Tagged Questions

Software plugins that add functionality to the QGIS package

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11
votes
0answers
266 views

Python Plugin Development in QGIS: How to access label text?

I'm trying to create some custom labels for point features in a QGIS point vector layer, and I want to write a python plugin to do it. We need our labels to be presented with color tinted rectangles ...
3
votes
0answers
51 views

How to write an address search plugin?

I am migrating some users from MapInfo to QGIS, and before they sign off on it, they want a very simple address search in the same way that we currently have one working in MapBasic. I;ve been having ...
2
votes
0answers
25 views

Rounding error in qgis point sampling tool

I'm not sure if this is a bug or of it is due to the implementation. I am using a raster that has values greater than 1,000,000 and Qgis displays these numbers in a scientific notation. For instance, ...
2
votes
0answers
65 views

Python Script that calls the Voronoi Polygons Function?

I've been looking to see if there was a way to call Voronoi Polygons function found in Vector/Geometry Tools, directly from the code but I have not found one. Does this currently exist? Is there a way ...
2
votes
0answers
26 views

How to install statist plugin in QGIS / OS X

I am stuck with installing a plugin for QGIS namend "Statist". I get the following message when starting QGIS: "Missing matplotlib Python module". So basically this question relates to all plugins ...
2
votes
0answers
87 views

Install Georeferencer Plug-in QGis 1.7.0 OS X

I'm trying to install the Georeferencer plug-in in QGis 1.7.0 on Mac OS X (10.5.8). However the plug-in doesn't show up in the list. I have used "enable 3rd parties directory" and I have checked ...
2
votes
0answers
50 views

Is there a way to distinguish between digitized and pasted features?

Is there a way to tell if an added feature in QGIS is in fact a newly digitized one or a pasted feature? I think QGIS is treating both cases in the same way, emitting the same signal: ...
2
votes
0answers
136 views

Postgresql Query Plugins Not Returning Results in QGIS

I'm using the Fishnet function as described here to create a grid. If I use the following SQL to call the function to position a grid where I want it (I'm using NZGD2000 SRID = 2193) the query ...
2
votes
0answers
38 views

QGis, add dialog and classes to plugin

what are the steps to add files that represent a uidialog(draw with QTDesigner), and add the necessary python class files, using the default makefile provided with qgis plugin builder? thanks,
2
votes
0answers
202 views

How to access mysql data from python built-in console?

I'm writing a QGIS Plugin, and somewhere I want to present data from a MySQL database. It's simple data(strings,etc), not Geospatial, or vector data. I'm familiar with querying databases from python ...
2
votes
0answers
178 views

Freehand plugin query

I've installed the QGIS 'Freehand' plugin and I have a query regarding it. When drawing a polygon qgis automatically closes the polygon when the pen leaves the graphic tablet. Is there any way to ...
2
votes
0answers
61 views

Is there a way to link eVis with time manager in QGIS

I have a point vector layer created from way points of a GPS. I then used the eVis plugin to view geotagged photos for each of these point. I also used the time manager plugin to play through the ...
2
votes
0answers
143 views

Are there Plugin Compatibility Issues between QGIS 1.6.0 and 1.7.4?

I've been working on a QGIS plugin on Quantum GIS 1.6.0 Copiapo with Python 2.5 that calculates additional values for eachf feature of a vector layer and adds them to the .dbf. We've just upgraded to ...
2
votes
0answers
363 views

Trouble with Python plugins on QGIS

This question has been bugging me for a while now, and I still haven't managed to solve it, so I'm giving it another go, hopefully someone may help me out. I've been having problems loading several ...
1
vote
0answers
14 views

GDAL Plugin with a different version of GDAL aready built into QGIS

My qgis windows version is 1.8.0 Lisboa and use the gdaltools in version1.9.2. I want to use the plugin NetCDFBrowser, but this plugin need the gdal 1.10. I install 1.10 stand-alone gdal find here ...
1
vote
0answers
92 views

Line to Polygon via Polygonizer in QGIS

My question is in the same vein as this one. I'm attempting to convert precipitation lines (Precipitación Media Anual) to a polygon for Mexico in QGIS using the Polygonizer plugin. After running the ...
1
vote
0answers
67 views

GRASS Plugin to QGIS error

I am installing QGIS and GRASS as part of an FOSS GIS class I'll be teaching this summer. I used the OsGeo4W installer. This installer has always worked flawlessly for me except on the machines at the ...
1
vote
0answers
31 views

QSpatiaLite: Cannot create table

I am running QGIS 1.8 (SpatiaLite 3.0.1) and QSpatiaLite 6.0.1. I have a spatial table EventPrecise (with geometry column p in EPSG:4326). I want to join this table with another, non-spatial table ...
1
vote
0answers
84 views

Are there limitations with gdal virtual raster option?

