Software plugins that add functionality to the QGIS package

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2answers
1k views

Digitizing from OpenLayers Plugin in QGIS, or create raster?

Is there an easy method for digitizing from a layer added from the OpenLayers pluggin. As i cannot snap to it or use it as raster so the entire map does not load? two separate issues there.
1
vote
1answer
59 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 ...
0
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1answer
126 views

Alternate option for a Data Player plugin for GPS in qgis

I found a plugin for QGIS to play a GPS Track. (Data player plugin).The Problem is I can not read .gpx File with this plugin. Is there another option?
5
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1answer
656 views

CAD Like functions in QGIS

Is it possible for a script to be built that will use a reference point and have it draw several polygons based on distance and bearing, then assess the terrain under the polygon for highest obstacles ...
2
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0answers
116 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 ...
1
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1answer
149 views

Raster menu does not have any tools in QGIS

in raster menu in QGIS, only raster calculator is available, how to get other tools, like wrap (reproject) please see the image for help. help me to get this.
6
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1answer
530 views

QGis Making Column Value of Attribute table unique

For a shapefile, I have a field named id with the following contents in it: 1 1 2 2 I want to make these values unique such as: 1 2 3 4 Is there any way to achieve this in Quantum GIS (using any ...
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2answers
233 views

Making Multipart Features to Unique features

I have a layer with two lines crossing over each other. I create intersection point over them and then create a buffer for a specified distance and then using difference tool, I delete the buffer ...
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0answers
133 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
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1answer
442 views

Why do I get 'KeyError: 0' when using Line Intersection tool?

I'm using Quantum GIS version 1.8.0-Lisboa and trying to create intersection point using Intersection tool. (Vector -> Analysis tools -> Line Intersections ) But when I do that for my shapefile, It ...
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2answers
745 views

Python module “shapely.wkb” missing

I am trying to follow a tutorial from here http://qgistips.spatialthoughts.com/2012/12/find-neighbor-polygons-in-layer-in-qgis.html#more I have downloaded the relevant python script and edited it as ...
1
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1answer
108 views

Should a GDAL Plugin be the same version as GDAL aready built into QGIS

Should a GDAL Plugin be the same version as the GDAL that's aready built into the QGIS version installed? Or,can another different version of GDAL be built and it installed as a Plugin for QGIS, ...
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0answers
65 views

Programatically reorder layers in qgis? [duplicate]

Possible Duplicate: Sort layers in QGIS table of contents? I write a qgis python plugin ,and i try to connect keybord keys to reoder layers in qgis . Are there a method in qgis allows me to ...
4
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2answers
130 views

Creating space at intersection of two links

I have a shapefile consisting of two links which are crossing over each other. I want to create an empty space at the point of intersection of the two links. As of now, I have been manually doing ...
4
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1answer
62 views

How to deliver an additional Python Library with own Plugin?

For my own plugin I need a special library (pyexiv2) to write a comment into a jpg file (PIL does not do that). When I want to share my plugin in one of the repositories in the future, what would be a ...
1
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1answer
206 views

Why won't QGIS let me write to a file?

I am writing a QGIS Python Plugin. I am trying to write data to a file using with open("filename.txt", "w") as f: f.write("file text.") QMessageBox.information(None, "Test", "Written to file.") ...
4
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3answers
2k views

How to install QGIS 1.8 plugin Georeferencer?

My question is about qgis 1.8 georeferencer plugin. I installed the new version qgis 1.8 but I don't have the georeferencer plugins, how do I install it? I used the georeferencing plugin with QGIS 1.6 ...
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1answer
76 views

QSpatiaLite query syntax

Using the QSpatiaLite plugin in QGIS I composed the following query SELECT 'AddressPoint_2'.'buildingNu', 'AddressPoint_2'.'postCode' WHERE 'AddressPoint_2'.'postCode' = 'NR13 3AA' FROM ...
7
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3answers
559 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
120 views

Python error when running SpatiaLite with OSGB(27700)

I have a project open in QGIS and am trying to import an Ordnance Survey Address Point layer into SpatiaLite. I have recently installed the Qspatialite plugin. I open SpatiaLite in the DB Manager ...
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0answers
24 views

postgis: no module named psycopg2 [duplicate]

Possible Duplicate: psycopg2 error with QGIS 1.5 When I open DB Manager in QGIS I get what appears to be an error message at the bottom of the window:- postgis: no module named psycopg2 ...
5
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1answer
167 views

Is it possible to grow QGIS symbol size over time?

I've got a data set of people movements within my municipality. (between points of places) I've managed it with the plugin for QGIS 'time manager'. Over time people come and go, and based on a count ...
8
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1answer
5k views

How do I maintain a resposive GUI using QThread with PyQGIS

I have been developing some batch processing tools as python plugins for QGIS 1.8. I have found that while my tools are running the GUI becomes non-responsive. The general wisdom is that the work ...
8
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1answer
2k views

Issues Accessing ESRI File Geodatabase within Quantum GIS Desktop

I am trying to access ESRI file gdb from Quantum GIS. I am on Windows 7, 64-bit. I have found many useful threads on how to set up this functionality within Quantum GIS. The method I went for is ...
2
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0answers
135 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 ...
3
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2answers
1k views

How to install shapely for python 2.6 (Mac) NOT 2.7?

