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

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3
votes
1answer
1k views

How to label vector features programmatically?

I am using python for QGIS 2.0.1 and I have a vector layer of points representing the positions of state labels. I want to display the 'state abbreviation' attribute on the corresponding point for ...
3
votes
1answer
774 views

NOAA Nautical Charts .bsb format

Is it possible to load a nautical chart from NOAA into QGIS that has the .bsb format? Didn't have much luck with mrSID format. using QGIS(dev) on ubuntu 13.04
3
votes
1answer
87 views

How to combine several datapoints in one location to a single point varying in size accordingly?

This might be a very simple thing, but I just can't figure it out how to do it in QGIS (alternatively I'm also grateful for explanations for ArcGIS). I have a fisheries dataset with multiple catches ...
3
votes
3answers
1k views

How to select features with NULL Geometry from Shapefiles?

I have been given a Shapefile that contains records with NULL geometry, along with records with non-NULL geometry. This situation appears to cause problems in QGIS (1.8 and 2.0) when editing the ...
3
votes
2answers
860 views

Access all plugin from QGIS Modeler (Sextante)

I read that it is not possible to access to all of the installed QGIS plugins from the Graphical Modeler (QGIS 2.0.1). It would be great, in defining the model in the Graphical Modeler, if the user ...
3
votes
1answer
756 views

KML in QGis with additional Data [closed]

i´ve developed a android app that extracts the exif-information of a photo and creates a KML-file (Placemark) - some additional information like camera-type, focal length,... are stored in the tag ...
3
votes
2answers
1k views

QGIS 2.0 Plugins missing [duplicate]

At the risk of a series of downvotes but I have just installed QGIS 2.0 after using 1.7.4 and 1.8 previous. It looks great but there are a lot of plugins missing. I understand from the install that ...
3
votes
1answer
579 views

How to change the color of a selected feature with pyQGIS?

is it possible to change the color of a selected feature in qgis 1.8? To highlight a feature I use: vlayer.setSelectedFeatures(selectedList) box = vlayer.boundingBoxOfSelected() ...
3
votes
1answer
468 views

Field Value Mapping QGIS

I am wondering if there is a way to do field value maps that are filtered based on another attribute field? I know how to associate value maps, but not that are connected to another field. I have ...
3
votes
0answers
327 views

When will QGIS version 2 be available? [closed]

Just wondering, how close is the public release of version 2? I do realise that I can download 1.9, but was wondering about the public version.
3
votes
1answer
6k views

How to resize shapefile features proportionally in QGIS?

In Quantum GIS (1.8.0-Lisboa) on Windows (OSGeo4W Install), how exactly would you resize a feature proportionally. The only way I've found to do this is by hand using either the Freehand Editing ...
3
votes
1answer
491 views

Problems printing OpenLayers Pluggin Maps To Scale [duplicate]

It the print composer I can print all maps to scale and satisfactory. However, when I add the OpenLayer, usually Bing Aerial, to the project I cannot print it out to scale. I click the scale box, ...
3
votes
1answer
98 views

What is displayed when I am using a geographic CRS for my project

I understand that each geographical dataset has a CRS, and that in order to overlay them, you need to either make sure that all datasets use the same CRS, or re-project some of them (or use on-the-fly ...
3
votes
1answer
81 views

How to always see all band values with Identify Features of QGIS?

Does anyone know if it is possible to get the Identify Features tool in QGIS to show the band values for all the layers shown in the results window? To clarify, whilst I have several bands "showing" ...
3
votes
2answers
496 views

QGIS Field Calculator Results Removed When Saving Edits

Mac OSX 10.6.8 QGIS 1.8.0 : Using the field calculator from the attribute table, the $area of each feature is shown nicely in the table until I try to save it, then all the values are replaced by NULL ...
3
votes
2answers
951 views

Where is QGIS installation path in Ubuntu

I can't find the QGIS installation path in ubuntu 12.10
3
votes
3answers
593 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 ...
3
votes
3answers
229 views

How can I draw squares in PostGIS layers at different angles?

