Software plugins that add functionality to the QGIS package

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insertVertex giving false in pyQGIS

I have this code from my plugin which work in Qgis 1.8 and I am trying to make it work in 2.0. I want to insert a coordinate x and y into a polyline after the last entry. points = geom.asPolyline() ...
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24 views

Why is node tool deleting unselected points in lines?

I am freehand editing lines to a shapefile on Mac QGIS 2.2.0, and have my snap settings at vertex and segment @ 20 pixels. The lines are roadways and I have merged them all into one feature and merged ...
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41 views

Error openlayers plugin in qgis [duplicate]

I did the following steps: I put the projection in 3857 and I enabled the project on the fly Open a vector shape layer in the projection 4326 I enabled the openlayers plugin Clicked enabled ...
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18 views

Query from plugin that shows result on Map and in Attribute Table

I'd like to create a plugin that performs a static (no user input required) query that, based on a condition, selects all the features on the map and displays these in the attribute table. I have the ...
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31 views

What does this python error in terrain profile plugin mean?

I get this message when trying to create cross sections from a raster layer. It happens only when I try to plot from a selected polyline. When I choose temporary polyline, the plugin works fine.
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1answer
390 views

Replacement of QVariant and setAttributeMap in PyQGIS

I am updating a plugin for QGIS 1.8 to QGIS 2.x. I have the code below. The setAttributeMap does not exist anymore. I have replaced it with fet.setAttributes and it seems to work. When using ...
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38 views

Using QGIS ComboBoxManager: adapting for QGIS plugin

I'm looking for more guidance using the QGIS ComboBoxManager module (http://3nids.github.io/qgiscombomanager/). After finally getting the imports correct, I'm trudging my way through learning how to ...
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51 views

Check if Openlayer Layer is empty, caused by nonexistence of internet connection?

I use Openlayer Google street map as a base-map in my QGIS plugin projects. i want to check programatically if the layer is loaded or is empty and decide if i load my offline base-map instead of ...
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2answers
57 views

What is the closest CRS to “Meridiano de Greenwich”

I have a 1906 scanned map that I am trying to georeference in QGIS for Mac. The map has French and English lat-long, indicating them as either "Meridiano de Greenwich" or "Meridiano de Paris." I would ...
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1answer
876 views

How to create a dock widget correctly in QGIS plugin?

I am building a QGIS plugin and would like to use a dock widget. I have used QT creator to design the UI, with the object type being a QDockWidget. When the plugin is enabled in QGIS the dockwidget ...
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11 views

GarminCustomMap: crash without error

My GarminCustomMap crashes without an error. Im using qgis 2.2 on Xubuntu Precise. I tryed with different settings but after 2 - 6 seconds QGIS crashes without any error. What could be the problem? ...
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17 views

Every time I use the Distance Matrix my program stops responding

I get to the point of having all of my information in QGIS, and am attempting to save a .csv file in the Distance Matrix. I browse to an output distance matrix, click ok, the bar fills up to 100% and ...
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1answer
92 views

How to select and zoom in features from a QGIS Python Plugin

I'm very new to Python. I'm trying to find a way to select and zoom to the features from a QGIS layer. I've created a plugin and built a custom form. I have 3 values from the form which I need to ...
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2answers
98 views

How to number points along a line consecutively

I have a line and along this line I have different points which are max. 20m away from that line. Now I would like to number the points along the line, like shown in the grafic. Any suggestions how to ...
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1answer
39 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 ...
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2answers
603 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 ...
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1answer
305 views

How to update a QGIS plugin for new version (2.2)?

The updates to QGIS 2.2 have been fantastic and I'm really liking the improvements to the interface, features and performance. However, it seems that some plugins have not survived the upgrade. ...
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1answer
34 views

How to do a search in a line to a specific point

I'm using QGIS 2.0.1 Dufour. I'm working with a shape file made by a single line that represents a road with 30km. In that line I want to attach pdf files containing information about some points in ...
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52 views

QGIS plugin, extending plugin stub, instance has no attribute error

Update This is not an answer to why it does not work when the method is defined inside the class, but a workaround. Simply defining the method outside, prior to, the class (something that Evil ...
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2answers
90 views

How to use eVis to launch AutoCAD with a relative path?

I found this post, which leads me towards what I need: How to link to external files with relative path in QGIS actions? Now, I'm trying to use the eVis plugin to open .DWG and .DXF by launching ...
2
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1answer
530 views

Installing LASTools to QGIS on a Mac (or other LAS processing plugins)

I recently saw this link how to install LAStools toolbox to QGIS. The problem is that the instructions are only for Windows users. Now I wonder if it's possible to install LAStools on a Mac with QGIS ...
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124 views

OpenGeo Explorer connect to geoserver

Just a quick and easy question. I have installed OpenGeo Explorer as a plugin to QGis for publishing seamlessly to a web based geoserver (hosted through AcuGIS). I have pointed to the server through ...
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1answer
89 views

Purpose of “myPlugin_dialog.py” file created by QGIS Plugin Builder

I usually use QGIS Plugin Builder to create working templates for QGIS plugins. While a generic Python plugin needs the files below; __init__.py metadata.txt resources.py (translated from ...
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1answer
147 views

Threejs “Failed to generate a dem file using gdalwarp. gdalwarp is not installed.”

I am trying to test out the new threejs plugin for QGis and have come across this error. Failed to generate a dem file using gdalwarp. gdalwarp is not installed. I have installed the latest ...
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1answer
70 views

How to use ArcView GIS extension in QGIS or how to convert one to do so?

