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

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2
votes
1answer
11 views

MMQGIS plugin causes QGIS crash while geocoding

When trying to geocode data with MMQGIS pulgin (Google Maps) the QGIS crashes (not responding). I even tried to divide data into smaller sets but it does not help.
2
votes
1answer
12 views

QGIS Legend arrangement

Is it possible to change the legend arrangement so the symbol will be in right side and the label description will be in the left side? The QGIS default is label description in the right side and the ...
0
votes
0answers
4 views

replace records in layer with records form another layer by id and column name QGIS

I have a two polyline layers - one with 2800 rows, the other with 150 rows. Each row has a unique id column. I need to replace the records in one column of the the 2800-row layer with the records ...
0
votes
1answer
12 views

Can I consider QGIS OpenLayer basemaps as WMSs?

I am writing a manuscript about QGIS, and I categorized the data types into 3 classes according to popularity (raster, vector, web-data). Then I separated web-data to WMS and WFS. Under the heading ...
0
votes
0answers
19 views

Can anyone tell me a project (title, materials, resource link) that can help me learn qgis software in depth?

I know this is not a question specific to the software. But I was wondering if anyone can help me find a project that can help learn qgis and gis as a whole as learning from tutorials is quite boring. ...
2
votes
1answer
39 views

How can I create a line in QGIS from multiples lines?

I have some polylines. The origin of every line is the same and I would like to obtain the geometric centre of all the lines represented by a new polyline which must be the centroid of the lines. How ...
0
votes
0answers
8 views

Join Attributes By Location inside QGIS modeler still fails to compute sums

Recently, a question was asked about the spatial join tool, and its failure to calculate the desired data. I ran into the same problem, but none of the solutions that were offered there solved it. ...
1
vote
1answer
19 views

Add lat/lng to Shape File

I'm new to GIS. I have a shape file (shp) that I need to add lat/lng coordinates too. I used QGIS to open the file and selected Processing->ToolBox->QGIS geoalgorithms->Vector geometry ...
0
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0answers
27 views

How to modify the QGIS software?

How can change the word Save when you hover on the saving button in the QGIS software to Saved ?
3
votes
2answers
30 views

How to make a line shapefile converted from a gpx track file display over basemaps such as OpenStreetMap?

I have created a line shapefile from a Garmin gpx track file using QGIS 1.12.3 Lyon. Resultant vector file displays properly with other vector shapefiles. Problem is that created vector file (line ...
0
votes
0answers
13 views

basin creation GRASS vs. flow direction

I have a strange behaviour in QGIS with GRASS tools. I am trying to create basins in the alp region and use he SRTM3 data. As I can see on the flow direction raster the SRTM3 data seems to act nice: ...
1
vote
1answer
23 views

Hydrologically Correct dem Qgis

How to derive a hydrologically correct dem from point shape file using qgis?
11
votes
3answers
1k views

Ortho Projection produces artifacts

I`m trying to create a sphere-like view using qgis and the "world from space"-projection http://spatialreference.org/ref/sr-org/6980/ (essentialy an ortho-projection). ArcGIS wraps the shapes ...
1
vote
2answers
70 views

CRS is not correct, how to define it?

I have the correct coordinates in a excel file, but when I import the file, the point always goes to the wrong place. (I need it in Croatia, and it puts the point in Africa) I've tried chaging CRS ...
4
votes
2answers
215 views

Where to find Documentation for developing QGIS Plugins?

I thought I would try to write a plugin for QGIS (some Python code that I hoped I could easily port) I started following http://www.qgisworkshop.org/html/workshop/plugins_tutorial.html but that turned ...
0
votes
2answers
734 views

How to install QGIS with OpenGeo Suite on Ubuntu

I was wondering how should one install QGIS after installing OpenGeo Suite on Ubuntu Linux? I installed OpenGeo 4.1 on Ubuntu 12.04 following the instructions on the official website ...
5
votes
1answer
54 views

How to build a query/expression to select specific points within a buffer? (in QGIS)

