QGIS is a user-friendly, cross-platform GIS application licensed under the GNU General Public License.

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4
votes
7answers
2k views

How to get OS Mastermap data into QGIS?

I have been tasked with getting OS Mastermap topography data into QGIS system to compliment our other map layers. The data comes in .gz format. Which I am told needs to be decompressed before I can do ...
1
vote
1answer
532 views

Openlayers Overview and OpenLayers versions

I have installed OpenLayers and the Openlayers Overview plug-ins but I am not sure if they are working. I can create new 'open' layers from the Openlayers plug-in drop down, but when I try to add a ...
2
votes
1answer
211 views

Vectors created in OTB Monteverdi are displaced

I'm using the Orfeo Toolbox Monteverdi in combination with QGIS in order to produce classified vectors of vegetation cover which I then use in maps in QGIS. (I can't use the QGIS OTB plugin because as ...
2
votes
2answers
676 views

FIeld calculator gives integer not a real as requested

Two fields "population" and "F06_popula" (both integers) were used in calculating a new field pct-diff. I asked that the new field be a decimal with a width of 10 and precision of 3. The result has ...
5
votes
3answers
1k views

Add 3rd party repositories button not in version 1.8.0 Lisboa

The available manuals and other help sources all refer to the 'Add 3rd Party Repositories button' in Plugins>Fetch Python Plugins and then the Repositories Tab. My problem is that the installation of ...
7
votes
1answer
1k views

How to add labels outside of features?

I'm trying to achieve this kind of labeling using QGIS. Apparently, it doesn't seem to be easily supported. Would you have an idea for a workaround ? I managed to have circled text using ...
6
votes
2answers
1k views

What are valid values for “data defined” labeling settings?

I'm using QGIS 1.8. I'd like to customize label features on an existing shapefile using the new label engine and it's "data defined settings" option. I'd like to know what the attribute table field ...
1
vote
0answers
114 views

Is there an equivalent of arcgis' eliminate feature for QGIS?

I already know of grass' v.clean, but I'm looking for something that doesn't involve third party software. Python scripts or addons are good candidates. What is arcgis eliminate : ...
2
votes
0answers
252 views

How to create polygon “stamps” and extend lines by fixed distance? in QGIS

This is related to Does QGIS have these CAD editing functions? Cadtools have solved a lot of the issues I had but I need the ability to see how long a line is while I am drawing an orthoganal ...
3
votes
0answers
339 views

How to offset points along line in QGIS?

I used the "Profile from Line" plugin to create evenly spaced points along a line in QGIS, but I'd like to offset them to either side of the line. I spose I could draw two lines parallel to the ...
4
votes
1answer
782 views

How to find all intersections and count lines arriving at each intersection?

I'm having a hard time getting off the ground with this, and am trying to move away from ArcGIS / arcpy. I have a shapefile with a network of polylines. I want to find/count all 2-way intersections, ...
2
votes
1answer
429 views

How to implement signals on add or modify feature?

I've created a test plug-in in QGIS successfully, but have had a hard time implementing a signal on a vector layer event (add or modify feature). I've add this to my initGUI method: ...
6
votes
1answer
227 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
25 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 ...
1
vote
2answers
292 views

QGIS GPS position after entering attributes

I would like to be able to fill a form and, before, during or after, be able to cath a GPS point. I already know the GPS extension but I have to catch the point and enter attributes after... Idea how ...
2
votes
2answers
778 views

How do I use ranges for raster colour map in QGIS

I have a raster layer in GeoTIFF format, with continuous data values between -1 and +1. For the colour map, I would like... >0 to be green = 0 to be grey <0 to -0.25 to be pink <-0.25 to ...
1
vote
0answers
59 views

QGIS scalebar shows a wrong scale [duplicate]

Possible Duplicate: Why does QGIS scalebar show a wrong scale? I want the scale-bar in QGIS to be in meters/kilometers. Usually it's in degrees, but if I change it to meters it is displayed ...
3
votes
1answer
410 views

select polyline intersections from one shapefile using QGIS

I'd like to find out if there is a way to select all of the polyline intersections within one shapefile. The lines are a road network. I've looked through the posts, and the only tip I can find is the ...
5
votes
4answers
3k views

