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

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GDAL Installation help in windows

I'm trying to build a GIS application in Django Framework. I completed the GeoDjango installtion (postresql, spatial libraries). I installed OSgeo4W in my C drive. I also setup environment ...
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1answer
35 views

Converting a JOSM indoor map to QGIS

I have created an OpenStreeMap layer of the indoor of a bulding by following this tutorial: https://wiki.openstreetmap.org/wiki/IndoorOSM, since that is only a proposed tagging schema for indoor ...
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23 views

Where can I find AniMove in Qgis2.4

I have sucessfully installed AniMove by activating experimental plugins (yay! thanks gis.stackexchange). But I can't find it in Qgis! Yes I have activated it. Where is it? Is this a common bug? I ...
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26 views

Update OSM data already imported in qGIS

qGIS makes it really straightforward to import data from Open Street Map (there's a good tutorial here). However, despite this process is relatively straightforward, it takes some time to download the ...
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1answer
35 views

How to create WKT file readable by QGIS 2.4.0

I am trying to create a well-known text (wkt) file that can be imported into QGIS ver. 2.4.0 Here's a minimal working example of the geometry I wish to represent. POLYGON((-125 52, -125 21, -98 21, ...
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7 views

Adding (ir?)regular vector points

I run 2.0 qgis. (I am quite the rookie) I would like to add a point layer which is regularly spaced every 5 metres along the x-axis, and regularly spaced every 1m along the y-axis. I cannot seem to ...
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18 views

How to overlay an NOAA nautical map as a layer in QGIS [duplicate]

I am new to QGIS and am doing some work for a friend. He is hoping to overlay an NOAA nautical map as a layer in QGIS. My only real experience is with ArcGIS. He is looking to do something similar ...
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1answer
37 views

QGIS - exercise data

I´m working currently through the QGIS training manual. However, the data for the spatial analysis exercise in chapter 9.4 ...
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17 views

Connecting ArcSDE to Quantum GIS for dummies?

I really have a need to be able to connect to and edit ArcSDE data in Quantum GIS. This question has been asked before and apparently is possible, but the instructions are just not specific enough ...
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24 views

pyQGIS : Way in order to know modifications?

I 'm writing a pyqgis script. I succeed in accessing gis vector data (lists) from my remote server (thanks to urllib) . I succed in displaying geometries and attributs. 1/ Now, i would like manage ...
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20 views

PostGIS query with input from point layer

I have a table of rivers in PostGIS, each river linking to its outflow. I also have a QGIS layer of some selected sources, and would like to select the entire river downwards from each source (i.e. ...
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2answers
51 views

Is it possible to embed a Qgis map with all the information I added, in my website?

I am not a cartographer or geography student. I work in a network organization for developmental policy and I need a good software which enables me to record the cities in which our members work on a ...
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2answers
57 views

Auto populate field as concatenation of other fields

I'm searching for a way to automatically combine several field values entered in the feature edit dialogue, resulting in a new column comprised of the former values. I have, say fields A, B and C ...
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1answer
39 views

How to perform a spatio-temporal query in attribute table? [duplicate]

I am not good at programming, so I would ask for your understanding concerning my question. I have an attribute table that contains five columns which are: (Date, ID, Latitude, Longitude, Rainfall). ...
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23 views

QGIS style save issues

I have a map that I want to do graduated chloropleth maps for each year over 10 years, and I would like to use the same graduations for each year. I know this was asked earlier and therefore I know ...
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1answer
37 views

How do I save as .osm in QGIS?

The directions in http://docs.qgis.org/2.2/en/docs/user_manual/osm/openstreetmap.html#saving-osm-data seem to have been written before the OSM plugin was merged into QGIS proper. I can locate no OSM ...
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58 views

Converting multipart line into single parts using QGIS?

