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

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2
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1answer
48 views

Disable Panels at Startup from Custom Config Location

I'm trying to start QGIS 2.8 with the minimal GUI possible so I can reskin QGIS for a custom plugin. Unfortunately I'm not able to get rid of the Layers and Overview panels when saving the ...
2
votes
1answer
86 views

Adding multiple plugins to custom menu in QGIS

I am new to Python and QGIS and attempting to create some plugins to replicate in-house tools used in other GIS programs. I have added a custom menu using Python and added the plugin to the menu using ...
2
votes
2answers
103 views

Points that get created in the wrong order when using e.g. QChainage?

I have a polyline layer (road) that I want to use to get a point layer with 1 km between the points. I have tried both 'QChainage' and 'Locate points along lines' to do this. They both work, I get ...
2
votes
1answer
144 views

Loading layer from ComboBox in QGIS?

I made a plugin what has multiple combobox but i have problem with the information load from the second combobox it depends on the combobox 1st. In the first combo box, i can choose layers from the ...
2
votes
1answer
67 views

Styling line layer based on two attributes in QGIS ? (1 discrete and 1 continuous)

I have found a really helpful tutorial to style points based on two attributes. Is it possible to make style lines based on two attributes? I have a shapefile with streets that have two attributes: ...
2
votes
1answer
133 views

How to extract coordinates from a raster in QGIS

I have the Harmonised Global Soil Database in raster format (tif). I want to extract the coordinates (cell centres in lon/lat) along with the field value in order to link them with the soil data ...
2
votes
1answer
70 views

Reproducing GRASS GIS network analysis tutorial in QGIS Field Calculator

Im looking to reproduce the assigning of road speeds as denoted in a GRASS GIS tutorial (v.net.alloc tutorial), where the road speed is assigned by road type (i.e. 'interstate' = 75 mph etc.) to then ...
2
votes
1answer
96 views

How to fix: update of view in private qgis.db failed error

After a change in permissions, I started to get this error message: Update of view in private qgis.db failed. table vw_srs already exists I know that changing the ownership of the db or deleting ...
2
votes
1answer
62 views

Is it possible to inject a value into an algorithm text setting in QGIS Processing Model?

I have a SAGA Raster Calculator algorithm inside a model that I'm building. For the formula, I'm using the function (g1>20)*1 to give me a binary raster output. This categorises pixels to ...
2
votes
1answer
352 views

Need File Geodatabase (*.gdb) read/write support in QGIS?

I have followed the instructions shown in this thread but still don't have the ESRI FileGDB option only the Open File GDB. In my case, I am in the most current QGIS version - Lyon (2.12.0). ...
2
votes
2answers
115 views

Seg Faults and Instantiation Errors while running PyQGIS on OS X

I'm having issues getting off the ground with running PyQGIS on my OS X. I'm frankly very confused as some errors occur sporadically while executing the same code. When I try the following: ...
2
votes
1answer
94 views

Combine digital elevation model (DEM) with point layer (QGIS)

I have two layers: The first one is a digital elevation model (DEM) as GeoTiff. The second is a point vector layer (start and end of street segments). What I want to do: Add elevation information ...
2
votes
1answer
56 views

QGIS Georeferencer returning blank output

I cannot get QGIS's (2.8.2 Wein/Win 7) georeferencer to work for the life of me. I select points, set the CRS, run the function, http://i.imgur.com/lsQUOU3.jpg and the output looks like this. ...
2
votes
1answer
64 views

Issue rendering polygons at global scale when using the Robinson coordinate reference system in QGIS 2.10

I am trying to create a map using the Robinson coordinate reference system (EPSG:54030) in QGIS 2.10, on Mac. I used the 'on the fly projection' feature in the Project Properties. My base layer is a ...
2
votes
1answer
71 views

How to delete raster value using QGIS?