I am new at Postgis and I'm groping... I pretend to rasterize some weighty vector layers in Postgis, do some map algebra and reclassification with them and visualize intermediate as well as final ...
1
vote
0answers
82 views

How to draw nodes of a graph in Python and link them to a table?

I would like to draw some points with a Python GUI, like a graph, and link those points to a table.
1
vote
0answers
87 views

'File is too big' error when uploading QGIS Plugin

I have written a simple QGIS plugin which zooms the map canvas to a user specified UK postcode. I would like to share the plugin but the csv file, which contains stripped down OS Code-Point open data ...
1
vote
0answers
33 views

Handling save event in QGIS

I have managed to load QgsVectorLayer from PostgreSQL and add it on the map. Is possible to trap save event after editing, do my own saving, call layer refresh and in this way prevent from default ...
1
vote
0answers
89 views

How to handle mmqgis geocoding IOError: [Errno socket error] [Errno 101]?

I try to geocode a .csv file with QGIS + mmqgis plugin. But, since some days the plugin always crashes. I tried it with QGIS 1.8.0 on an Ubuntu 11.10, OSGeo-Live v6.0 (which is Xubuntu 12.04.2 LTS) ...
1
vote
0answers
78 views

How do I fix this QGIS sextante error? NameError: name 'sextante' is not defined

A colleague of mine posted this the other day. We haven't got any nibbles yet and I wanted to elaborate on the issue. We are having trouble running the r.mapcalculator function and receive the error ...
1
vote
0answers
48 views

how to add wms to QGis via cpp-plugin

I try to add a wms-Layer to QGIS Desktop from my plugin(c++) QString uri= ...
1
vote
0answers
126 views

How does QGIS execute Python plugins?

I am trying to run a python script from within a python plugin. The script runs a CGIHTTPServer in a separate thread. It works as expected when executed from the command line and i can issue requests ...
1
vote
0answers
182 views

How to debug 'Layer is not valid error' from Python plugin?

I'm trying to understand what goes wrong with a QGIS python plugin. Basically I'm trying to render a series of POINT. The query works fine, at least giving it by hand from inside PostGIS DB: "SELECT ...
1
vote
0answers
47 views

Error reading repository: QGIS Official Repository HTTP request failed

I can't seem to access the plugin repository. Is this an issue with my system or is there something going on at the server end?! I get the following error as wells sometimes a window saying: "Error ...
1
vote
0answers
280 views

QGis CadTools CAD Console

I need help with the Qgis CadTools CAD Console commands. According to these help files there are six commands. I just can't get them to work. Can someone help me? Thanks
1
vote
0answers
37 views

How to find a feature on map by its field data

I'm using QGIS 1.8.0 & got much help to find a Featuer using 'Quick Finder' plugin. Is it possible to locate a Feature (using a similar plugin like'Quick Finder'), on map using its attribute data ...
1
vote
0answers
143 views

Qgis Plugin development with postgres data

can someone help me with initial developing on qgis plugin that displays postgres data table on a QTTableView or QTTableWidget? So far: I can connect to database using psycopg2 or using ...
1
vote
0answers
42 views

How to call a method when self.iface.actionSelectRectangle().trigger() is released?

In my QGIS python plugin I use "self.iface.actionSelectRectangle().trigger()" to select features. I also have a button which changes the attributes of the selected features. Is there a way instead ...
1
vote
0answers
138 views

Problem using addVectorLayer() in Qgis

I am confused a bit, using addVectorLayer() in QGIS plugin. I want to add and display a vector layer, directly when QGIS opens. Hence I am using addVectorLayer() in _init_() function of my plugin. ...
1
vote
0answers
264 views

How to change feature's geometry?

Hy, I'm creating my layer like this: crs = core.QgsCoordinateReferenceSystem(4326, core.QgsCoordinateReferenceSystem.EpsgCrsId) uri = "Polygon" uri += '?crs=' + crs.authid() uri += ...
1
vote
0answers
213 views

What do I need to build a C++ plugin on windows 7?