Dissolve ploygons in QGIS or Grass to new polygons of defined population sizes

I have a shapefile with 3800 polygons representing the smallest administrative areas in Ireland. Many of these, in rural areas, have tiny populations, under 100 people. In urban areas, all would have ...
3
votes
3answers
4k 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 ...
0
votes
1answer
110 views

MMQGIS converts very large text numbers to a numerical missing value

I used MMQGIS plugin to change a table of numbers in text format (UN world economic data) which had large values of items like GDP 132000000000 (132 billion) were all converted to -2147483648 which I ...
0
votes
0answers
414 views

can't add JPG files into QGIS?

I can't add JPG files into QuantumGIS. I get an error message "C:\Spatial_Days\Data\Working\AP_Coast_Export.jpg is not a supported raster data source". I am using QGIS 1.7.4 Wroclaw with GDAL 1.8.1 ...
1
vote
1answer
269 views

Help needed for georeferencing in QGIS

I am new to Quantum GIS. I just happened to browse to a tutorial on georeferencing in QGIS and I found it easy and interesting. I also calibrated the map and saved the points as per WSG84 standard. ...
1
vote
1answer
232 views

in QGIS, while using simplify feature, slider does not appear

Using Qgis both 1.8.0 and 1.7.4, the slider does not show up after selecting features and click "simplify feature" botton. Any special setting needed to show the slider? Thanks.
4
votes
2answers
282 views

How can I associate one point layer to one line layer?

How can I associate in QGIS one point layer to one line layer A sample scenario could be this one: A point layer "Valves" and line layer "Pipelines" Each layer should have its own set of attributes ...
1
vote
1answer
296 views

installing module in embeded python in qgis

I'm newbie to Quantum GIS and Python. I'm using QGIS in windows platform. How I can install module for python embedded in QGIS? Also, how can I run embedded python from windows directly? Thanks
2
votes
2answers
681 views

PostGIS/QGIS and granting permissions

I've got a PostGIS databases, with lots of schemas. I can easily create a new user that will allow them to update and delete features. However when I get the user to create a new feature I get the ...
2
votes
1answer
178 views

How to avoid colliding parallel lines in QGIS Composer

I am preparing a map which is concerned with showing two line features and there relative location to each other. The line features are 20 m apart and at a scale of 1:50 000 or bigger on A3 I want to ...
2
votes
0answers
42 views

How to create a link on a marked item?

I'm working with ArcGIS 10.x and QGIS 1.74 on a Windows XP SP3 System. In ArcGIS I get XML-Data which can be converted to a file-gdb using "IP NAS-Manager". Included in the XML-files there a owner ...
2
votes
2answers
1k views

Looking for a colormap for SRTM like OCM Landscape

In Quantum GIS there's an OpenLayers plugin. I would very much like to use the same colormap/scheme/theme used in the OCM Landscape layer and apply it to SRTM image I have. I checked the the open ...
3
votes
1answer
202 views

Projecting GCP points into translated file

I have file A.png and file B.png. I translate file A.png so i could translate it into B.png (creating multilayer file). Is there any easy way to get new GCP points coordinates so i could combine those ...
2
votes
3answers
884 views

An error has occured while executing Python code while doing home range analysis (Qgis 1.8.0)

It keeps appearing: Traceback (most recent call last): File "C:/Users/Worten/.qgis//python/plugins\HomeRange_plugin\HRplugin_dialog.py", line 80, in QObject.connect(self.buttonBox, ...
1
vote
1answer
246 views

ReportLab integration into QGIS returns error message “no module named reportlab”

I want to use ReportLab in my own plugin which I have written for QGIS. I have installed ReportLab for the python versions 2.4, 2.5 and 2.6. The package is respectively installed into the ...
2
votes
2answers
357 views

Using osgeo modules in ArcGIS10.1 and QGIS 1.8 python shells

This is related to an old question of mine - Issues with osgeo - qgis.core and arcpy modules Now in new versions of all the software QGIS Lisboa (1.8), ArcGIS 10.1 and pyScripter 2.5.3. They all use ...
3
votes
2answers
345 views

How to display DMS in QGIS print composer?