I would like to delete several values as they are equal to zero. In my example, 0 -5 - 6 - 7 - 8 ... I couldn't find an answer on the internet.
2
votes
1answer
42 views

Clip error with QGIS - idles without finishing

I need help troubleshooting a problem using the Clip tool with QGIS 2.8.1 Wien. When I try to use the tool, it just sits there idling and never finishes. I've let this run for hours and there hasn't ...
2
votes
1answer
64 views

Creating a CSV with Irish Grid references and opening the points in QGIS

I have a load of Irish grid references that I need to create a map of in Ireland - any advice? Tried to input a couple of refs and open in Biological record tool thinking this would be simple but hey ...
2
votes
3answers
61 views

Keeping my own additional Python layer information for potential further usage in QGIS

I wrote a plugin that selectively loads simulation data to QGIS. That works fine, but the overhead to convert the data from my own format to QGIS takes a long time, as I have to generate an index and ...
2
votes
2answers
133 views

QGIS Web Client - postgreSQL Layers wouldn't shown

since updating my QGIS to version 2.8.3 the postgreSQL Layers wouldn't shown in the QGIS web client. In the Desktop version the project works very well I only can see the projecttitle and the groups ...
2
votes
1answer
194 views

Error memory on Viewshed Analysis plugin QGIS [duplicate]

My question is exactly the same as TTome! (Viewshed analysis plugin on QGIS keeps resulting in errors) "I've been trying to test the Viewshed analysis plugin on QGIS 2.10, but it keeps giving back ...
2
votes
1answer
64 views

OpenStreetMap heavily pixellated when loaded in QGIS and standalone application

I am loading an OSM street map into an application I am building. I load it as a raster layer via an XML document with the OSM GDAL data. My problem is that the map appears heavily mangled and ...
2
votes
1answer
59 views

Reprojecting Points, Shapes and Rasters using QGIS?

I have a project file that had originally started out with no care to the actual coordinates (we were just using an aerial and displaying the shapes and points on said aerial). Now, I am trying to ...
2
votes
1answer
121 views

Set label transparency in PyQGIS

I have been trying to figure out how to set the transparency of my labels and label buffers in PyQGIS for an application I am building. I am using the "setCustomProperty" class from the QGIS API. I ...
2
votes
1answer
140 views

How to prevent markers overlaping other markers on map using QGIS 2.2.0

I have points with similar coordinates and displaying them on a map of Latvia they overlapping. How can I display all the points using QGIS 2.2.0 like in Finnish map?
2
votes
1answer
48 views

label a shapefile from command line

I have a SHP file and a DBF file that has an attribute table with a column for elevation. Through command line how can I make this these elevations visible when I view the shape file? I would ...
2
votes
1answer
143 views

How to connect input parameter to the field calculator algorithm within the graphical modeler?

I am building a model in the graphical modeler of QGIS 2.8.1 Wien and I would like to give the option to the user to enter a number in the model with which a selected field will be multiplied, but I ...
2
votes
1answer
32 views

Using Join, Merge, Dissolve in QGIS?

I am new to QGIS. I have two layers: Layer A: Large polygons joining areas, lets call them countries. Layer B: Smaller polygons(States) containing population count data within the large ...
2
votes
2answers
64 views

Geoserver - How to restrict only a layer instead of giving the whole service?

Scenario(example): I have a database called MYDB linked to geoserver. In geoserver i have a workspace called A where A has a store connect to my MYDB. In section layers i published 4 layers called ...
2
votes
1answer
60 views

Merging more than 9 input files with lasmerge?

Is there a possibility to feed more than 9 LAS files to lasmerge tool? The user interface only allows 9 LAS files from LAStools toolboxes in QGIS or ArcGIS, but at liblas.org it’s described as there ...
2
votes
1answer
53 views

Strategies for grouping polygons

I'm looking for strategies to replicate the functionality available via ArcGIS' "Aggregate Polygons" tool. This is different from a straight dissolve on the polygons - the operation has to fill in ...
2
votes
1answer
113 views

QGIS:joinattributesbylocation gives empty shapefiles and QGIS:joinbylocation does not give summary of all fields

I am trying to make a spatial join to calculate the mean value of many variables (100+ columns) of census tracts by city. In order to do that, I would, in QGIS Desktop, run a spatial join (join ...
2
votes
2answers
239 views

QGIS 2.10.1 Clipping Algorithm Results In Empty Layer

I apologize for the redundancy of this issue, but I have explored all the information I could find over the past couple days and have yet to find a solution to what seems to be a very simple task. I ...
2
votes
1answer
105 views

Calculating percentage using QGIS Field Calculator?

