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

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Rototranslation + scale of pdf and dxf with USER CRS in QGIS? [duplicate]

i have a map PDF or DXF to georeferenced with only rototranslation + scaling. I use EPSG: 32632, also the map that I need to import is a survey (maxmimal dimension 5000 m x 5000 m), but his coordinate ...
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1answer
24 views

Adding non geographic data from MSSQL Database to QGIS?

In QGIS (2.8) I am trying to add non-geometric data / flat data that originates in a MS SQL database. This flat data later should be joined with other layers etc. Connecting to the specific database ...
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2answers
83 views

Making an overview with linked detailed maps in QGIS 2.8?

i want to create 4-5 detailed maps, and then an overview map that has rectangles that markes the locations of the detailed maps. Best case would be if the rectangles were links to the detailed map. ...
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1answer
58 views

Heat Map not showing up QGIS [duplicate]

I'm fairly new to QGIS and I'm trying to use Heatmap. I should be doing every thing correct. But when I click OK for it to generate a heatmap, there is no Heatmap at all (nothing changes). For the ...
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1answer
42 views

Advanced Digitizing Tools Crashing in QGIS 2.8.1 x64 on Ubuntu 14.04

I'm hoping someone here can tell me what I'm doing wrong... Whenever I use the Advanced Digitizing tools in QGIS, I crash after about 5 clicks. I'm even doing it without OTF transformations on. Any ...
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0answers
21 views

Export color map description from ArcMap to QGIS?

Concerning raster dataset color maps: Is there a way to convert the Raster Function Template XML: .rft.xml used by ArcMap to describe color maps for raster data into the .txt format used by QGIS?
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1answer
53 views

Importing CSV file with csvt data in QGIS (2.8) will not assign type “date” to fields

I have a dataset (in CSV) and am trying to add several fields with date information, so I can filter points based on this data and generate maps (in QGIS 2.8) which will form a chronological series. ...
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0answers
23 views

How to properly import georeferenced .dxf hatches/polygons into QGIS?

I have a georeferenced AutoCAD-drawing (some district borders I vectorized with Illustrator from a raster image), saved as a 2004 ASCII .dxf-file. When I import the file in QGIS ("Add Vector Layer"), ...
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2answers
69 views

How to retrieve start and end points for each line in line shapefile?

I have a vector(polyline) shapefile and I need to retrieve each line´s start and end points(nodes) and create a shapefile with these points. Then I need to add to the polyline´s attribute table the ...
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0answers
18 views

Routing through bottlenecks

I have two races in the same town that make use of the same stretches of roads/paths in places (sometimes in the same direction, sometimes in opposing directions). Given that I know the pace of the ...
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0answers
38 views

Coordinates heat map results are not the same as the shapefile [duplicate]

I have done with a heat map shapefiles as shown below. But the results of heat map coordinates are not the same as the coordinates of shapefiles. Is there a procedure that is wrong?
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31 views

How to create a real size buffer around a point in qgis

I have a postgis pointlayer in EPSG:3857, added to a project that is set up with OTF ON to project everything (other layers) to EPSG:3857. In postgis, I defined a view to dynamically create a buffer ...
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1answer
41 views

Is it possible to label places using local fonts like Singhala and Tamil fonts in Arcmap or QGIS?

I downloaded the Keyman desktop for the local keyboard/fonts. I would like to encode location names using Tamil/Singhala fonts in the attribute table and then use it to label the map. However, after ...
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0answers
19 views

I can't print a map with QGIS 2.8.1 and Mac OS X

I'm using Mac OS X 10.7.5 and QGis 2.8.1. I want to print a map with Print Composer. But the Buttons "Print" or "Export as PDF" don't work for me. If I use these buttons, the window for choosing a ...
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0answers
47 views

QGIS Server on Windows7 Step-by-step / Test wms by adding in QGIS?

I am trying to Test a WMS by adding in QGIS as per http://anitagraser.com/2012/04/06/qgis-server-on-windows7-step-by-step/ If I follow the steps, QGIS cannot find the server. When I take a look at ...
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0answers
31 views

How to split polygon with multiple points in QGIS?

