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

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4
votes
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47 views

TypeError: QgsEncodingFileDialog

I am using the latest version of QGIS (Lyon) on MAC and have set the default Python version 2.7. Moreover, I have installed all the required python modules and GDAL. It was working before, but now, ...
4
votes
0answers
36 views

Is it possible to have a locked TOC in QGIS

I would like to customize QGIS for a custom use case where the user will work with a very simple customized UI and will just digitize features in existing layers. Therefore the TOC should be locked, ...
4
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55 views

Insert sequential row and column values automatically into a fishnet dataset

I have a grid that has about 30 rows with approx 15 columns each. I want to label them as A1,A2,B1,B2 etc (Alphabet row, integer is column). Is there any way to do this programatically? There is no ...
4
votes
0answers
87 views

QGIS/OGR shp to tab export - crashing Mapinfo due to number format issues

I created a vector grid in QGIS and it exports as SHP -no issues. When I save as tab and try to open the file in MapInfo it crashes. According to ...
4
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0answers
79 views

Thematic map exported using QGIS2Web is extremely laggy

I have made a world thematic map and added layers of data for creating graduated color scheme on the country level. I need a interactive map as an output which shows values when user hover over any ...
4
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0answers
63 views

Calculating angle using three WGS 84 points

I am looking for a way to calculate an angle between two points at a specific third point. My coordinate system is WGS 84. I can measure the angle with QGIS clicken on those three points, but I want ...
4
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0answers
48 views

QGIS Atlas: Filter maps based on attributes (more than one)?

I have a series of maps with the same geographic boundaries but with different set of points (from the same layer). I would like to create an Atlas where the change is based on the attributes. A ...
4
votes
0answers
63 views

Can I clip a geodatabase vector layer in QGIS?

I have a Vector layer loaded from a .gdb (geodatabase directory). I'm seeing my contour lines fine. I've drawn a polygon on top of the area I want to crop on a new layer. I select Geoprocessing ...
4
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116 views

Different styles in same label

I have a multiline label made of 3 attributes made through an expression like: "Length" || '/' || "Level" || '/' || '→ ' || "Bearing" || ' ←' I'd like to make the Length and Level lines in ...
4
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67 views

QGIS Profile Tool shows no profile

I have installed and followed the process to produce an elevation profile from the Route Profile plug-in in QGIS, but for some reason I am getting no profile to appear. The grids are from OS ...
4
votes
0answers
60 views

Custom forms feature in QGIS: QMessageBox.warning closes QDialog as well

I am attempting to work with custom forms in QGIS. I have included a validate function in my code that will pop a QMessageBox() if the validation fails. My problem is that when I close the QMessageBox ...
4
votes
0answers
45 views

Combine multiple adjoining parts of a single feature

In QGIS, one polygon feature resulted from merger of several adjacent polygons. This one new polygon feature has a single line through it that I would like to eliminate. When hovering over individual ...
4
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0answers
61 views

OS terrain 50: .vrt from zip files

I tried to follow what was suggested in How to use OS Terrain 50 in QGIS, but I got the following problem: in spite of being generally able to generate .vrt files using gdalbuildvrt from unzipped ...
4
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0answers
36 views

Stretch to MinMax results in blank render output in QGIS?

I am a new QGIS user, and I can't figure out if I encountered a bug. If I have a multi-layer image, and "Multiband color" -> "Stretch to MinMax" selected I get the following behaviour. QGIS takes a ...
4
votes
0answers
74 views

QGIS 2.10 Can't load georeference plugin?

Apparently my problem was already present in older versions of Qgis. I don't know how to fix it, knowing I have a Linux system (Fedora 23). Somethiing similar here : Where to download QGIS 2.10? So, ...
4
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0answers
65 views

Buffer neighbouring polygons without overlap using QGIS

Is it possible to create a buffer around neighbouring polygons, so that the new polygons do not overlap? Preferably in QGIS but any other tool will do. So instead of the first result I would like ...
4
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0answers
42 views

QGIS Georeferencer is stretching image

I'm trying to Georeference an image. I've followed the guide from QGIS, but for some reason, it's stretching, and offsetting the image from the points. For example, my input of the southwest corner ...
4
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0answers
30 views

Center my contour values in QGIS

In QGIS have an issue with my contour value labels being pushed to the edge of my map, instead of lining up at the center where they seem to have more space. Does anyone know why this happens for some ...
4
votes
0answers
189 views

“Error” on Advanced Digitizing Window in QGIS

I have the word "Error" that has appeared on my Advanced Digitizing Panel since upgrading to QGIS 2.12.0 Lyon. It doesn't appear to actually affect anything negatively... has anyone else seen this or ...
4
votes
0answers
89 views

How to load layers from postgres using SELECT statement?