I want to make a plugin in C++ and I need to write and build it in windows (Im better with *nix systems). While I have skimmed the various updated C++Plugin docs I can understand if I need to build ...
1
vote
0answers
67 views

QgsComposerArrow

>>> QgsComposerShape <class 'qgis.core.QgsComposerShape'> >>> QgsComposerLabel <class 'qgis.core.QgsComposerLabel'> >>> QgsComposerLegend <class ...
1
vote
0answers
64 views

Postgres Layer not showing as editable when creating an offline project

My postgres layer in a QGIS saved project does not appear in the "Creat Offline Project" dialog as editable. I want to check it out for offline editing? If I uncheck the "Show only editable layers" ...
1
vote
0answers
74 views

Setting border-style to 'no pen' using QgsGraduatedSymbolRendererV2

I am developing a QGIS plugin that, after a series of inputs, will produce a thematic map using the QgsGraduatedSymbolRendererV2. Because the polygon are very small, the boarders make it such that ...
0
votes
0answers
13 views

How can i use openModeller plug-in for QGIS?

As far as I know, niche modeling is possible in the old version of QGIS by using openmedeller plug-in. I want to use 'openModeller' using the current version of QGIS(v 1.7.4). Is there any solution to ...
0
votes
0answers
36 views

Use QuantumGIS to bulk-import csv files

I have a large set of .csv-files containing geographic information. Every dataset consists out of 2 .csv-files! This is my folder-structure. All files in Tracks are formatted equally and all in Routes ...
0
votes
0answers
64 views

QGIS Plugin Development - Displaying Data from a feature

I want to display data based on the feature currently selected/clicked on. I am following a tutorial from http://www.qgisworkshop.org/html/workshop/plugins_tutorial.html. It initially shows you how ...
0
votes
0answers
34 views

Is QGIS OGR plug-in data provider (based on Postgres) limited to 500 features in layer?

I developed a plug-in based on OGR. It works fine but when I want to add a vector data (using my plug-in) I get 1449 features (with 76 columns) in my layer. Then I select this layer and load it. ...
0
votes
0answers
24 views

'module' object has no attribute 'NullFID' issues installing QGIS Sextante

I have a problem installing the sextante plugin on linux debian. I get the following error: The plugin is broken. Python said: 'module' object has no attribute 'NullFID' I am new to qgis. Your help ...
0
votes
0answers
34 views

how to reinstall QGIS contour plugin via OSGEO4W

recently reinstalled qGIS 1.8 and Grass 7 via OSGEO4W to fix problems with spaces in command modules for other features i want to use - recc'd on here and all went great. amidst the final steps of ...
0
votes
0answers
47 views

Command-line exporting QGIS layers to MapServer map file

I know about the QGIS plugin for exporting loaded layers as a MapServer map file, and I would like to know if there is a way to achieve this via terminal. I cannot find useful info on the web.. ...
0
votes
0answers
153 views

How to fix Geocode plugin Google API Key errors in QGIS 1.8?

within QGIS 1.8 I am tring to use the "GeoCoding Plugin" (Author: Dr. Alessandro Pasotti) but it gives this error message: Traceback (most recent call last): File "C:/Documents and ...
0
votes
0answers
35 views

How do I get XYtools to work in OS X 10.8

This is the first question I have asked here so I hope I am not asking in the wrong place. I have an installation of qgis (1.8 lisboa) and I want to use the XYTools python plugin. I have installed ...
0
votes
0answers
25 views

EVent on a button - plugin qgis

Good evening everybody, I made a plugin on QGIS by using "Plugin builder". WHen i finished, i edited the ui file on Qt4Designer in order to modify the form, and puted a button. After that, i ...
0
votes
0answers
84 views

question on terrain analysis in qgis particularly slope from .5 m dem

Trying to create representative slopes from .5 dem. It seems to do a wonderful job with the stream bottoms and also with the general trends. It shows it to be steep where steep and flat where flat. ...
0
votes
0answers
45 views

Different Operation of the qgis library (C++)

I compiled a QGIS sample code (open raster file), but when I choose a file I get an error: "not valid recognized data source". But when I run QGIS that is compiled from source code it will open ...

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