I have a point layer in QGIS. Each point represents a tree and each tree has information about its height as an attribute. I would like to build a query/expression to select all those trees that have ...
2
votes
1answer
129 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
3answers
39 views

Qgis Shapefile Lines contain no data in Attribute Table

I am trying to make a shapefile line contain all the data that the GPX file has. So i load the gpx file into Qgis, (prompts me for tracks, waypoints, trackpoints, routes, etc) When i choose ...
3
votes
1answer
179 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, ...
1
vote
0answers
36 views

Add a Delimited Text Layer in QGIS [duplicate]

Does anyone know how to put manually decimal coordinates in QGIS 2.12.3 Lyon? I have the georeferenced topographic map. I've tried to add feature point and then change the coordinates of the point but ...
2
votes
1answer
56 views

Concatenate values using spatial join in QGIS?

I have a layer (SQLlite) of city lots and would like to accomplish the following: For each city lot, concatenate the list of unique lot id's which are bound within a radius of 30m from the given ...
1
vote
1answer
17 views

export more than one but not all attributes with qgis2web

Using the qgis2web plugin: Is it possible to select more than one but not all attributes to be shown as popup? I can select all attributes or only one attribute to be shown. but not for example two ...
1
vote
0answers
29 views

Building QGIS 2.8.6 on Win 7 32bit?

I'm trying to build QGIS 2.8.6 on Windows 7 32 bit using MSVC Express 10. The build process completes without errors, but with a bunch of warnings. When I run the qgis.exe after installation, it only ...
0
votes
0answers
8 views

module object has no attribute classFactory

I asked this question several days ago on the QGIS developer list but didn't get any love. I'm hoping someone can help me resolve this error. I have a custom repo and a custom plugin that I'm ...
0
votes
0answers
12 views

GRASS unable to download any extension from GRASS Addons

I'm trying to install some add-ons to GRASS, but each time I try to download an addon, I'm getting the same error: g.extension.py extension=v.autokrige ...
2
votes
1answer
18 views

In QGIS combine multiple polygon parts of a single feature

This is a repost of my unsolved QGIS dilema. The image shows a single selected feature that consists of two polygons and the corresponding attribute table. Some nodes of the left poly have been ...
0
votes
0answers
9 views

raster doesn't redraw to fit the canvas after a zoom in and a pan

i am working with qgis 2.8.2, c++ api and qt 4.8.5 i have a layer in the mapcanvas, this layer contains a raster ( a georef tif picture ) when i zoom in, the raster fill the entire canvas , ok but if ...
3
votes
1answer
164 views

How to add a map created in QGIS to a Matlab plot

I am generating a number of plots in Matlab. I want to overlay these over maps I have created in QGIS. I thought the best way would be to import the maps as a geotiff into Matlab and then overlay my ...
1
vote
1answer
12 views

problem with qgsmaptoolpan

i am using the c++ api qgis 2.8.2 i have a strange problem when i want to use the pantool for my canvas i used this code : mpPanTool = new QgsMapToolPan((QgsMapCanvas*)mpMapCanvas); ...
4
votes
1answer
32 views

How to toggle group visibility in QGIS using Python?

I've tried this, but it doesn't work out. root = QgsProject.instance().layerTreeRoot() group1 = root.insertGroup(0, "PGB") legend = i.legendInterface() legend.isGroupVisible(group1) ...
2
votes
2answers
291 views

QGIS Contour plugin: Creating complex isolines leads to isolated areas

I use the contour plugin (v1.1) within QGIS 2.4 to create contour lines. I have streets with different travel costs. I observe problems for streets with low travel costs if they are surrounded by ...
2
votes
1answer
44 views

Getting selected layer name in QGIS Modeler

If I have a geoalgorithm in my model and I want the value from one the parameters, then how can I get it? For example I want the layer name in the parameter layer in below figure so I get the value ...
3
votes
1answer
150 views

What algorithm does QGIS use to calculate Nearest Neighbor Index?