I have a shapefile in which a bunch of the lines are multipart. Sometimes this is due to joining ways that are not quite connected (gap less than a foot of real-world distance) and sometimes the ...
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28 views

UPDATE: QGIS print composer creates a map with gaps for WMS layers

I want to create some maps with qgis, unfortunately i cannot get good exports from print composer. The exported images (i tried many formats) contains gaps, it looks like a tiled wall mosaic with ...
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64 views

QGIS 2.4: plugin changes map tool canvas click behavior from 2.0

I had created a plugin for QGIS 2.0 to add new features more easily. It involves changing extents and updating snapping options along with triggering the default actionAddFeature(). However, I've ...
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1answer
67 views

QGIS - Create buffer in meters

I'm very new to the GIS world, so my problem could be very stupid, but I'm going to try anyway. Objective Given a list of coordinates in longitude/latitude, stored as a .csv file, I want to create a ...
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12 views

QT designer form default text ignored in QGIS when used with sqlite db

I'd like to populate a table with a custom form, for which I'd like some default text to be set when opening the dialog. I have two columns ('Name' and 'Description'), each with text that should be ...
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2answers
57 views

QGIS polygon centriods - How are they created?

I have been using QGIS to analyses spatial data and I created polygon centroids with the vector geometry tools. Now for a report I have to explain how these centroids were created. I have not been ...
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1answer
35 views

Opening Annotated shape files in QGIS

Ie've been given a number of files including some annotated shape files - Basically kilometre post markers and cable identification markers, to go with a polyline shape file. I was hoping that we ...
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1answer
82 views

Python support with QGIS 2.4 on Ubuntu 14.04

I recently updated my Ubuntu system to version 14.04. I added the sources and installed QGIS as per the directions on the QGIS website. Everything looks good, except for I do not have all the ...
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1answer
19 views

Problem loading the contour plugin

I have installed the contour plugin on my kubuntu 13 laptop, but when I am opening qgis (2.0.1) I get the following message: Couldn't load plugin contour due an error when calling its classFactory() ...
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1answer
22 views

How to read Oracle data with PyQGIS? (“identifier is not long” error)

Do you have any idea how load Oracle spatial data to QGIS with using the PyQGIS? Is it possible? I try: uri = QgsDataSourceURI() uri.setConnection("*host*", "1521", "*database*", "*username*", ...
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1answer
20 views

Maintaining times with points2one in QGIS?

I have a problem that might be trivial, but I really cannot find a solution! I have a csv files with several points (x,y). These points represent the position of different animals at different ...
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31 views

Converting Shapefile Elevation field to Height Field

HAve been trying to update the elevation field in my shape file (vector file *.shp) into a height field. Have tried to rasterize the shapefile then deduct the height using Raster Calculator with a ...
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1answer
43 views

QGIS: Expression WHEN property1 = 'FOO' THEN property2 = 'BAR'

Our Foundation is adding additional properties to points. If property1 = FOO , then add property2 = BAR WHEN property1 = 'FOO' THEN property2 = 'BAR' END When I run this the ...
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13 views

v.clean in QGIS Python console

I have tried to use v.clean and v.clean.advanced (by GRASS GIS) within a script in QGIS, and was not able. I followed instructions here:, but was not able to do so. I got message: "No module named ...
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0answers
15 views

QGIS Invalid object name 'geometry_columns' QODBC3:Unable to execute statement

I was using Lisboa 1.8 with SQL Express and tables with geometry. Connections were working with 1.8 and are working with ArcGIS, so I know my tables and geometry are fine. I installed 2.4 Chugiak, ...
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13 views

Why does image resolution decrease when I import an image into the georeferencer?

I'm using QGIS 1.8.0 on Windows 7. Usually the georeferencer functions very well. However, when I try to import a particular aerial photograph (in either .tif or .jpg format) the resolution of the ...
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1answer
27 views

QGIS – Raster Calculator: Using flat (no data) areas of an aspect-raster in the raster calculator

I´m playing around with the Raster tools, following more or less the qgis-tutorial but using my own data. When I calculate the aspect of a DEM, flat areas are (logically) left without data. However, ...
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15 views

Problem with Gpstools Plugin

I installed QGis 2.4 either with the standalone and Osgeo installers on a win7 Pro 64 laptop with 4 gb of RAM and I have the following problem When I invoke GpsTool either by the icon or the vector ...
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1answer
51 views

Why does QGIS add decimals when a csv is saved as a shapefile?