I am trying to load a postgres table (columns extracted using a select statement) from the python console in QGis: The following works fine and the layer loads as expected: uri = QgsDataSourceURI() ...
4
votes
0answers
205 views

QGIS 2.10.1 & SQL Server 2014

I'm struggling to load spatial data into QGIS from SQL Server 2014. I have a table with 4 geography columns (3 are polygon layers, one is a point layer). The table has a primary key column that is a ...
4
votes
0answers
96 views

Integrating numeric scales into a text or HTML box in QGIS print composer.

I am trying to embed the scale of a map in the print composer expression builder or HTML frame. Effectively the value of the scale in the map item properties would come through into the text and be ...
4
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0answers
320 views

Error when using r.watershed in QGIS 2.10.1 with Grass

I am running r.watershed within QGIS processing the I get the error below. I draw your attention to: GRASS_INFO_WARNING(2205,1): Subprocess failed with exit code 256 GRASS_INFO_END(2205,1) ...
4
votes
0answers
660 views

Connect to QGIS 2.6 Python Plugin function via button on custom feature form

I am trying to connect to a QGIS 2.6 Python plugin function via a custom feature form button. On my feature form, I'm attempting to do a few things : enable the updateButton only if the ...
4
votes
0answers
246 views

How to digitize in stream mode in QGIS, using a tablet?

How to digitize in stream mode in Qgis, using a wacom cintiq tablet? freehand it's no use. i need something like MNDR stream digitizing extension for arcview 3.x, which allows continuous tracing, ...
4
votes
0answers
122 views

Merge Raster Layer Specific Order in Graphic Modeler

I'm using the Graphic Modeler/Processing Modeler to automate a process. The last step in this process is Merging three different Raster Layers. I'm using the "Merge Raster Layers" from Saga 2.0.8. Is ...
4
votes
0answers
100 views

QGIS - Auto-Update Color-Ramp to Current Display Extent

When displaying raster files in Qgis with the color-ramp stretched to the min/max values of the current display extent, the min/max values don't update automatically when zooming or panning to a new ...
4
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0answers
95 views

Is it possible in QGIS print composer to include a numeric scale in an html box?

For work I always have to create a table with my name, project name, date etc. into my map layouts. I also need to include the scale like "1:150000" in that table. So far I am solving that by ...
4
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0answers
349 views

Display a color ramp legend (of a vector layer) in the qgis map composer

I would like to have a color ramp instead of 10 categories of color when displaying my vector layer in the map composer of QGIS. Is it possible ?
4
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0answers
398 views

How to debug Quantum GIS PlugIn Visual Studio DLL?

I have developed a Quantum GIS plugin layer using Microsoft Visual studio and placed it in my plugins folder of my customized QGIS application. I now intend to debug the DLL using Microsoft Studio. ...
3
votes
0answers
32 views

QGIS, deleting last placed vertice while digitizing, can I custom keyboard shortcut this task?

Upon searching this topic, I found the answer of using the delete or backspace key to delete the last placed vertex while editing. My question, Is it possible to reprogram this delete function to a ...
3
votes
0answers
54 views

How to integrate python-docx with QGIS

I have installed the newest QGIS and downloaded python-docx from this link python-docx . I haven't installed separately a different version of python. Is it possible to integrate this package of ...
3
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0answers
31 views

Import DGN file with QGIS

I want to open my V8 dgn file with qgis without any loss of informations. Please, do you know an extension supported by QGIS to do this job.
3
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0answers
44 views

How to access attributes from linked tables (QGIS 2.14.2 Essen)

I have one source shape file like this: It consist the geographical coordinates of weather stations: And several attribute files, wich contain the Temperature data of each date for several years ...
3
votes
0answers
56 views

Optimize CSV to QGIS workflow?

