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

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2
votes
0answers
113 views

QGIS - Semi-Automatic Classification Plugin v.4.9.5 - When trying to create ROI getting Error[43]: Attribute table error

when I try to create a ROI within the Plugin: Semi-Automatic Classification Plugin, I am getting the Error: Attribute table error. Which means it is not creating MC ID / MC Info or C ID / C Info in ...
2
votes
2answers
38 views

Assign predefined legend style to raster layer via qml in QGIS [closed]

I work with rasterized extracts of CORINE data (V 18.5 gdb) in QGis. My layers however are not depicted in the colours that are standard for CORINE, but in different shades of red. From EEA i ...
1
vote
0answers
13 views

Intersect raster or laz (pointcloud) with vector polygons

I am a vector trained GIS person and wish to add the value of a pointcloud to my vector data. A friend of mine suggested cloudcompare but said it was also possible using my beloved QGIS. I work with ...
3
votes
1answer
47 views

One attribute category defines colour, another attribute category defines shape

I want to set the point colour to be defined by one attribute (Lithology), and the shape to be defined by another attribute (Qualifier). For example, Lithology (RH) = Yellow, Qualifier (CR) = Square,...
2
votes
1answer
47 views

How make polygons from lines (polyline to polygon) in QGIS 2.14.3

I'm trying to remember how to do polygons from lines, I remember it was a very simple procedure. have a layer of lines intersecting or touching, use the tool and voila, qgis took the lines layer and ...
0
votes
1answer
35 views

changing projection hides raster

I have a map georeferenced in georeferecer plugin in QGIS. I have loaded it in qgis. It shows strangely (wrong aspect ratio than I expect). I am changing projection (bottom right "OTF" projection) ...
1
vote
0answers
36 views

QGIS: georeferencer, resolution-dependent behaviour, why resolution is negative

I am trying to georeference sovet military maps from maps.vlasenko.net. I have manage with one, but to my surprise I am failing badly with georeferencing a second file (M33-3 map). Let me go piece ...
1
vote
1answer
18 views

How can I get QGIS Plugins to work through the proxy internet settings?

For QGIS on my work computer, I add in the appropriate information under Settings - Network - Proxy. This allows me to access plugin repositories, but sometimes plugins do not work. I would get '...
2
votes
0answers
43 views

PyQgis does not load a vector layer to form

I will want create "Hello World" project at PyQgis. I will want to show map on form.ui from .shp-file, but it does not download and show. But it is not loaded and does not appear. It`s value ...
1
vote
0answers
27 views

Save rule based lables to new attribute in QGIS

Is it possible to save/export rule based lables in QGIS to a new attribute?
3
votes
2answers
123 views

Attribute table : How to select more then one feature?

I have a vector layer: ROADS that is composed of different types of roads: primary, secondary, tertiary, trunk, etc. When I right click on the layer ROADS and I go to Attribute table -> Select by ...
1
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0answers
25 views

QGIS Lost precision when converting raster to vector

I am after running ordinary kriging, converting raster to vector I lose decimal value and only get whole number. I have added first the raster then the vector image.
1
vote
1answer
48 views

Why are there my_form_open() Python functions in my QGIS project file?

I have a project open with 6 layers (MapInfo .tab format), have set the style for each layer and added labels for 1 of them. So for a simple project the .qgs file is about 2000 lines long and among ...
1
vote
0answers
47 views

Understanding QGIS project files [duplicate]

I'm a GIS software developer, I've been working predominantly with MapInfo over the last year or so but have now been tasked with assessing QGIS to see if we can perform the same tasks we've developed ...
1
vote
2answers
53 views

Point Click for Coordinates - Stand Alone QGIS in Python

I am implementing a stand alone version of the answer to this question > How to programatically check for a mouse click in QGIS My code is below. The code compiles without error, and the toolbar ...
2
votes
1answer
50 views

How to create a QgsFeature with default attributes?

I have a polygon layer loaded from POSTGIS database. This layer has a default value for the first column. I can create a new feature set that attribute to some predefined value with newFeature = ...
1
vote
0answers
26 views

QGIS Batch Processing error: AttributeError: 'NoneType' object has no attribute 'update'

I receive the following below error when trying to run Batch Processing in QGIS. I have tried uninstalling QGIS but still this problem persists. An error has occurred while executing Python code: ...
2
votes
1answer
32 views

How can i add coordinates of Polygon nodes on a Polygon data table?

