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

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2
votes
1answer
10 views

Display the size of the dot based on the value

I import a CSV File and for each coordinate, I get a point in the map. Can I set a column for the value. Then the size should based on the value have a special size. Or based on all values, it should ...
0
votes
0answers
18 views

error in selecting data from attrribute table QGIS

First of all, im not sure why all the data points from my csv file does not show up on qgis. I enabled custom delimiters to commas and still have no clue. it worked for my other vector layers except ...
1
vote
2answers
19 views

non alignment of base layer and other vector layers

i'm sure you've encountered this problem repeatedly. i've tried all different methods. Enable on the fly crs transformation. go to settings and options to use crs data. go to properties and change ...
2
votes
1answer
21 views

How to change the edit widget for fields in a layer with PyQGIS?

Is possible change the edit widget with PyQGIS? I have made an extension that loads a PostGIS layer and I want to edit the date fields with the date widget by default without any change in the ...
0
votes
0answers
12 views

How to reload a raster file from the python shell

I do this in the QGIS python shell: # get the raster file (and data) of the active layer canvas = qgis.utils.iface.mapCanvas() rLayer = canvas.currentLayer() rLayerPath = ...
3
votes
3answers
42 views

QGIS won't read table columns in CSV import on Mac OS

I am trying to import a CSV file to QGIS, but it ends up looking like my print screen below (program is in Swedish but in the preview window you can how QGIS won't read my data correctly). I can't ...
1
vote
0answers
10 views

QGIS Project: where to put CORE_Export definition in Visual studio 2010

I am trying to develop a QGIS application with the following setup: OSGE4W qgis Libs QT 4.8.5 Windows 7 Visual Studio 2010 I have all the references setup in VS, but am not sure where define the ...
0
votes
0answers
14 views

Can I display customer addresses based on their address?

I have a CSV file with a lot of addresses of customers. Can I import this and it display a point on the address and all other information from the CSV for this entry? I want to display later in wich ...
1
vote
0answers
14 views

TIN Interpolation in QGIS creates weird lines?

I am using TIN Interpolation to interpolate point features based on their cost attribute (value is between 0 and 5000). Graduated symbology creates something like this: However when I am using TIN ...
1
vote
0answers
6 views

QGIS Molusce problem

I have a problem in QGIS Molusce plugin. I opened two raster files represeting LULC of 2 years, and roads as a spatial variable. The result of geometry check was positive. On Area changes tab clicking ...
4
votes
1answer
70 views

QGIS freezes after making and saving many edits to a layer

I work with QGIS 2.4 on windows 7. The problem occurs when I work on a layer and save it many times. After a random number of saves, pressing the save button once more causes QGIS to freeze, all ...
1
vote
1answer
77 views

What is the “Auto Open Form” checkbox used for?

Windows 7 QGIS 2.6 - 64 bit Feature - Identify Results Could someone help me understand what is "Auto Open Form" checkbox used for.
-1
votes
0answers
9 views

pgrouting in qgis for finding path from source to target

I have installed QGIS and for my project i need to give the shortest path to user from source to destination and following this tutorial http://workshop.pgrouting.org/chapters/shortest_path.html In ...
2
votes
1answer
49 views

PyQGIS load dxf file as a vector layer

Can somebody help me with loading a dxf file as a vector layer with PyQGIS? Is QgsDataSourceURI an option? I've tried it with this code, but it didn't work. fitxer="/tmp/prova.dxf" uri = ...
0
votes
0answers
9 views

GRASS 7.0.0beta3 / statistics change after TIF import?

I'm new to this forum, and pretty much a beginner with GRASS (7.0.0beta3 installed atm). So my question is the following: Statistics (mean, min, max) change quite a lot after importing a .TIF grid ...
-1
votes
0answers
16 views

QGIS, Android and bug on invalid qt version [on hold]

It´s already reported, (http://hub.qgis.org/issues/11711) but there seems to be an on-going proces on this issue. I really need QGIS running on my Android (Nexus 10) and so do other users. Can ...
2
votes
1answer
58 views

Best practice for a group working on the same shapefile, with open source tools

We are a small (~5) group working on a single, shared shapefile. The current workflow is that each one of us does the editing on a designated attribute field, on his local copy, then exports the ...
1
vote
1answer
17 views