I really would like to know whether is a way to can work with ArcView GIS extensions at QGIS? or at least a way to be converted to plugins at QGIS?
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1answer
1k views

AttributeError: 'module' object has no attribute 'Open'

Hy, I am running the following code which I found on: GDAL - Perform Simple Least Cost Path Analysis which I adapted to my case, but I get the following error when running the code in the python ...
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1answer
360 views

visualize bounding box to a polygon

I try to make plugin in QGIS that compare 2 bounding box data, ex: (-32.61442167739459, -32.017601026186576, 13.015663782506067, 13.428145228091406) and (-38.6102467739459, -38.017601026186576, ...
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1answer
50 views

Tick boxes for a qgis plugin written in python

in a python plugin for qgis I want the user to be able to select one or more of several options via tick boxes. I imagine it to look like e.g. Qgis 2.2 tool "Vector" -> "Data Management Tools" -> ...
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1answer
170 views

QGIS 2.2 documentation

I thought I would try to write a plugin for QGIS (some Python code that I hoped I could easily port) I started following http://www.qgisworkshop.org/html/workshop/plugins_tutorial.html but that turned ...
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1answer
167 views

How to create a slope map with different colors according to slope percentage or degrees

I have converted a dxf file with contour lines into a polyline shapefile, and I have used the Raster Analysis plugin to create a grayscale slope map from this shapefile. I would now like to have ...
5
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1answer
176 views

How to change OpenStreetMap Layer Properties in QGIS 2.0

I have loaded the OpenStreetMap layer in QGIS 2.0, but would like to edit the properties in order to better complement the map I'm producing. I can't seem to find the OSM toolbar or OSM Feature widget ...
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1answer
300 views

Snap points to line and calculate chainage using Open source GIS

I have a line layer (representing a pipeline) and a points layer (representing valves) and I would like to calculate the chainage of the valves along the pipeline. I assume that I would first need ...
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66 views

r.shaded.relief plugin on a DEM layer

I loaded a raster digital elevation map from the DEM explorer website. I defined the projection and created a mapset. I then loaded the raster file into GRASS with the r.in.gdal plugin to create a DEM ...
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1answer
63 views

how to compile qgis-1.8.0 on ubuntu

i have downloaded qgis-1.8.0.tar.bz2 and I want to install it on my linux computer(12.04 LTS). How can I perform it please? I do it because I am desperate with Qgis 2.0.1 Dufour on ubuntu 12.04, ...
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1answer
71 views

QGIS 2.0 Raster Interpolation

I am trying to use the Rasterinterpolation plugin to pick up elevations from a Raster DEM for a series of vector points. Once loaded, the Plugin is accessible through Plugins Menu/ Raster ...
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1answer
137 views

QGIS QgsPluginLayer broken on 2.0.1?

Is there a generic issue with the QgsPluginLayer class in QGIS 2.0.1? When I take the basic Watermark sample from here: https://github.com/sourcepole/qgis-watermark-plugin and make a couple of mods ...
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1answer
164 views

Sextante plugin

I'm looking for the sextant plug-in which is supposed to be showing in Plugin Manager under Manage and Install plugins. I currently have 30 plugins installed and enabled in QGIS 2.0 and 121 more ...
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1answer
105 views

Why do features in QGIS drawn on same datum as Google imagery from OpenLayers move? [duplicate]

I have just started using QGIS. I've loaded the "openlayers" plugin and added a google hybrid layer, which is based off the WGS84 datum to my understanding. Now I create a shapefile and add a new line ...
2
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1answer
79 views

QGis draw over simple jpeg image

I'm pretty new to GIS, and since 2 months ago QGIS is a great tool to achieve very simple tasks, such open some shapefiles I find in the web and load that data on my website geoJSON formatted. Now ...
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1answer
295 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 ...
0
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1answer
192 views

Get list of CRS in QGIS by python?

It is possible to get list/dictionary of "Recently used coordinate reference system" from QGIS by python? Or get list of all "Coordinate reference systems of the world" also from QGIS by python.
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2answers
268 views

How to get the file paths of the loaded layers in a QGIS plugin?

I am very new to GIS, QGIS and Python so please bear with me. I am using QGIS 2.0 and I would like to develop a QGIS plugin that would display the raster layers of the main window in order to allow ...
2
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1answer
235 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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1answer
72 views

Halt QGIS on startup

I have a custom made login form in Python, which launches on QGIS startup. But before the user has a chance to enter the credentials, the program starts normally, bypassing the form. From then on the ...
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1answer
235 views

Label features on hover/click with QGIS?

Simple question: Is there a built in/easy way to show labels for features based on a hover or click action with QGIS 2.0.1?
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1answer
101 views

Sextante in QGIS - downloaded, but does not show up

I downloaded Sextante, and I put it into the directory C:\users[my_user_directory].qgis\python\plugins\sextante-1.0.9\sextant I re-started the computer, but there is still no sign of Sextante in ...
0
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1answer
96 views

Changing CRS for basemap from OpenLayers plugin

Relatively new to QGIS here and I haven't been able to find this question answered yet. I'm working on plotting data from NYC (Queens, specifically) and I would like to overlay my heatmap on a basemap ...
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2answers
505 views

How to avoid “Handle bad layers” message when using QGIS Flowmapper plugin?

In QGIS, if I close a project and try to open it a few days later I often get a message that says "Handle bad layers". This is very frustrating because when I open the project various layers will have ...
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2answers
1k views

Make a polygon from intersecting lines in QGIS, using Polygonize or similar?

In QGIS, I want to make polygons from a set of intersecting lines. Looking at the screenshot here, I want chop the purple line (it's a closed line, not a polygon) where it crosses the green and blue ...
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57 views

Zonal statistics returns wrong values in QGIS

I used zonal statistics for a simple task: to transmit raster pixel values to vectormap which contains squares as big as the pixel size is. The problem is that the values of the outcome are not ...