I have a shapefile containing counties and their respective population for a given area. I woould like to use the Field Calculator to create a new field that contained the % of the total population in ...
2
votes
1answer
49 views

How to combine a road network to multiple shapefiles with no shared attributes

I am trying to create an agent-based model and I need a .CSV file that contains the attributes of a routable road network and a number of other shapefiles I have. I have the following: Ordnance ...
2
votes
2answers
115 views

Identifying number of overlapping polygons in QGIS?

i'm looking for a possibility in QGIS to identify the intersecting parts in one single polygon layer with ten features, where at least four polygons overlap.
2
votes
1answer
140 views

Merge 2 SpatiaLite layers into one

I pretty new to database, so the question could sound simple. I have a SpatiaLite database with some multipolygon layers loaded. What I would like to do is to merge (not dissolve) 2 layers into 1. ...
2
votes
1answer
54 views

Moving circle using QGIS?

Using QGIS 2.2, I want to move a circle from one specific point to another specific point: How can i grab the exact center of the circle and move it to another location without creating points in the ...
2
votes
1answer
101 views

How can a get OSM data in QGIS in a way that shows the direction of a road as it would in JOSM?

I am trying to download OSM data into QGIS in a way that is as close as possible to what it looks like in JOSM. I am doing a visual comparison between OSM data and satellite images. One of the things ...
2
votes
1answer
163 views

How to count the number of pixels with a specific value of a .gif file in QGIS

So I have this .gif file that has values from 0-255 but not entirely grayscale. I tried the r.report and it does not work. I also tried the raster calculator like: "myraster@1"= 1 (because I want to ...
2
votes
1answer
219 views

QGIS export to OpenLayers Python Error

I am trying to export a map with several Shapefiles from QGIS to an OpenLayers webmap. For that I tryed the "Export to Open Layers" and the "qgis2web" (Version 0.23.0) Plugin. I tried it before (one ...
2
votes
1answer
94 views

How can I add a Raster Calculator tool on QGIS Processing Modeler?

I'm trying to add the Raster Calculator to a model I'm creating using the Processing Modeler of QGIS 2.6 Brighton. It does not allow me to add the normal Raster Calculator tool under Raster, so I ...
2
votes
2answers
116 views

Adding elevation data from contour lines to point layer using QGIS?

I want to calculate the number of vacant lots within 300m from a given building. My source file contains point layers of buildings and vacant lots. Here's a short description of my workflow. I've ...
2
votes
1answer
297 views

Shapefile/vector layer not appearing in QGIS

I have a shapefile (calling it 'new.shp' for discussion's sake) that won't show up with other layers. If a fresh file is started and I bring in new.shp, it will appear, but any other layers imported ...
2
votes
1answer
125 views

Problem with Distance Matrix in Qgis 2.83

I want to calculate the distance of archaeological sites to the nearest river. Following this question Calculating the minimum distance between points and polygons in QGIS I extracted the nodes of ...
2
votes
1answer
150 views

Grid or True North In QGIS

With Qgis general settings and changing nothing on the preferences window, which north system (true north or grid north) will be activated ? Would it be determined by selection datum, for instance ...
2
votes
1answer
54 views

Plotting points on a map based on address text string of location

This may be a naive question, but I'll try anyway. I am working in QGIS, and I have a shape file with more than 2000 rows containing information about specific trees in a botanical garden; their ...
2
votes
2answers
144 views

How to visualize updating lines of bearing from a point

I'm working on a project where I need to visualize a constantly updating line of bearing from a point, based on degree of rotation around that point. My plan is to design a line feature with an ...
2
votes
1answer
104 views

Create points symbology with more than one parameter

In QGIS i would like to create symbology for points layer where the symbology will take into account more than one parameter (currently two). i.e.: My points layer has street names and house numbers ...
2
votes
1answer
44 views

I tried to run QGIS using python but I couldn't get any output on screen?

uri ="C:/Users/rajagopalv/Desktop/poi_sunnyvale.csvdelimiter=%s&xField=%s&yField=%s" % ("|", "x", "y") vlayer = QgsVectorLayer(uri, "address_sunny", "delimitedtext") ...
2
votes
1answer
107 views

Export QGIS map for Google Map

I made a superbe map with QGIS that I really would like to export in Google map format (Zoom/X/Y.png). I search everywhere and no comfortable answer was found. For now, I am making a map using ...