QGIS get the X and Y of a raster file by click

I have a raster file (Geotiff) and try to write a plugin that can change the value of one cell in a raster (== array cell). I know how to get a QGIS point but how can I get the array index from on ...
0
votes
1answer
11 views

QGIS extend raster layers extension

I want to extend a raster layer to another layer's extension (my input raster layer is smaller). The new raster cells should have 0 value. Is this possible in QGIS?
1
vote
1answer
146 views

autocad-map of real estates with own coordinate system and information to be converted to use it in QGIS

I have a question regarding CAD and QGIS, but unfortunately I don't have a clue of CAD. Here it goes: Real estates data has been mapped. There are several reference points surrounding the area. So ...
0
votes
0answers
11 views

Older QGIS 2.4 version installation in Ubuntu 14.04 instead of QGIS 2.8 [duplicate]

Right now I am trying to run SWMM model on QGIS2.8. But the swim plugin is not compatible with 2.8 version of QGIS. Can anyone suggest me how to download and install qgis 2.4 on Ubuntu 14.04. It ...
1
vote
1answer
130 views

Smoothly interpolating Polygons from set of coordinates?

I'm still quite new to QGIS and I'm using it to display and analyze my soil data. I have point information on the distribution of the soils in a specific area and I need to create a soil map from ...
1
vote
0answers
9 views

Unable to obtain linear distance matrix

I am using QGIS 2.6 (Brighton) and when doing a distance matrix, the output csv file appears blank. Is it possible that somehow the shapefile I am using is corrupted?Has anyone please got any hints or ...
3
votes
3answers
89 views

SAGA installation in QGIS 2.8 on debian linux

I install QGIS 2.8 in debian (linux) through nightly jessie (qgis testing) and I see that SAGA is not in processing toolbox, so I install saga gis software but still it doesn't appear in processing. ...
-2
votes
0answers
19 views

Installation procedure for older version of QGIS (2.4) on Ubuntu 14.04 [on hold]

How do I install an older version of QGIS, specifically 2.4, on Ubuntu 14.04?
0
votes
2answers
22 views

WMS not loading in QGIS 2.6.1 Brighton

I'm using QGIS 2.6.1 Brighton, trying to load the following WMS layer: http://services.nconemap.com/arcgis/services/Imagery/Orthoimagery_Latest/ImageServer/WMSServer I can successfully load the WMS ...
1
vote
2answers
29 views

Is there a “Identity (Analysis)” tool for QGIS?

In ArcGIS, there is a tool called "Identity." Say you have a bunch of points. Some points fall in polygons of interest, some don't. Each polygon has a unique ID. This tool will add a field to the ...
2
votes
0answers
18 views

Changing the background color of the Georeferencer in QGIS

Is there a way to change the background color of the Georeferencer in QGIS? What I mean is, can I somewhere change the color that does not belong to the image that is about to be georeferenced? Let’s ...
0
votes
0answers
30 views

Projection transformation into WGS 84

How to perform transformation from EPSG 4012 to WGS 84 in QGIS? I have tried to convert from EPSG 4012 (Unknown datum based upon the Clarke 1880 (RGS) ellipsoid) into WGS 84 in QGIS with no ...
1
vote
0answers
12 views

Label moved with Move Label Tool disappear on QGIS v2.6.1

I have done a deep research on previous post about "move label tool", but I have not found the correct answer for my case. I have the version 2.6.1 of QGIS. When I select a particular point of my ...
0
votes
0answers
10 views

Multiple raster layers of same area need georef.

I have many raster layers that I need to georef to my existing vector layers. Some are 8 unsigned, 32 float and 64 float. Is there a way to georef all the layers at once so they all have the same ...
1
vote
1answer
14 views

Raster layer - changing values in raster cells

I have a lot of cells in a raster layer (GeoTIFF) with a -9999 value in it. I would like to update that values to 0. I mean, in vectorial layers would be something like: CASE WHEN band1=-9999 THEN 0 ...
0
votes
0answers
17 views

Tools for building and exporting high resolution geotiff

I'm having some really nice raster maps in geotiff format. I would like to add some features to these maps as well as then exporting them as tiles for serving the map from a web server. Preferably I ...
0
votes
0answers
9 views

QGIS Import WKB csv file

I have a csv with a unique field that are the coordinates of thousands of points but in WKB format. How can I import all the features into QGIS? CSV file is like this: ...
2
votes
1answer
40 views

Why processing.runalg(“gdalogr:rasterize”…) is not creating out files when running in the QGIS 2.6.0 console?

