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

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3
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1answer
645 views

Does QGIS feature a tool like ArcGIS Data Driven Pages?

Has QGIS progressed to the point of having a Data Driven Pages type tool set yet? Or perhaps something similar to the old DS MapBook pre arcgis 10?
1
vote
0answers
182 views

How to Export/Print/Save CMYK colored map to SVG, PDF, or PRN/EPS file

I am a beginner using QGIS 2.0.1 on Windows. Following Data-defined Styles in QGIS I fill CMYK values on my map layers, but I cannot Export/Print/Save CMYK to SVG, PDF, or PRN/EPS file. I see only ...
1
vote
1answer
122 views

How to calculate weighted mean coordinates with negative weights in QGIS?

Hi, I'm pretty new to prof. GIS, but have OSM experience. So if I just miss something obvious, please don't punish me :) I have a .CSV file with measurements of wifis along a track. I like to guess ...
0
votes
0answers
26 views

Style Manager Symbols and Ramps Missing in QGIS 2.0 [duplicate]

This is very frustrating. I already posted a question about the missing color ramps in QGIS 2.0. I´ve even installed the development version without success. No color ramps available, and I have to ...
5
votes
2answers
2k views

Standalone applications using QGIS and environment variables

I've tried going through IRC to see if people can help me out with this, but the medium seems a little clumsy for making any answers clear, so I'm going to try this instead. I would like to program a ...
0
votes
1answer
283 views

How to define correctly the Grass region in Qgis

I know that my question could be pretty basic for some of you. I am trying to learn GRASS. I have some raster layers and a vector file in EPSG 32614. Using the grass plugin I defined a new map set, ...
2
votes
1answer
326 views

How to reclassify a raster (tiff) with multiple bands?

i have a raster file containing information about the windspeed average for the year. My purpose is to reclassify the 15 classes based on their rgb-composite. The color is the only information given. ...
6
votes
2answers
721 views

How to extract mountain peak points from a given digital elevation model?

For past couple of days, i m trying to determine how many mountain peaks are visible (line of sight) from a given location using POSTGIS. The data i have is DEM for Swiss and address locations from ...
2
votes
1answer
200 views

How to join USDA SSURGO soil table data to features in QGIS?

I am trying to make a soil map using QGIS. The only problem is that I cannot join table data to features in QGIS. In ArcGIS for Desktop you just open the folder and then join the tabular table ...
3
votes
2answers
496 views

QGIS DB manager Import layer/file tool won't allow me to choose “Append data to table”

I want to append some data to a layer in my PostGIS DB using a shapefile, but when I use the Import layer/file tool in QGIS, it doesn't allow me to choose the append option. Why is this and how do I ...
1
vote
1answer
144 views

Why does georeferencing reduce the image resultion?

I'm trying to use a raster as a base image in my QGIS project. It is a building schematic which is fairly high resolution. Importing this into QGIS, it seems that the only way to re-position an ...
4
votes
1answer
748 views

How to use the Intersects function in the Field Calculator of QGIS?

I would like to have an example on how to use the Intersects function in the Field Calculator of QGIS. Basically, I want to know which feature from a polylines layer intersects a polygons layer and ...
1
vote
0answers
144 views

Why are the colors of my WMS layer messed up in QGIS?

I have a raster image on my computer, and I used it to test some geoserver features. (I'll upload images to show you what the problem looks like) I have the same raster, but transferred by wms. And ...
9
votes
1answer
731 views

Import GRASS and SAGA modules to python script

I'm new at this. I am "building" a python plugin for qgis and I want to import modules from GRASS and SAGA but I don't understand how to do it. The plugin I want to import is Kriging interpolation ...
1
vote
2answers
117 views

SUDS (SOAP) from the Python console in QGIS

I´m trying to install a SOAP API called SUDS, on a Windows 7 OS, to be able to run SOAP from the QGIS Python console and pyQGIS/Python scripts. The only Python I have installed is the one comming ...
2
votes
1answer
1k views

Configure Orfeo Toolbox to work with QGIS v2 Windows 7 from standalone installer

I have asked this question on the QGIS mailing list, but have not yet had a satisfactory result. The QGIS manual at http://www.qgis.org/en/docs/user_manual/processing/3rdParty.html is confusing about ...
6
votes
1answer
2k views

Atmospheric Corrections for Landsat 8 OLI Using Orfeo Toolbox

I am trying to correct some Landsat 8 OLI imagery using the Orfeo Toolbox Optical Calibration tool via QGIS. I've retrieved data from Aeronet as well as relative spectral response data for the OLI ...
4
votes
2answers
334 views

How do I generate a random raster (or probabilistic cellular automaton) in QGIS?

