Software plugins that add functionality to the QGIS package
2
votes
1answer
91 views
plugin 'hook' when writing with Python
Just a conceptual question... when writing a plugin using Plugin Builder 1.8.3, where does the script get connected to the application instance objects?
As an example (taken from ...
1
vote
1answer
92 views
Is there a straight way to copy or clone a QgsVectorLayer Object?
Is there a straight way to clone or "deepcopy" a QgsVectorLayer Object with python? Unfortunately the python module "copy" is not successfull with that.
Thanks in advance!
nikolaus
3
votes
1answer
177 views
Where is the Road Graph panel?
I am trying to use the road graph plugin within qgis 1.8 (running under windows 7 64 bit). when I click vector-> road graph -> settings I get the settings-panel:
But, I dont know how to enable the ...
0
votes
0answers
33 views
QGIS Plugin delete QGSVertex from map canvas
i'm developing a qgis plugin and i need to add a function to delete previous drawn vertexes on map canvas.
On my dialog class, i can draw vertexes and when i draw one i'm also adding it to a list, so ...
2
votes
1answer
224 views
How to meet “Contour plugin” and “Profile Tool” dependencies in OSX?
So I have two similar but different issues than my previous question, one I may have mentioned already. When attempting to install the Contour plugin I am told I need matplotlib, which I have on my ...
1
vote
1answer
146 views
QGIS Profile from Line tool requiring shapely.wkd?
I am trying to install the Profile from Line tool for QGIS, and the system informed me I need shapely.wkd. A search on the QGIS site for shapely takes me to the Contour Plugin...can anyone help me out ...
2
votes
1answer
220 views
QGIS GDALtools plugin problem
I am trying to use the GDAL merge tool and receive the following error message:
The process failed to start. Either the invoked program is missing, or
you may have insufficient permissions to ...
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:
...
4
votes
2answers
112 views
What is the fastest way to iterate through a list of features?
I have written a QGIS plugin and it iterates through all features in a layer using provider.select() and compares geometry. The problem, the plugin is very slow. If there are 114 features in a ...
4
votes
1answer
62 views
Is it possible show the feature attributes dialog when I add a feature in code?
I want to know if it is possible to make the feature attributes dialog in Qgis show up when I add a feature by code using:
QgsVectorLayer::addFeature( tFeature )
This is available when I add ...
1
vote
0answers
278 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
3
votes
1answer
61 views
How to use the QgsDiagramRendererV2?
I'm writing a plugin for QGIS in python
in the QGIS API doc, I can see the QgsDiagramRendererV2 class, under the qgs.core section
http://www.qgis.org/api/classQgsDiagramRendererV2.html
What I'm ...
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 ...
7
votes
2answers
198 views
How to run a spatial query with a raster and vector layer in QGIS?
I have a soil map (vector-polygon layer) and a map of the crops farmed in the same area (raster layer, from the US Cropland Data Layer).
I would like to calculate for a given soil type, the surface ...
3
votes
1answer
124 views
How to get raster layer pixels contained in a shape defined in a vector layer
I am new in QGis python plugins dev and I have a "maybe stupid" question (in the title :-) ).
I try to retrieve pixels (from a raster layer) which are "contained" in a polygon defined in a vector ...
2
votes
1answer
91 views
Qspatialite plugin problems with queries using inner join
I'm trying to create a layer in QGIS from a sqlite database using a query from 2 tables: one has spatial data and the other doesn't.
When I build the query using Qspatialite using the 'Advance SQL ...
0
votes
0answers
68 views
How to debug problems with Terrain profile plugin?
I am trying to use the terrian profile plugin to create a profile of a lake but at the moment i am just trying to get it to work with a DEM I have.
However I am only getting outputs that make no ...
3
votes
2answers
843 views
How to reproject a vector layer in QGIS?
I have some shape file which is in UTM. I wanted them to convert to Decimal Degreesin QGIS.
Hope I can get some better response..
Thanks.
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,
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 ...
0
votes
0answers
34 views
Plugin “QSpatialLite”
I often have the problem that I can’t install the plugin "QSpatialLite" or after an update it simply does’nt work ... Does anyone have an idea how I bring it to work or alternatively someone knows a ...
3
votes
1answer
178 views
How to use QGIS Photo import plugin?
I have a lot of Photos with lat, long, and altitude information.
When I start the import, I get an error message.
Do I need to prepare a blank point layer before importing?
Is there another python ...
1
vote
1answer
102 views
QGIS python plugin, segmentation fault, what can I do?
I'm trying to write a python plugin to create an input file for an urban climate model out of three shape files. Unfortunatelly QGIS closes when I try to load the plugin. When I start QGIS from the ...
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 ...
7
votes
2answers
1k views
How to check Topology in QGIS?
I have two Shapefiles with Polygons ( City and Forerst)
Is there a Plugin who is able check the topology (QGIS)? Like "Knots do not overlap" or something like that? I dont want that they overlap.
...
2
votes
1answer
520 views
What's the proper format for WKT linestrings when importing into QGIS?
I'm trying to run the following test CSV through the Delimited Text plugin as WKT data:
oid,Line
1,LINESTRING((45.554194 -122.686101, 45.433001 -122.762632))
2,LINESTRING((45.432505 -122.598327, ...
1
vote
1answer
133 views
Is there a way of viewing a photo has a point tag from Photo2shape in QGIS?
Is there a way to view images (photos) that have location point from Photo2shape by clicking on the point in QGIS?