I am trying to draw two squares on a 45-degree angle and then merge them using PostGIS to edit. QGIS can draw squares but only on a perpendicular plane (eg, 0, 90, 180), and I need to be able to draw ...
3
votes
8answers
11k views

How to convert from dgn to shp or dwg files?

I am a frequent recipient of microstation dgn files and don't like it because I don't have software to convert it to autocad. I do have ARCVIEW, but I can't edit the files. I have tried other open ...
3
votes
2answers
589 views

How to set the color of a feature depending on attributes with PyQGIS?

I'm trying to set the color of a vectorlayer feature depending on the feature attributes with PyQGIS. How do you acces the attributes of a vectorlayer feature?
3
votes
2answers
963 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?
3
votes
2answers
4k views

How to fix “The entry point for the procedure sqlite3_open_v2 cannot be found in the dynamic link library sqlite3.dll”

Translation: Hello, I have a problem installing version 1.0.8. The following error message appears: The entry point for the procedure sqlite3_open_v2 cannot be found in the dynamic link library ...
3
votes
1answer
936 views

qgis.core import error

I would want to use the Qgis api for custom desktop application. When I imported the qgis.core module, I get the following error >>> import qgis.core Traceback (most recent call last): ...
3
votes
1answer
10k views

How to add points to a point vector layer - QGIS

I have a point layer with multiple data points in QGIS, but I want to add some extra data points to it and adjust some info that we missed because the ground was wet and we needed to go around it. I ...
3
votes
2answers
6k views

How to export a raster layer for external processing?

Is there a way to export all values from a raster to for example a cvs or other textfile or dbf or xls and later import (changed) values from that file back into the raster? For vector-files this is ...
3
votes
1answer
768 views

Using QGis for an imaginary plane world

I created an own map for my p&p rpg group and now I want to transfer it into QGis. That's easy to make, but I'd like to have an own CRS for that map but don't know how to use the right proj.4 ...
3
votes
2answers
1k views

How to reproject from Michigan Georef to WGS84 in QGIS?

I am trying to reproject a michigan state land shapefile which is the NAD83/ Michigan Oblique Mercator EPSG:3078 to the WPG84 EPSG:4326 projection. However when i try to do this my map gets squished ...
3
votes
2answers
813 views

Overlaying GPX data on rasters in QGIS

I have a series of raster map images that I would like to use in QGIS and overlay some simple GPX routes over the top to produce a custom map image. This is all quite new to me so please bare with ...
2
votes
1answer
45 views

Displaying layer after using QgsGeometryAnalyser?

I have already discovered this class, but I am confused. If I am doing a analysis on the current layer, I don't know why it is not displaying on the map. lyr =iface.mapCanvas() layer = ...
2
votes
1answer
47 views

Using OS data, some sea tiles are the wrong colour

Using OS data and CRS ESPG:27700, Some blocks of sea tiles are showing the wrong blue colour, how do I change these tiles to the correct colour please?
2
votes
2answers
207 views

Running PyQGIS script directly (without using interface)?

I wrote the following script, which runs fine from the QGIS python console (it loads two shapefiles, intersects them, and then finds the areas of the new regions): import qgis.utils import qgis.core ...
2
votes
0answers
31 views

Unable to change band rendering style of rasters in QGIS 2.10.1 [duplicate]

Apologies, I am new to QGIS and there may exist a simple solution. I have multiple DEM raster files (.tif) added to my map. However, I am unable to alter any of the style options under the "Band ...
2
votes
1answer
60 views

Merging more than 9 input files with lasmerge?

