from a former employee and my predecessor built a custom plugin for it. I now need to remove a single checkbox option completely from the UI for this plugin. Is there a ...
5
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3answers
261 views

How to export a Vector Layer with OGR2Layers Plugin

I'm using QGIS 2.0 Dufour on my Linux (Ubuntu 12.10).I'm download shapefile of Croatia country from this site (http://www.gadm.org/country) and i added a new vector layer where i created some ...
1
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1answer
180 views

How can i use python QGis network analysis library to calculate short path based on speed and distance?

I want to calculate and show short path from starting point to an end point in a qgis python plugin. in my research i stopped by an article about QGis network analysis library; ...
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0answers
44 views

How to include external libraries with my QGIS plugin?

I'm developing a plugin which makes use of "networkx" library extensively. However, networkx is not part of Python libraries pre-installed in QGIS. Is there a way to include this library with my ...
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0answers
46 views

Spatialite database creation problem (QGIS DB manager)

I am trying to create a Spatialite database in QGIS 1.8.0. Step one of instructions is: Right click on the Spatialite entry in the Browser tree and select Create Database. The Spatialite icon is ...
0
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1answer
37 views

Changing band for greyscale in plugin

I am trying to make a qgis plugin to change which band in a multiband data set (netCDF where the band represents time steps) is used for a grey scale rendering. The file works fine with manual ...
0
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0answers
18 views

Select Single Feature

I'm making a plugin in quantum gis 1.8 Lisbon. And I intend to select the value of fields in a table, when I click the mouse over a point. (Ie something similar to Single Feature Select tool). Does ...
0
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1answer
150 views

How to export a map (satellite image, 3 bands) to Tiff without losing the resolution in Qgis.

I manually improve the colour contrast of landsat images. The printing in pdf afterwards is OK, as it maintains the resolution due to the high dpi. Now I am interested to obtain a kmz/kml file of the ...
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0answers
80 views

Programmatically modify layer datasource on project save event (QGIS)

I have a QGIS plugin which allows users to add WFS/WMS layers to the map. I would like to be able to scramble the user ID part (token) of the uri when the project is saved/closed and then use my own ...
7
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3answers
514 views

How to use ZonalStats plugin?

I am using QGIS 1.8.0 on a Windows Home Premium 7 machine. I have a single band TIFF that is 187 MB in size. My vector polygon shapefile represents a regular grid of a 147x112 36kmx36km grid cells. ...
1
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1answer
90 views

Unknown error concurring when developing QGIS 2.0.1 plugin in Windows 7

I am following the tutorial found here for developing a simple QGIS plugin within QGIS 2.0.1 installed on Windows 7. However, as I have began to try developing a link between the GUI and each the ...
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0answers
50 views

I'm looking for an idea to calculate shortest path in a line Vector layer using a starting point

I'm looking for an idea to calculate shortest path time in a line Vector layer using a starting point in a qgis python plugin based on distance and speed. is there a solution where i can get ideas? ...