I'm trying to use Polygonizer plugin inside QGIS, but it needs Shapely to work. I've installed Shapely (pip install Shapely) but that's for python 2.7. QGIS works with python 2.6 (on Snow Leopard) and ...
11
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3answers
4k views

How to programatically check for a mouse click in QGIS

I want to know how to check for a mouse click in QGIS. I am trying to write a python plugin and want to provide functionality similar to the "Select Single Feature" tool that already exists in QGIS. ...
7
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1answer
1k views

How to enable GRASS-modules in QGIS?

I have the latest QuantumGIS-1.9.0-master from Github with python-modules support and full GRASS-integration (GRASS-4.6.3-RC2) on Linux. When opening the GRASS-tools plugin, it only displays six ...
6
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1answer
2k views

How to transform a selected multipart feature into singlepart features while editing in QGIS?

There are several questions and respective answers for how to make a multipart features Layer into a singlepart features one using QGIS: How to break a single polygon into multiple polys? How to ...
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3answers
2k views

Where is the QGIS Parallel Line Plugin?

Somehow I believe to recall there does exist some ind of "draw paralel line" plugin for QGIS. Could anyone please point me to - I cant find it :-/
3
votes
3answers
476 views

How to install the QGIS Statist plugin in Mac OS X?

I'm trying to install the Statist plugin. I'm running MacOSX 10.7.5. with Python 2.7.3. and Numpy 1.5.1. I have also installed matplotlib 1.1.0 (for python 2.7). When I try to install the Statist ...
1
vote
2answers
554 views

count lines in polygons

I found the following link to a post saying that a count lines in polygons had been added to ftools for QGIS: http://hub.qgis.org/issues/4712 However I can't find how to access this feature nor any ...
3
votes
1answer
171 views

Button to add a new line in a non-spatial table without opening the table itself using QGIS?

While using QGIS and having loaded a non spatial table (from PostGIS), is it possible to add a new row to its table attributes without having to open the attribute table first as in here Is it ...
1
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1answer
191 views

Get the keyPress-Event in QGis-Plugin

I have a QTreeWidget in a QWidget which is the gui of my plugin(cpp). Now i want to get the keyPress-Event of a Node in the TreeView. I try to reimplement the signal of the QWidget. protected: ...
0
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1answer
364 views

How to set the cursor to busy mode?

How can I set the cursor to busy-mode/in progress from my qgis plugin (cpp)? I couldn't find anything in the API documentation.
4
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1answer
256 views

Can I add entries to the layerlist context menu?

I am implementing a python based plugin for use with QGIS 1.8. Most of it's user interface is contained within a QDockWidget but there are some layer specific controls I would like to append to the ...
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0answers
136 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= ...
7
votes
2answers
3k views

How to split an irregular polygon into equal areas?

I am a surveyor and use QGIS for maintaining soil test records on civil projects and am constantly provided with test lot area or number of lots required. These are more often than not irregular in ...
1
vote
1answer
163 views

Issues with OSM Plugin in QGIS on Ubuntu 12.04

(not sure how to wrap the subject into a question! But...) Here are some issues I've been having with the OSM plugin: 1) When I bring in the .OSM file, close QGIS, then reopen, I get a "Handle Bad ...
4
votes
1answer
3k views

Importing shapefile in grass

I have very simple shapefile, which consists of couple of polygons, and I wanted to snap boundaries automatically. Unfortunately qgis doesn't have such function, but grass has according this answer: ...
0
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1answer
191 views

FieldPyculator Plugin - How to concatenate fields?

How can i concatenate two fields using pyculator plugin? There is any document with all pyculator functions that i can use in "field expression"?
1
vote
1answer
262 views

GRASS-QGIS Linking error

I need few customizations over grass and would use qgis gui for accessing grass. I am building qgis with grass enabled (WITH_GRASS=TRUE). While I am doing that I get the following. Any help is greatly ...
3
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1answer
705 views

How to hide/show QGisVectorLayer from Python code?

Once created a layer, how can I hide/show it? I can enable/disable rendering of a specific layer by selecting the checkbox through QGIS, but I need to do it programmatically from python code. How can ...
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vote
2answers
2k views

How to fix QGIS PyQGIS package?

I have a broken package that is preventing QGIS from loading python plugins, updating itself, or even un-installing. The main symptom of this problem is the following message that appears when QGIS ...
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0answers
288 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 ...
2
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2answers
657 views

How to create a “Datum-less” projection in QGIS?

I want to use QGIS to do some georeferencing and image registration. On ArcMap10 I can define an "Unknown Projection", basically a default metric grid, and use it as a grid for georeferncing. In QGIS ...
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1answer
343 views

QGIS Python error on OS X while trying to simplify shapefile geometries

I am trying to reduce the file size of the shapefile by simplifying geometry in QGiS on OS X. But I get the following error... An error has occured while executing Python code: Traceback (most ...
5
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1answer
2k views

How to remove a vector QgsVectorLayer from QGis python plugin

I managed to add QgsVectorLayer in QGIS through a python plugin, for example: vl = self.iface.addVectorLayer(uri.uri(), layerName, self.dbConn.getProviderName()) But how can I remove it?
2
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1answer
947 views

How can I fix QGIS PostGIS Manager error 'shp2pgsql' is not recognized?

I have QGIS 1.8.0 installed via OSGeo Installer and work on win 7. All I need is to upload the shapefile to the database via this plugin. Unfortunately I am receiving an error: Something's wrong: ...
2
votes
1answer
237 views

Road graph tool crashes, but works with sample shapefile [closed]

When I try to calculate the distance between two points using the "Road graph" plugin in QGIS (1.8.0-2, on OSX 10.8.2 ML), QGIS just crashes. It does work with the sample shape file from ...