I'm trying to create something like a cellular automaton land cover change model using QGIS, in which cells randomly change land cover based on probabilities determined from various input rasters. ...
5
votes
3answers
428 views

Cleaning up data in Excel for use in QGIS

I am trying to clean up a large .txt dataset in Excel. I think that a macro or another application may be able to clean up the data they way I want but I have limited programming skills. I need to ...
4
votes
2answers
559 views

How do I set layer transparency in QGIS 2.0 with Python?

I have a raster layer loaded in QGIS and I'd like to be able to set its transparency via the Python console. I'm new to the API and have not been able to find out how to do this. Any help would be ...
18
votes
3answers
333 views

Python literature relevant to QGIS

Python for ArcGIS is a book that I have been looking at. Does anyone know if this would be applicable in QGIS? I am not looking to write application/plugins, simply get better at understanding ...
11
votes
3answers
407 views

How to update file locations in QGIS projects?

I don't know if there is an answer to this question, aside from the obvious. I have about 30 different QGIS Project files for 30 different clients. Each is saved onto my computer and all their ...
2
votes
2answers
163 views

Set projection/CRS in map and shapefile to produce buffer

I simply want to create a buffer of a specific size, around a single point. When I create a buffer it uses degrees/ or radians, or whatever, and the buffer is created that covers the whole screen. I ...
2
votes
2answers
76 views

Delete photos with no location in EXIF information

I can extract the locations of my photos in QGIS using Photo2Shape or Geotag and import photos, but I want to be able to delete the photos that do not have location information with them (they are ...
1
vote
2answers
464 views

QGIS - load data by SQL window

I have problem with QGIS (2.0.1), PostGIS (2.0.4) combination. - A can load tables or views by Add PostGIS layer. This is OK. - But a can't load data by DB Manager and SQL Window. Executing query ...
5
votes
4answers
2k views

How to convert raster to point in QGIS

I wanted to convert Raster into Point Vector in QGIS. Is it possible? QGIS have option to convert it into polygon but i didn't found any tool to convert it into point. can anyone help me?
0
votes
0answers
41 views

How to perform Visibility Analysis using QGIS? [duplicate]

How can I calculate Visibility using QGIS? I have not found any suitable plugins for QGIS to do this.
2
votes
1answer
70 views

QGIS; Is it possible to show layer name in attribute table in print composer?

When adding attribute tables in the print composers it is not possible to distinguish between various tables from various layers; each table is generic and does not indicate which layer the table is ...
0
votes
1answer
63 views

Setting up Raster Calculater for QGIS Python Console: ImportError?

I'm trying to follow the instructions here How to evaluate raster calculator expressions from the console? to set up the python console to to use the raster calculator. I tried: from qgis.analysis ...
0
votes
1answer
135 views

QGIS raster calculator “not equal”?

Is there a syntax for "not equal" in the QGIS Raster Calculator? If so, what is it?
1
vote
2answers
244 views

Editing vector data over the net: WFS or PostGIS?

I'm using QGis to update the attributes of a large vector dataset (~20,000 polygons) stored in PostGIS. I'm going to have to do that to other large datasets so the idea is to bring in more people, ...
3
votes
2answers
138 views

Why can't I open a .xls with QGIS in OSX?