I'm new in this domain and I want to know if I can add to data table of a Polygon.shp, coordinates of node. I have this table pkuid/ name_poly/ area/ lenght/ (here nr_point ex:1,2,3,4 it' about order/ ...
2
votes
1answer
69 views

How to select points with MINIMUM distance of 10 km from a vector line in a country?

Let's do it simple: I have a huge amount of points and some lines in my QGIS map. I want to do a selection just of those points that are minimum 10 km far from the line. Any idea? (I have no ...
1
vote
0answers
20 views

HDF5 files in QGIS

I am working with GPM GMI precipitation data that is stored in the hdf5 data format. All I am trying to do is import and visualize the data in the QGIS environment. I can import the precipitation file ...
0
votes
1answer
29 views

Installing QGIS-Server on Ubuntu 14 (64-Bit AWS EC2 Instance), /cgi-bin/ doesn't work

I've been trying to install qgis-server (2.14) on Ubuntu 14 (64-bit) using instructions from the the qgis-server installation instructions and tips from this question. All the packages install, I can ...
4
votes
1answer
104 views

v.kernel is missing under Processing Toolbox GRASS GIS 7 commands

I installed the QGIS Standalone Installer Version 2.14 (64bit), that automatically contains GRASS 7.0.4. I created a map with several layers and rasters in the program called QGIS Desktop 2.14.3 with ...
1
vote
2answers
49 views

Speeding up (automating) QGIS georeferencing process?

I georeference a lot of maps with QGis using a combination of visible street intersections on paper maps and right clicking on those intersections inside of maps.google.com and clicking "what's here?",...
1
vote
0answers
31 views

Find and filter points within a variable radius

I have a set of projected spatial points (x,y,id,dist,value) that needs to be filtered. For each point I have to find the other ones falling within a variable distance. For each selection, I need only ...
3
votes
1answer
74 views

get log of internal functions called by qgis

Is there a way to know which internal python functions are used by QGIS? e.g., when I click on "add vector layer" button I would like to know the functions that are called by QGIS. It would simplify ...
2
votes
1answer
28 views

Load postgis vectorlayer with AuthConfigId

I've tried to add a postgis-vector-layer in qgis 2.14.0 by using authentication (authConfigId) and PyQGIS. When running the script I'm asked to login by username/password instead of using ...
1
vote
1answer
48 views

How to filter out layers with QgsMapLayerComboBox?

I am using Qt Designer 4.8.5 to develop a plugin (with QGIS 2.14.3-Essen). I recently started to use QgsMapLayerComboBox widgets instead of the conventional Combo Box widget. However, I want to ...
3
votes
1answer
65 views

Add field and calculate expression with PyQGIS

I want to use PyQGIS to add a new field and calculate the values for each feature. Similar to Field Calculator option. My 'Field Calculator' expression is for example: y(start_point($geometry)) from ...
1
vote
0answers
28 views

coordinate returned by xyCoordinate signal is different

I am working on a project based on the api qgis 2.8 and qt 4.8.5 I have two computer one with the qgis 2.8.1 and the other with the qgis 2.8.3 In my application I have a connect to the signal ...
0
votes
0answers
26 views

Files added using *.qlr result in bad layer after save and reload

I'm converting CAD to Shape (separate point, line and area shapes per *.dwg in a folder). In the process I parse the shape info to a donor *.qlr (to the same folder). The qlr is a donor file with ...
1
vote
0answers
27 views

Qgis standalone script using eclipse IDE -No data provider available issue

I know, the question is asked few times also in this forum but i apply already the presented solutions without any chance to fix the problem. In General the source code looks like the following: from ...
3
votes
0answers
80 views

Error on running Saga GIS inside QGIS

I have installed QGIS (2.14.3-Essen) along with SAGA GIS (Version: 2.2.7) in Ubuntu (14.04 trusty). I am trying to fill the sinks in a DEM in QGIS processing using SAGA provider. I have used both the ...
2
votes
0answers
51 views

QGIS on Amazon cloud computing?