I am using statistical analysis software to pick out specific city lots within a database of around 500,000 lots. This is exploratory work and I'm mapping each test out in QGIS through an imported CSV ...
3
votes
0answers
28 views

Why is the unique ID field in Distance matrix empty for some inputs?

I have some coordinates in a .TSV file I import using the delimited text layer button. I have a different set of coordinates (actually, one point) that I import in the same way. What I've tried so ...
3
votes
0answers
22 views

How to blend edges of aerial imagery with gdalwarp

I need to fade/blend the edges of a series of aerial images with gdal. The closest thing that I've been able to accomplish is using the -cutline and -cblend switches of gdalwarp to get the edges to ...
3
votes
0answers
25 views

Inputting Layers in QGIS for PyWPS Processes

I recently downloaded the PyWPS demo files from github here: https://github.com/PyWPS/pywps-4-demo. I'm having some trouble figuring out how to use some of the processes. In particular, processes like ...
3
votes
0answers
39 views

QGIS 2.14: Missing list of algs in modeler (processing plugin)

I changed my QGIS-version from 2.8 to 2.14. I am very happy that v.net algs (grass7) are available now as part of the processing plugin. But now there is no list of algs inside the modeler - so no ...
3
votes
0answers
26 views

GRASS7 r.water.outlet doesn't run correctly in QGIS 2.14.2

I am a new user of GIS software and I am currently facing an issue with the GRASS7 tool `r.water.outlet. I am a beginner with both Linux and GIS. I am using Ubuntu 14.04 with QGIS 2.14.2 and GRASS ...
3
votes
0answers
53 views

Render Vector & Save as Raster

I am working with ENC files from noaa, specifically S57 format or ".000" to be as specific as possible. I am trying to render a layer or even the entire thing in a window but have had no luck. ...
3
votes
0answers
53 views

How to generate static heat maps server side?

I've been searching a way to generate server side static maps using Python (or any other languages, doesn't matter) I can create the maps I want with Qgis (And they look really great) but I don't ...
3
votes
0answers
59 views

QGIS freezes /crashes and Minidump-Analysis

I am using a QGIS-project with several WMS-Layers(up to 20) and Shapefiles for digitizing. There are random freezes of QGIS(2.14.1) which end up in a crash of the program. Minidumps are not always ...
3
votes
0answers
60 views

Tools to help migration from Mapserver to QGIS Server

I'm going to migrate a Mapserver WMS server to QGIS Server. I'd like to know if there are some tools or plugins that convert Mapserver mapfile (.map) to QGIS project file (.qgs). WMS responses ...
3
votes
0answers
45 views

Classify image using segmentation analysis using QGIS and OrfeoToolbox

My first question on stackexchange (sorry for my english language)! I use stackexchange often to understand GIS principles and workflows. I wasn't able to find a answer. For this project we made a RGB ...
3
votes
0answers
36 views

Rectangle shapefiles with the same extents does not align perfectly after projection

I have a rectangle shapefile built with UTM19 coordinates using a python script, and then projected to NAD83_CSRS (EPSG:4617). I have a second rectangle shapefile built with the same method (python ...
3
votes
0answers
54 views

Approach to controlling which layers display in a QgsComposerLegend

I've tried 2 approaches to control what shows up in print legends. Neither of them work which is troubling because other than pruning the layerRootTree in advance of composer.addItem(legend), there ...
3
votes
0answers
32 views

QGIS Dissolve skips polygons

I'm having trouble with the dissolve function in QGIS. Is it because of an overlap? It's not a GRASS layer, just shapefiles. I'm new with GIS software in general. Searched for similar problems but ...
3
votes
0answers
26 views

Large File Sizes and Print Composer not printing

I have been working on a heavily detailed map using qgis for the last two years. I am runnig QGIS Essen 2.14.1 on a windows 7 home premium 64 bit with 4gb ram. The file size of the map is around ...
3
votes
0answers
41 views

Missed "processing' panel in QGIS 2.12.2 Lyon

I have missing 'processing' panel in my QGIS Lyon version. It happened once some time ago, so I re-installed program then. And now I have the same situation - I've cleaned my QGIS registry key and ...