I want to use the QGIS python scripting functions to turn to rasterize a point vector using many different dimensions. Right now my code looks like this: import processing RasterPixelSize = ...
12
votes
2answers
11k views

How to Add OSM Layer to QGIS

How can i add OSM layer in QGIS? The help says there is an OSM plugin i can use. But i don't see it the list of plugins. Or maybe there is a WMS URL for OSM i can use? QGIS version ...
1
vote
0answers
14 views

How to batch “Layer save as”-process in QGIS?

I want to save many (about 100) QGIS-layers at once. Is there an automatic way to batch the "save as"-process?
1
vote
1answer
40 views

Why is my map zoomed in so ragged compared to what I actually drawed in QGIS

So overall my map looks the same like what I draw in QGIS. The issue is that when I zoom in, in that case 54x then you can see ragged lines. QGIS Browser That is not what I need. I need high ...
1
vote
1answer
19 views

'Add image' doesn't provide north arrow directory in QGIS Brighton

I'm still using QGIS Brighton to finish a map in Composer and would like to add a north arrow to it. In previous versions I added the arrow as an image, but when I click on 'add image' and click on ...
4
votes
3answers
974 views

Qgis is slow with complex 'postgis query' layer. How to speed up?

I have a postgis layer in Qgis that is a result of a complex query. Every screen update, Qgis runs the Query again and that's slow. Any suggestion on how to speed up? EDIT - Here is the query: ...
0
votes
1answer
174 views

Why do pdf/image exports fail with OpenLayers Bing layers?

When I try to export a print composition it generates a 0kb file. Is not possible to open this file. It happened the same with export as image option. The print composition model is coming from a ...
1
vote
0answers
17 views

QGIS Print Composer grid - curved latitude lines

QGIS 2.8.1 I am preparing a map of the North Atlantic and Arctic Regions in EPSG:3996 IBCAO North Polar Stereographic to display the geometries closer to their shape and size. In Print Composer, I ...
0
votes
1answer
9 views

QGIS web client installation: this.projectSettings.capability is undefined

I am trying to debug my configuration of QGIS web client. I have the same problem illustrated here (the GIS-Browser appears but it keeps loading map for the two sample projects ). Yet following the ...
1
vote
1answer
35 views

QGIS 2.8.1 print composer wont export all OpenCycleMap base layer tiles

My set-up is Linux Mint 17.1, 32- bit system, QGIS 2.8.1-Wien. I have a map with 5 layers. In Print Composer the extent of the map is 32.5km x 22km square and the print page size is A1. I am ...
1
vote
0answers
14 views

QGIS Rasters - Filling no data cells

When making a sum between two raster layers, for every cell, if one of the two cells have no data in that cell, the opeartion is not done in that cell, example: In QGIS raster calculator I do: ...
2
votes
1answer
16 views

Odd behavior in a QGIS plugin: my function is triggered twice

I have a plugin with a function (triggered by a button) that selects a specific layer by name, then shows its attribute table. When I close the plugin and open it again, the attribute table pops up ...
1
vote
1answer
20 views

Error in executing commands in GRASS GIS

I'm using Grass 6.4.3RC2. I have a problem because when I execute the command: r.radcov csv_file=cell_list_hataDEM_umts_amc_testTEST.csv dem_map-AlbSRTMdem@PERMANENT clutter_map=AlbClut@PERMANENT ...
1
vote
0answers
14 views

QGIS Raster Calculator, joining two raster

In QGIS raster calculator I do: Plus (+) And I get: The red circle in the middle is like cut in the result, QGIS it's not adding every pixel on each raster, it makes a kind of ...
0
votes
1answer
25 views

How to change the QGIS edit cursor and node icons?

Two things I really dislike at QGIS, are the "fat" node icons (when editing lines) and the cursor which cover the object below and make it impossible to accurately move a node. Is it possible to ...
1
vote
1answer
17 views

Use raster memory layer from QGIS processing result

I want to apply subsequent QGIS raster processing algorithms in a python script. I want to use memory layers for intermediate calculation results since I am only interested in the end result. As ...