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

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3
votes
1answer
271 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
1answer
33 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 ...
2
votes
1answer
135 views

Why does this Python script only work once on QGIS?

I have a Python script to change the color of some specific features (lines) using categories in a vector layer. When I import the script in the console, the first time through the console it works ...
1
vote
1answer
104 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 ...
1
vote
1answer
85 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
134 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 ...
0
votes
0answers
22 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
0answers
42 views

Unable to obtain linear distance matrix [closed]

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 ...
1
vote
2answers
230 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 ...
2
votes
0answers
454 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 ...
1
vote
1answer
198 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 ...
2
votes
2answers
325 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
1answer
949 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 ...
5
votes
1answer
1k views

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

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
137 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 ...
1
vote
0answers
209 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
1answer
134 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
0answers
178 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 ...
1
vote
1answer
139 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 ...
1
vote
0answers
33 views

QGIS Rasters - Filling no data cells [duplicate]

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: ...
1
vote
1answer
123 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 intersecction......
1
vote
1answer
84 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 ...
2
votes
1answer
298 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 few layers including OpenCycleMap as a basemap. In Print Composer the extent of the map is 32.5km x 22km square and ...
6
votes
6answers
1k views

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

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

Creating custom map in QGIS?

I want to create an interactive map in qgis using this image but i cant understand the tutorials on youtube. I learned that it is georeferencing but the y already have shapefiles when using ...
0
votes
1answer
194 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 ...
2
votes
1answer
146 views

Getting only points when importing from OSM to Postgresql

This is my very first time working with OpenStreetMap data so feel free to tell me if I am forgetting important information. I am trying to import some data from OpenStreetMap into PostGreSQL. I ...
1
vote
2answers
109 views

Clipping a raster layer with a shapefile on mac

I am trying to clip a raster layer using the raster clipper function. However, for some reason this is not working for me and I haven't been able to find the answer anywhere. I choose my raster ...
3
votes
1answer
187 views

QGIS Modeler flexibility and errors?

I'm trying to build a simple multi-step selection (by attribute) with the QGIS Modeler. I created a simple sample layer to avoid data-driven errors. Now I want to query the layer and select features 1)...
1
vote
1answer
319 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 ...
1
vote
1answer
60 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
360 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 ...
2
votes
1answer
111 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 ...
0
votes
0answers
97 views

QGIS expression: select from <layer> possible?

I have a project file with many nested layers and would like to query certain layers without having to click on them first. The expression tool however requires me to select the layer I want to query. ...
2
votes
1answer
839 views

How to delete a column from the attribute table of a SpatiaLite layer?

I want to delete a column from Attribute table but the function "Delete columns" isn't highlighted. (When I am adding new layers I use New SpatiaLite layer, not Shapefile layer). So I have installed ...
1
vote
1answer
98 views

How to select from selection with PyQGIS?

The expression box has a handy "select from selection" button. Is there a way to emulate this with python? I have the basic expressions down, but can't find a way to do this.
1
vote
0answers
69 views

How to load “soil types” in QGis?

I want to show soil transmissivity per pixel. Thus, I determine water holding capacity of each pixel (ignored other effective parameters). Respectively, I wonder, What is the soil data format and How ...
2
votes
3answers
95 views

QGIS python plugin appends values every time it's started

I've written a small python plugin (using plugin builder as base) to simplify the expression process for a given layer (just a few comboboxes that are used to create a query). The combo box populating ...
1
vote
0answers
58 views

Problem between files with same coordinate reference system

I have 2 shape-files. The first created with Qgis and the other with R studio(driver=ESRI). When I import them in qgis i see they doesn't "fit". Both have EPSG:4326 - WGS 84. The only difference I ...
1
vote
1answer
292 views

new layer from calculations with fields of other layers in QGIS

I've two layers, both with the same fields: A, V, where A is the shape's area and V a value given by me. I want a new layer with shape created by the intersection of the other layers' shapes and a ...
1
vote
1answer
118 views

Problem with QGIS - Attribute names are shown as _1,_2,_3 … and Strings are displayed as “NULL”

Whenever I look at the attribute table or at the attribute dialog for a shape, the attribute names are shown as _1,_2,_3, ... In the attributes, Strings are generally displayed as "NULL". Numbers are ...
2
votes
1answer
416 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 = (10.0,...
1
vote
2answers
413 views

Can't compile plugin builder plugin in QGIS 2.4 (Windows)

I'm trying to build a basic plugin using plugin builder but I can't even compile it. I tried following a few tutorials and just trying to compile whatever but that always results in the same problem. ...
1
vote
0answers
127 views

In QGIS heatmap howto establish a fixed maximum range value for comparisons over time?

I have several data sets that represent a type of activity within a specific geographic boundary. Each heatmap I create shows the relative activity spread nicely, but I have been frustrated in my ...
3
votes
2answers
1k views

QGIS and Ubuntu 14.04 unmet dependency

I posted this on digitalocean, but it's imperative I resolve this problem. Freshly updated 14.04 and I went from trying qgis.org debian to the ubuntugis repo. Results: xx@XX:~$ sudo apt-get install ...
0
votes
1answer
55 views

Workaround for grouped layers to stay collapsed when opening project

Using QGIS 2.6.1 on Windows 7, whenever I open a project containing layers in various groups, they appear expanded. This is regardless if the project is saved when the layers are collapsed. I'm ...
3
votes
4answers
3k views

How to convert a vector map to raster in Qgis?

I am creating a thematic map (vector data) with different classes. How to convert this vector map to a raster map, keeping the classification?
3
votes
1answer
518 views

Can QGIS 2.8 load WMTS layers?

I'm having a bit of an issue loading a WMTS into QGIS 2.8. The application can connect to the WMTS, correctly identify the layers that are available and load the layer into the layer pane. However, ...
5
votes
3answers
2k views

Error when creating a new mapset with GRASS in QGIS

When I try to create a New Mapset with the GRASS plugin in QGIS I get an error or the program crashes. QGIS 2.6.1 (32-bit install, Win7). QGIS crashes completely when clicking "Finish" in the New ...
2
votes
1answer
126 views

Rotation matrix in the EPSG

I use Proj4j for a WebGIS and I have to create a new ESPG. I tried on QGIS to convert coordinates from a local system (in Greece) to a world coordinates system. First, I have to do a 2D ...