I'm carrying out nearest neighbor analysis on a set of geological features in QGIS, trying to find out whether they're clustered or not. I've calculated the nearest neighbor distances using the ...
0
votes
1answer
46 views

Unable to handle mouse hover in QGIS

I want to get map/layer information (no profile or lat/long) on mouse hover on popup in a QGIS map. I don't know how to do it, please let me know?
4
votes
2answers
1k views

How to correctly install QGIS 2.8.3 with GRASS plugin on Ubuntu 14.04?

I already tried to install QGIS 2.8.3 using the procedure described on: http://www.qgis.org/en/site/forusers/alldownloads.html#debian-ubunt, but grass-plugin do not compare on plugin list! I tried ...
1
vote
0answers
16 views

distributing QGIS via OPSI

Is anyone experienced in distributing QGIS via OPSI (Open PC server integration, http://www.opsi.org/en)? I think this requires an msi package, has anyone built one from the qgis.exe installer?
2
votes
1answer
225 views

How to solve sqlite_rtree_geometry_callback error?

I have just installed qgis 1.8 and it show error message the procedure entry point sqlite3_rtree_geometry_callback could not be located in the dynamic link library sqlite3.dll How to fix ...
1
vote
1answer
40 views

Color gradients to show direction in polylines

I am referring to this very useful hack to change the color gradient of buffered polygons in order to show direction (with a gradient from red to green, for example) hack The only problem is that ...
0
votes
1answer
19 views

Unable to export map in Qgis2leaf

I am trying to make web map with the help of Qgis2leaf plug in. i added all layer to be plot but when i clicked on OK after setting all parameters i am getting Python coding error. Here i am attaching ...
0
votes
1answer
26 views

Error with brush style while working with Qgis2leaf

I am getting following error while working with QGIS2leaf. it saying that QgsSimpleLineSymbolLayerV2' object has no attribute 'brushStyle'. I didn't understand why its coming . Full error what i am ...
1
vote
1answer
33 views

How to quickly change EPSG in QGIS (Openlayers; 4326 vs. 3857)

I'm using Qgis 2.12.2-Lyon on Ubuntu 14.04 LTS. With the OpenLayers plugin I added some OpenLayers to my Canvas. I usually use the WGS 84 (EPSG:4326) projection for my project, but I have to switch ...
1
vote
1answer
52 views

Virtual fields are lost when duplicate layers

I've just upgraded to QGIS 2.12.3 - and hoped that the issue which was really time-consuming in 2.12. <3 could have been solved ... On duplicating layer - with tons of joined tables and virtual ...
2
votes
2answers
67 views

Missing v.in.ogr module of GRASS in QGIS Processing toolbox?

I am a new user to QGIS/GRASS and I am having a problem utilizing GRASS. I have several files that I generated in QGIS that I want to import into GRASS so I can use some of the Grass modules. ...
1
vote
1answer
82 views

Average width of irregular polygons QGIS 2.12.0 Lyon

I'm interested in examining the average width of streets, that are irregular polygons, for a project. I'm using QGIS 2.12.0 Lyon, and have lines (power cables) and Polygons (streets) as layers. For ...
4
votes
3answers
18 views

gdalwarp to geographic coordinate system

I'm getting the folllowing Error when trying to re-project a raster from NAD_1983_Albers to GCS_North_American_1983. I used the proj4 defenition from going to Properties in QGIS of the layer whose ...
6
votes
1answer
3k views

Is it possible to use DotNet to show a QGIS map?

Has anybody ever tried to show and interact with a QGIS map from a DotNet language like C#? What i have in mind is, to write a desktop application with C#, and show an embedded map with the QGIS-API ...
3
votes
0answers
42 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 ...
1
vote
1answer
27 views

Point in Polygon: Aggregation does not work

I'm working with these data: click here. The task is actually pretty simple but somehow it won't work properly. I have a point and a polygon layer. In most polygons there are a couple of points. The ...
2
votes
1answer
40 views

QGIS - PYQGIS Import gpx as vector layer

I'm trying to use the python console to import some gpx files as vector layers. When I do it manually I have to choose which layers to add, my options are: I've tried various versions of the code ...