I am working on spliting a polygon which includes multiple points. I tried it manually but due to the large dataset it is very time consuming. Are there any automated tools or plugins to do that? ...
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1answer
22 views

QGIS Editing live MSSQL Tables and Updating Fields

I am looking at creating a trigger on a live MS SQL spatial table that will update a field when a user either: 1. Creates a new feature 2. Updates the geometry of a feature. Unfortunately I have only ...
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1answer
42 views

List all Points within Polygon using QGIS? [duplicate]

Complete newbie to QGIS and can't seem to find how to do this. I have created a map with 84 different polygons. Then I've imported approx. 8000 points. What I want to do is now query my map and get ...
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0answers
17 views

QGIS attribute form editor crashes on Spatialite source

I have collected an attribute table (no geometry) together with other stuff in a Spatialite DB for easy portability. The idea was to hand off just one file and DB for field work. The Problem: The ...
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0answers
28 views

Modifying DEM elevation data in QGIS using a polygon

I've tried searching through the existing questions but am struggling to find a succinct answer to what I am trying to achieve. For background, I am running a flood model in TUFLOW to help support a ...
2
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1answer
50 views

Gdal_calc works but I get a pyhon error at the end of each process

I have a problem while using gdal_calc by a .bat file. Here is the code : call "C:\OSGeo4w64\bin\o4w_env.bat" gdal_calc ...
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2answers
67 views

QGIS and Google Streetview?

Is there a way to open an (embedded or not in QGIS...) window containing a Google Streetview view at given coordinates using PyQGIS?
2
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1answer
53 views

Connecting QGIS to query on MS Access database?

Is there a method to connect to an MS Access database file (.mdb) using QGIS? In particular I need to connect to a query in it. The database does not have spatial data.
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0answers
45 views

Is there any way to set a processing extent for QGIS:Voronoipolygon?

I was playing around with the QGIS:voronoipolygons command line function from QGIS and noticed that there was no option for setting the processing extent. This causes QGIS to pick the minimum extent ...
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0answers
20 views

Setting up PyCharm CE 4 to work with PyQGIS library in Mac OS

I am trying to set up pycharm to work with pyQgis library but with not success till now. I am using PyCharm CE v4 and QGIS version 2.8 I have tried to implemnte the instructions of several posts like ...
2
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1answer
94 views

How to create and remove multiple QgsRubberBands in PyQGIS?

Currently the following code-snip works great to highlight a shape based on the 'feature' and 'layer' variables: self.rubberHighlight = QgsRubberBand(self.iface.mapCanvas(),QGis.Polygon) ...
2
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1answer
59 views

What's the QGIS Legend Format Syntax to have thousands separated by commas?

I have numbers in the millions and would like to know what string to enter in the Legend Format box to have thousands separated by commas ex: 2,000,000
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1answer
55 views

How to use QGIS field calculator between different points of same layer?

I'm in a course learning about GIS systems, and we have recently recorded a gps track. I've exported this track as .gpx and imported the points into QGIS. Each point has a timestamp. One of the ...
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1answer
31 views

How to detect that QGIS is shutting down in a plugin?

I built a plugin in QGIS and needs to stop it when user wants to exit to remove signals and close properly. How can I get an event when QGIS is exiting ?
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0answers
65 views

Is there way to define processing extent in QGIS?

Is it possible to define the extent of a processing tool, like it is in the "Environments" in ArcGIS? For example "Same as Display, or "Same as Layer..".
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3answers
119 views

How to create a compressed GeoTIFF with the QGIS Clipper tool?

I have a geo-tiff created by Pix4D which is about 375 Mb in file size. I have clipped it to a smaller area using Qgis 2.8(using Raster ‣ Extraction ‣ Clipper), and the output file is about 900 MB in ...
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0answers
40 views

Is it possible to use memory layers in QGIS processing algorithms?