0
votes
1answer
199 views
Polygonizer plugin halts in Windows
I've had some success and some problems using the Polygonizer plugin in the past. I'm using Polygonizer 2.1 in QGIS 1.8 on Windows 7. I'm aware there are sometimes problems using Polygonizer in ...
1
vote
1answer
467 views
How to save a vector layer from QGIS to Sql Server 2008 or 2012?
using QGIS, i've loaded up some administrative boundary data of New Zealand. I wish to now import this vector data from QGIS into my Sql Server 2012.
Is there any way to do this with QGIS ...
5
votes
1answer
337 views
Where can I find documentation on QGIS C++ Plugin Development?
Is external C++ plug-in support available for QGIS?
I'm having a really hard time getting started here. I followed the doc here: ...
4
votes
1answer
178 views
How to Create a raster layer from a numpy array using pyqgis?
I am working on a plugin for Qgis to calculate spatial Kernel density maps. I have all the calculations working, all I am missing is a way to turn a Numpy Array, with density values into a multiband ...
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 ...
0
votes
1answer
205 views
Problem in Spatialite database creation
When I try create a new DataBase, Spatialite plugin return the dialog error box:
The SQL query seems to be invalid. no suck table: views_goemetry_columns
When I click in OK button, a second dialog ...
2
votes
2answers
80 views
Invalid Username When Developing a QGIS Plugin on Mac
On a fresh Mac OSX 10.8 install, I've installed Quantum GIS from Kingchaos binaries and it's running fine. I'm trying to develop a plugin for QGIS using Plugin Builder. The skel that Plugin Builder ...
4
votes
1answer
253 views
Is there a purge function to remove layers from a qgs file which are not present in the Layers pane?
I have some QGIS projects that I've been using for long time, adding and removing layers, updating reference to deleted or moved files etc.
Opening with a text editor the qgs file I see that it ...
2
votes
1answer
412 views
QGIS: How to load feature (.qml) styles from python? [duplicate]
Possible Duplicate:
How to style a layer from console?
I'm trying to set the styles for a vector layer by loading the .qml file in the python console. The qml-style file contains all ...
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 ...
3
votes
1answer
160 views
What is status of OpenSceneGraph (OSG) plugin for QGIS? [closed]
Does anyone know if the OSG plugin for QGIS is working?
If so does anyone knows what the future plans is for OSG plugin in QGIS?
I am using QGIS version 1.8.0-Lisboa.
I keep getting the following ...
2
votes
1answer
383 views
How to enable GRASS plugin in QGIS 1.8.0 (Linux Mint 13 - 64 bit)?
Every time I enable GRASS plugin in QGIS (Plugins -> Manage Plugins -> GRASS), I got a message: Exception - G_getenv(): Variable GISDBASE not set.
I googled and found some information here but don't ...
2
votes
1answer
227 views
Are features of new labelling tool available to control via Python API?
I am writing a plugin using Python and currently using methods that set the label similar to those seen under Layer Properties. Some of the features under the new labelling engine available on the ...
1
vote
1answer
101 views
It is possible to add A* to the pgrouting plug-in?
I am using pgrouting layer plug-in as described in this post:
http://underdark.wordpress.com/2011/12/18/osm2po-part-2-pgrouting-on-osm-the-easy-way/
I am now able to calculate the shortest path using ...
9
votes
2answers
711 views
Is there a way to use “Select by Attribute” in QGIS using a python command?
is there a way to use the function "Select by Attribute" in QGIS using a python command? In my plugin the user should enter a value via a GUI and this value should be used in a function which selects ...
0
votes
0answers
29 views
How to apply a symbology stored in a qml file? [duplicate]
Possible Duplicate:
How to style a layer from console?
I'm writing a plugin for QGIS and I want to apply a symbology (rules) stored in a QML file.
And I don't know how to do that :-/
...
0
votes
0answers
172 views
Python error when using Measuring Vegetation plugin
I am trying to use the Measuring Vegetation plugin and I am getting this error from Python:
Traceback (most recent call last):
File "C:/Users/NUR/.qgis//python/plugins\mv_plugin\mv_plugin.py", line ...
0
votes
0answers
82 views
How can i apply stretch to MinMax to the channels of image using GDAL
in Qgis i set Min/Max values of rasterband, to apply the chnage to the image channels i developpe this code in c++ but no thing has changed in image:
GDALDataset *ptRasterDataSet;
ptRasterDataSet = ( ...
1
vote
3answers
457 views
Qgis: How to display special characters German “ÄÜÖß” in a Map?
I have a shape file with names for Regions. These don't seem to contain special characters but ugly hyroglyphes. What can I do do display them correctly. If I import the shape as UTF-8 it doesn't ...
2
votes
1answer
172 views
Is there an itemSelectionChanged Signal in Attribute Table?
The QgsVectorLayer class emits a selectionChanged() signal . If a QGIS user for example selects a record in the Attribute Table of a Vector Layer - a selectionChanged() signal is emitted an can be ...
5
votes
1answer
154 views
Simulate (Mock) GPS Tracks
I have the following scenario:
1) I need to create GPX files for use in testing of a mobile device.
2) The tracks to be described within will span large distances over long time periods (i.e. it's ...
0
votes
0answers
21 views
add 3rd party repositories [duplicate]
Possible Duplicate:
How to install OpenLayers plugin in QGIS1.8
"add 3rd party repositories" is missing from v 1.8 QGIS plugin installer. I would like to access the Openlayers plugin which ...
3
votes
3answers
2k views
How to install Python libs for XYtools to read Excel files
I need to use the XYtools plugin to read an Excel file. After choosing the XYtools incon and indicating an Excel file to read in, a message appears "there is a problem with loading a python module ...