Can we display degrees, minutes, seconds in QGIS Print Composer window instead of decimal degrees? Is there any plugins available for that? Thank you very much.
4
votes
1answer
499 views

How to customize legend icons in QGIS?

Under layers in QGIS shapefile polygon layers always seem to be denoted by right angled polygons which translates to the map legend in Composer. Is there any way to change the outline to a more ...
2
votes
0answers
459 views

cant find point/polygon intersect using qgis (windows only)

below i describe the method i am using. i have 2 machines: 1 ubuntu linux, qgis 1.4 - intersection works 2 WIN xp, qgis 1.8 - intersection dows not work hopefully, someone will ...
10
votes
1answer
450 views

Is there a way to add a “current user” label to the print composer?

Is there a way to add a current user label to the print composer in QGIS. I thought there might be something similar to the $CURRENT_DATE format available. This would be in a windows environment.
3
votes
0answers
268 views

MapServer WMS feed and QGIS

I've managed to create a WMS feed from Mapserver showing a tileindex to some rasters and a shapefile and it appears in my browser OK. If I go to QGIS (1.8.0 Windows StandAlone) and I connect to my WMS ...
2
votes
1answer
314 views

Delaunay triangulation doesn't work

I am trying to create a Delaunay triangulation of a set of 3692 points with QGIS 1.8.0. The resulting set of polygons appears unfinished, leaving a small part of the original map uncovered by ...
0
votes
0answers
36 views

QGis Smooth Raster DEM [duplicate]

Possible Duplicate: Raster generalization - buffers in rasters, expand pixels? I have a 1m LIDAR DEM which I'm manipulating in QGIS. I'd like to smooth the DEM, such as by having each ...
0
votes
0answers
334 views

Why is a Shape polygon file not editable?

I received a .shp polygon file. When I choose the edit toggle tool in QGIS the little red X's appear as expected. Then when I try to edit the polygons such as add a polygon all seems to go well, when ...
2
votes
4answers
3k views

How can I fix QGIS 1.8 startup issues due to missing qwt5.dll library?

I installed the QGIS 1.8 a couple of weeks ago and it run ok. Today the qwt5.dll library is missing apparently. I deinstalled and also deinstalled the microsoft visual c++ 2005 distributables to do a ...
2
votes
1answer
516 views

Couldn't load SIP Module

After reinstalling QGIS, the desktop program runs but generates the python error "Couldn't load SIP Module Pythin support will be disabled" Because of this error, no plug-ins will load. I found a ...
1
vote
1answer
256 views

Dxf drawings displaying as points but i need lines

I have an autocad dwg. which i then saved as a dxf. I have way to many layers in it such as contours, buildings etc. All I need is the red and blue lines. I cannot delete the other lines as they ...
1
vote
1answer
156 views

Looking for a template project for OSM data

I have a PostGIS 2 database filled with OSM data for my country via Osmosis. Is there perhaps a template/project (!styling) for QGIS i could download, where i would simply change the provider of data ...
0
votes
1answer
332 views

Vector boundary generation -similar to Image Boundary

I want to automate the creation of boundary polygons from vector files. This is not footprint or extent creation (I already have scripts to do this). I want to create a tool similar to the QGIS, Image ...
1
vote
1answer
582 views

Write spatial operations to PostGIS from QGIS or ArcGIS

I need to write my spatial operations to a (new) postgis layer (as the data is to large for a shp file). Can this be done in the QGIS browser or from ArcGIS without SDE? When you go (for example) --> ...
5
votes
2answers
3k views

How can I uninstall Quantum GIS that was installed using OSGeo?

I installed QGIS using OSGEO4W, and would love to know how to uninstall it, because when I go to "Control Panel > Programs > Uninstall" the program does not appear in the list of installed programs. ...
2
votes
2answers
2k views

How to install OpenLayers plugin in QGIS1.8

I am using QGIS 1.8.0 on Windows 7 (32-bit) but am unable to install the OpenLayers plugin. The Python plugins menu does not include OpenLayers on the plugin list. Can it be somehow added manually? ...