I have a QGIS (2.14.3) viewshed analysis that is taking too long to run on my desktop computer. Is it possible to run QGIS on the Amazon cloud computing (or some other similar service) to speed up ...
1
vote
1answer
35 views

QGIS Attributes null after copy paste

I have QGIS 2.14. I opened a .shp file (with dbf etc) and selected a few features. Created a new QGIS project and pasted features as new Vector Layer. The attributes table was created ...
0
votes
0answers
40 views

Creating curved lines between two points in QGIS

I am trying to create curved lines between two point in QGIS. There are a few posts that show how to create these lines (hyperlinks below). However, I am having trouble executing the code in QGIS. ...
1
vote
1answer
45 views

Import dxf file with QGIS

I use "add vector layer" to import my dxf file in QGIS. But, when I open the attributes tables of the layers (point, polyligne, polygone), I see that the majority of the attributes (color, ...) of the ...
2
votes
1answer
46 views

QGIS Tile Layers Plugin crashing when adding custom map

I am trying to add a base map to QGIS using the TileLayerPlugin. However, whenever I execute the plugin QGIS crashes. Specifically, I am trying to add this basemap to QGIS. I created a .tsv file in ...
1
vote
1answer
44 views

Why is QGIS 2.14 automatically changing field type when saving layer?

I'm creating shapefiles with specific field types (i.e. ID: integer, NAME: String, CODE: integer, etc.) using QGIS 2.14.0. When I save the layer using "right-click" - "save as" and load the newly ...
2
votes
1answer
59 views

Adding CartoDB basemap to QGIS

I am trying to add a CartoDB basemap to QGIS and am 1) trying to figure out if it is possible and 2) trying to figure out how to do it. I've installed the QGIS CartoDB plug-in and have connected to ...
1
vote
1answer
34 views

Using difference/clip tools in QGIS without it creating blank layer?

I am using QGIS in an effort to find addresses without municipal water in arkansas. I have a polygon layer of Arkansas public water systems as well as a point layer of arkansas residencies. I ...
1
vote
1answer
34 views

How to reassign Raster values to new values in QGIS?

For example, if the Raster has integer values ranging from -1 to 3 and the value that I am only interested in is 3, I then want to assign values -1 to 2 to 0 and then have the 3 value set to the value ...
1
vote
1answer
54 views

How can I add output vector to a list to loop a geoprocessing on it?

I have about 18000 circular buffers that I want to transform in some kind of a wind rose. To do this, I transform the buffer polygons to lines, create points along the lines on the wind directions ...
1
vote
0answers
42 views

Grib file information to create QGIS projection

I'm trying to create a specific projection with QGIS (something like that: +proj=lcc +lat_1=69.75 +lat_2=52.87 +lat_0=61.31 +lon_0=7.665 +x_0=0 +y_0=720 +ellps=GRS80 +units=m +no_defs). I have some ...
2
votes
1answer
34 views

How to use create a plugin that contains a set of processing scripts using Qgis Script feature?

I have some script that I would like to share easily. I have read here that its possible to create a plugin using a set of scripts using "Scripts/Tools group in the Processing toolbox, double-click ...
1
vote
1answer
111 views

Regrouping points together qgis based on a sum

I work with QGIS and Python. I have a vector layer containing points. Each point has an attribute called 'number of houses' I want to dissolve this vector layer in many areas, each area must contain ...
4
votes
1answer
64 views

Calculating distance between points of the same layer

I am using QGIS 2.13 and a layer with hundreds of points. I need to calculate the distance to the nearest point... in the same layer. I tried the distance matrix but I get 0m since the "closest" point ...
2
votes
0answers
57 views

Raster Catalog QGIS; performance

Is there a comfortable way to generate efficient raster catalogs (such as in Arcgis), where polygon tiles are loaded as long as the scale does not hit a threshold value and images are only loaded when ...
5
votes
2answers
155 views

QGIS symbology: Change border color without loosing fill pattern

I have defined a layer symbology like shown in the screenshot below (categories are applicable laws however). The layer symbology is defined like this i.e. (no pattern fill): For these three ...
3
votes
0answers
50 views

Multiple watershed delination with QGIS

I am trying to divide a DTM model in subbasins but I have set specific outlet points for the subbasins, and not to use a thershold. Is there a tool similar to r.water.outlet but with multiple outlet ...
2
votes
0answers
37 views

select living-end-streets from a local osm-road-extract with QGIS

I am looking for a method or query to select living-end-streets from a local osm-road-extract. Living-end-streets are dead-end-streets for cars but cyclists and pedestrians can continue on their way. ...