I am building a QGIS plugin that connects to a MySQL database in the local network, and then adds a subset of one of the tables to an in-memory layer; the subset is based on data currency (only taking ...
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0answers
53 views

Deriving length values from GPX files in QGIS

I’m missing something real obvious and I apologize for revisiting a topic addressed in several Q&A’s here. I’m an experienced GIS user (not programmer) who’s new to QGIS (can’t afford Arc in ...
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0answers
13 views

Using QGIS to create a single # band raster Image [duplicate]

I recently downloaded some Landsat Images. They are in GeoTIFF format. The images are in the different bands. How can I combine them for example if band 1 is Red , band 2 is green and band 3 is blue, ...
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1answer
94 views

Can we avoid using SIP library when writing standalone QGIS python script

I wanted to write a small custom python script using QGIS functionality. So I started with the QGIS documentation on the custom application section. After having some troubles with the import ...
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1answer
43 views

QGIS 2.8.1 Consult a space object and to lead me to a specific folder

Folders display in QGIS clicking on an item. I desire to help me because it is very important. I need you to click on a space object redirect me to a desired folder. Mostrar Carpetas en QGIS al ...
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2answers
90 views

Creating polygons from line segments using PostgreSQL and PostGIS

Is there a PostGIS function that creates polygons from multiple line segments? I want to convert the pictured thirteen lines to four polygons. All lines belong to the table "boundary" (gid, geom). ...
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0answers
36 views

QGis Application Debugging - missing source problem at setScene method in QgsMapCanvas class [closed]

I develop a app in C++ with Qgis components with VS2010 Prof on Windows 7. Compiling a release succeeded and the app´s behaviour is as expected. Nevertheless I would like to take advantage of the ...
2
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1answer
30 views

Multiple ComposerMap items not rendering properly Pyqgis

I am currently trying to put together compositions using inputs from two different map canvases. One is from a canvas built and controlled via a plugin, the other is the the main QGIS canvas (accessed ...
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1answer
48 views

QGIS Numerical Vertex Edit - anyone else finding it doesn't work?

The QGIS Numerical Vertex Edit plug-in used to work fine, but stopped working for me around about QGIS 2.6. I now use QGIS 2.8.1 Windows 64 bit. The plug-in no longer seems able to see points or ...
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0answers
24 views

Progress Bar gets stuck converting Lines to Polygons using QGIS?

I'm trying to convert lines to polygon using QGIS 2.8.1. I use Vector > Geometry Tools > Polygons to Lines. I always get the progress bar stuck on 90%, it can't get to 100%. Could someone ...
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0answers
34 views

QGIS and Intel Tablet Processor Compatibility

Will any Windows based tablet with an intel processor be able to run QGIS, provided it meets the requirements, or is it only the Surface Pro that is capable? Looking for a cheaper solution to the pro. ...
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1answer
75 views

PyQGIS - load PostGIS layer as editable

I can load a PostGIS layer on QGIS' map canvas but "Toggle Editing" button comes "inactive". How can I load vector layer as editable? The code given below loads PostGIS layer on map canvas & ...
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1answer
59 views

Giving line features of same layer different colours

I have one layer and there I have different lines. Imagine these lines are pathes of persons. So image a person x and y. And I now want to differ them by just watching on the different colours of the ...
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0answers
35 views

GRASS GIS r.slope.aspect write errors

I am running into an error running r.slope.aspect I have never seen before. When I run it, I get the following output: r.in.gdal complete. Raster map <dem> created. WARNING: map [slope] - ...
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1answer
56 views

I can't add an img file to QGIS 2.8.1 on Ubuntu 15.04

When I try to add an img file to QGIS 2.8.1 with Ubuntu 15.04 I get this error message: Raster layer: /media/thomsec/D/Nu_Data/world/ocean_floor/age.3.2.img/age.3.2.img is not a supported raster data ...
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1answer
42 views

Create a regular grid of sample points with angle and give them a value

I'm mapping able points to archaeological research. Using QGIS, I need to create a regular grid of sample points, give them a value, specifying spacing and rotation. Better if it results inside a ...
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0answers
25 views

Why are text values ending up in wingdings or something similarly useless?

I have dissolved a layer in QGIS 2.8. The resulting layer has all the column labels and text fields changed to wingdings or something similarly useless. When I look at the layer in ArcGIS, there is no ...
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1answer
20 views

Does Scimap work with QGIS?

Does anybody know if Scimap ( http://www.scimap.org.uk ) works with QGIS? I know it is supposed to operate with ArcGIS and SAGA but as I am very much a beginner with QGIS I would like to know if its ...
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0answers
45 views

How to open none .qgs files in QGIS Wien? [duplicate]

I have tried tried to open my older qgis files made on a mac on my new PC. Wien(2.8) only seems to allow .qgs files so all my folders appears empty when I access them from QGIS on the PC.