Is there a possibility to feed more than 9 LAS files to lasmerge tool? The user interface only allows 9 LAS files from LAStools toolboxes in QGIS or ArcGIS, but at liblas.org it’s described as there ...
2
votes
1answer
126 views

Problem with Distance Matrix in Qgis 2.83

I want to calculate the distance of archaeological sites to the nearest river. Following this question Calculating the minimum distance between points and polygons in QGIS I extracted the nodes of ...
2
votes
1answer
74 views

pyqgis traversing subgroups and group layers

I am trying to find the name of subgroups using pyqgis. I have been trying to use Playing with subgroups I am however unable to traverse and get the names of the subgroup. I have tried the code on ...
2
votes
1answer
104 views

Create points symbology with more than one parameter

In QGIS i would like to create symbology for points layer where the symbology will take into account more than one parameter (currently two). i.e.: My points layer has street names and house numbers ...
2
votes
0answers
78 views

QGIS does not display all Features of Layer and behaves weird instead

I have a weird problem with QGIS trying to load a Layer from a Postgis Database When I open the Layer from Postsgis I have two choices: Method one: Either, I use the Panel "Browser", where I can ...
2
votes
2answers
142 views

Getting currentfeature's color in Expression Builder of QGIS?

In QGIS Expression builder. I want to obtain the color code of the current feature. I mean: My layer contains lines, each one is painted with a different color. Now I want to assign that color to ...
2
votes
1answer
153 views

How to get mean geographic direction of a polygon in QGIS?

I have a raster height model and would like to calculate the horizontal geographic direction (north, east, etc. - orientation) of each cell, then calculate then the mean value of all these cells in ...
2
votes
2answers
203 views

How to display multiple attributes in a QGIS Composer legend?

I have a polygon layer which has a number attribute and a text attribute. When I make a legend in the composer, it automatically chooses the number to display while I would like to have both the ...
2
votes
2answers
189 views

Making an overview with linked detailed maps in QGIS 2.8?

i want to create 4-5 detailed maps, and then an overview map that has rectangles that markes the locations of the detailed maps. Best case would be if the rectangles were links to the detailed map. ...
2
votes
2answers
186 views

How do I count the matching 'many' entries in a one-to-many relationship?

I have a simple SHP line file - where each line has a unique reference. I have a related text csv file using the same reference, in a one-to-many situation. I need a map with the lines (in the 'one' ...
2
votes
1answer
114 views

Merge multiple bus stops with same name

my question is similar to this one, but it's not answered sufficiently: How to merge points (bus stops) in QGIS manually or programmatically? I have OSM-transit data with bus stops. Some stops have ...
2
votes
1answer
714 views

QGIS Python script for creating project file

Is there a way to create QGIS project file(.qgs) using only Python script outside QGIS Python console.I am trying to publish a map using QGIS Web Client using python. For this, I am trying to do below ...
2
votes
1answer
965 views

how to generate NDVI with multi channel images?

I have a 6 channel proprietary camera and I need to create a NDVI map. I created a map from each band, so now I have 6 files each one on a different band width. How can I proceed now? I am using QGIS ...
2
votes
1answer
94 views

QGIS Print Composer - Display Symbols for Empty Classes?

I am working on a map of mortality rates for several racial/ethnic groups and I have created custom classes to encompass the rates instead of the QGIS classes created through its various modes. This ...
2
votes
2answers
140 views

QGIS - Edit UI - Python Init function localization with QTranslator

I have interaction with layer defined by custom designed UIs. In layer properties the following settings: Edit UI - customline.ui and Python Init function: customline_set.py. #coding: utf8 from ...
2
votes
1answer
656 views

Delete duplicate geometry in postgis tables

After - I dont know what happend - all my entry's in my postgis tables are doubled! I tryed that to delete them but it does not delete any/all duplicates: DELETE FROM planet_osm_point WHERE ...
2
votes
1answer
842 views

How to develop c++ standalone QGIS C++ Application

I want to integrate QGIS in QT\C++ application. I try to write basic C++ apllication to render map and build it using MSVC 2010. class PostGisViewer: public QMainWindow { public: PostGisViewer(): ...
2
votes
2answers
190 views

“Phantom” features showing up in QGIS 2.4

I tried searching for this, but am unsure exactly what my problem is. I am using QGIS 2.4 on Windows 8.1. I have a project in which I have been digitizing from OpenMaps. Last night I was doing some ...