I'm trying to open an .xlswith QGIS 1.8 in a Mac, I'm loading the vector layer from Add new vector layeretc. etc. the procedure works in Windows but not in Mac where I have an error Invalid source ...
1
vote
2answers
589 views

installing older version of QGIS on Ubuntu

I recently installed the latest version of QGIS (2.0) on my UBUNTU 12.04. But am not very satisfied with it. I would like to uninstall it and reinstall QGIS 1.8 v on Ubuntu. Am unable to do so. It ...
1
vote
0answers
30 views

Map algebra from QGIS python console? [duplicate]

What command do I use to do map algebra on rasters from the QGIS python console?
1
vote
1answer
61 views

Problem about exporting the project

I'm working on a project using QGIS. I have 3 layers in the project, city boarder, the location of the natural monuments, and a layer as background card. I am going to have these three layers in my ...
0
votes
1answer
148 views

Problems installing the Astun Technology Loader in Windows 7

I previously asked a question Using OS Mastermap SLDs in QGIS I got several answers suggesting that I use the Astun Technology Loader. There are details on how to do this ...
10
votes
1answer
438 views

PyQGIS file lock release

I was wondering what triggers the release of file locks in pyQGIS? I am trying to delete a few data sources (used temporarily) by calling QgsVectorFileWriter.deleteShapeFile, but I have to quit QGIS ...
0
votes
1answer
291 views

How to check if REST plugin is installed for GeoServer

Hi I am having trouble uploading vector files onto GeoServer 2.4 using 'Import Vector' in the QGIS Processing toolbox. After reading around about the 'REST' plus in I went to: http:// Also when I run ...
0
votes
1answer
385 views

Using CASE expression in QGIS data defined properties

I try to use CASE expression in my data defined properties, like this: CASE WHEN "ASULKM1999" > 100000 THEN 5 END ASUKASLKM is population information and "5" will be size of point symbol. ...
0
votes
0answers
112 views

How to use relative path in mac for open internal and external file?

I would like that my project would be portable, I mean that I can share it without lose all the path I have in my project. This seems not so easy and many times I have to re-set all the path when I ...
0
votes
0answers
103 views

Doubt in Field Calculator

I am working in an project.I have a point Shapefile its projection is NAD83(HARN)Pennslyvaniasouth(ftUS)*EPSG3365* when I measure its distance(between two points) it gives me the answer in feet .yes ...
2
votes
1answer
365 views

How to change layer transparency without changing border lines?

I have a raster image of elevations. I have added a vector shapefile that contains local political divisions. I want to keep the elevation colors, but I want to keep the black lines representing the ...
1
vote
2answers
134 views

How do I Fix Projection Issues in QGIS

I have some exiting shape files that supposedly have a CRS of OSGEO:41001. If I import new data, and set the CRS to OSGEO:41001 they do not align. If I change the CRS of the new layers to ...
4
votes
1answer
711 views

How to transfer styles from QGIS to ArcGIS?

We have a QGIS project that has symbols for a lot of different lines. Data comes from a geodatabase that is accessible to both QGIS and ArcGIS. We now want to use the symbology of the QGIS project to ...
0
votes
1answer
47 views

Is the rule-based styling not supported on the server?

I have been using the rule-based option to style some of the layers (from a postGIS database) in my qgis project. Then I put the project on the server and when I checked the WMS connection in QGIS, I ...
2
votes
1answer
944 views

Saving vector layer with specific symbology

I am creating a polygon feature layer with soil classes. I need to share this layer with some colleagues and I need the layer to maintain the color ramp I have created. Is there any specific format ...
2
votes
2answers
417 views

QGIS 2.0 Atlas Generation: Can I force the selected feature to be the last one rendered

I have a layer with a number of features that represent zones which share some boundaries with others. I am using Atlas generator to produce a set of maps, one for each zone extent. The zones are ...
2
votes
2answers
180 views

Merge point features within a given radius [duplicate]

I have a file in QGIS with 5000 points. Some of the points are really close to each other (5m). How can I cluster the point features to one point feature if they are within 5m? The new points should ...
0
votes
0answers
90 views

QGIS, SpatiaLite and GPS integration

I have QGIS an, access database and a Haicom gps all connected and running on a windows 8 machine. I want to integrate all 3 items so that while in the field i can enter information into the ...
3
votes
2answers
1k views

How to resize the map item in QGIS print composer without changing scale?

Is it possible to lock the scale in the QGIS 2.0.1 print composer? Every time I resize the map, the scale is adjusted. This makes trying out different map layouts really annoying.