When I save a csv as shapefile the fields with decimals are saved adding decimals, then the new table in some case has new values. Old Table (CSV) ALTURA ELI ALTURA ORT 1.94 39.6 -11.19 ...
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1answer
60 views

Cropping or removing borders (not NoData) from multiple scanned and georeferenced maps (ArcMap or QGIS)

I have several hundred scanned maps in TIFF format, each correctly georeferenced and forming a large grid of images. The problem is that the border for each map is present - a white band, with a black ...
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0answers
34 views

Looking for free tools to automatically generate spatial data catalogue

I've recently inherited a whole bunch of spatial data (mostly shapefiles but some .gdbs) which relate to a bunch of different cities. I'm looking for a way to take an inventory of what data I've got ...
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47 views

Clip or Intersection tool - QGIS giving empty files

I am trying to clip an Ordnance Survey Master Map (OSMM) feature based on a polygon created for the sake of clipping which does not have any attributes, but the output is an empty file. Projection of ...
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1answer
43 views

who to contact about issues with geoserver plugin for qgis

I have a project in QGIS that I am trying to publish using GeoServer via the plugin. When I try and publish a layer I get: global name 'provider' is not defined Traceback (most recent call last): ...
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1answer
17 views

Remove specific simple markers (multiple markers for some US states that are not fully connected)

This is a follow-up of How to create a gradient color expression in data defined properties How can I remove specific centroid simple markers? For example, Florida, Kentucky, and Rhode Island all ...
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2answers
48 views

How to create a gradient color expression in data defined properties

This question is stemming from my other question on data defined attributes: How to create a gradient point on top of a shape file? Anyway, can anyone help me create an expression within the data ...
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1answer
52 views

Print custom feature form using PyQGIS

I am looking for a way to print a custom feature form created in PyQt Designer for QGIS 2.4 using PyQGIS. My goal is to print/save image as the current extent of the map with the selected feature's ...
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1answer
24 views

How to determine bounding box of current qgis 'map canvas extent' from the python console

I've asked a similar question here: How to quickly calculate bounding box coordinates of a selected polygon with qgis ...regarding a quick way to determine the bounding box of a given layer. Is ...
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1answer
22 views

Is there a way to visually clip a layer in QGIS to prevent information from rendering outside the boundary?

In ArcGIS you are able to Clip to Shape, meaning you can use a shapefile to visually clip anything outside if it. This option does not physically clip anything, nor make a new shapefile. For ...
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2answers
29 views

How to create a gradient point on top of a shape file?

I am attempting to create a point that scales in relative size to a particular integer (frequency) and is gradiented to a particular integer value, and then overlay that point onto each specific ...
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1answer
32 views

How to handle “illegal data type (Float64)” error when trying to convert .tif to .bil?

Each time I try to convert (in QGIS 2.2) an elevation model from .tif to .bil format a get this error: ERROR 1: Attempt to create ESRI .hdr labelled dataset with an illegal data type (Float64). ...
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1answer
31 views

Issue using Matplotlib in QGIS

I am developing a QGIS-plugin and for graphing I want to use matplotlib, like many other QGIS -plugins. This worked fine under linux, but under windows with QGIS2.4 I am experiencing problems. I ...
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0answers
14 views

QGIS + python, Attribute index 0 out of bounds [0;0] when adding a feature to a PostGIS layer (view)

I have a plugin which adds features to a particular PostGIS vector layer using the code below feat = QgsFeature() feat.setGeometry(qgsgeometry) layer.dataProvider().addFeatures([feat]) For one user ...
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1answer
63 views

Point cloud LiDAR

I have been trying to grid a point cloud, version1.2, LiDAR datasets which are intended to be used for hydraulic simulation of flood propagation. Already, I have used Arc* to work on the traditional ...
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1answer
39 views

Raster and vector layer in the same CRS don't match

While adding multiple raster and vector layers (and setting them all in CRS WGS84) in QGIS 2.2, they don't seem to overlap. Interestingly enough, only raster files overlap between each other, the same ...