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

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Creating 3D Geo-Database System with QGIS

Currently I am working on a project to create a Virtual 3D City Model. I have Digital Aerial Photos, Digital Terrain Models, Geo-referenced Thematic Data, 3D Geodata, Digital Architecture Models, and ...
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12 views

QGIS Plugin -> QgsVertexMarker points missing: Anyway to find out which points are not visible?

I am trying to plot live feed of three GPSs running at 10 hz using my own QGIS plugin. I was using QgsRubberband initially which worked fine. I recently added QgsVertexMarker to plot every data points ...
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1answer
63 views

Drawing concentric circles that correspond to free space loss formula?

I want to be able to draw a circle with 50km radius and then fill the circle with values corresponding to the free space loss formula below: FSPL(db)=20 log10(d)+20log10(f)+32.44 for example: a ...
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1answer
44 views

Adding ArcGIS Online Services to QGIS

Looking for info on how to add web mapping services from the Ohio Department of Natural Resources website to QGIS. I've tried nearly a dozen different things online and still can't get results. Don'...
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0answers
20 views

How can I reorder the panel tabs in QGIS

I know I can rearrange the panel tabs by undocking a panel and on redocking it becomes the leftmost tab, but is there a more direct way to re-order the tabs? QGIS 2.12 Lyon Windows 7 64 bit
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2answers
69 views

Drone aerial imagery to QGIS

I used Phantom DJI Standard 3 drone for some aerial photos of an archaeological site. When I view the properties of the jpeg file, it contains Longitude (like this: 22; 14; 37.701258239) and Latitude (...
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1answer
28 views

How to resize a raster SUMMING the values of pixels in QGIS?

I would like to be able to resize a raster such that the values of the resized pixels are based on the SUMS of the original raster pixels, rather than the averages. The output should be generated thus:...
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0answers
13 views

OpenLayers will not show PostGIS layer hosted on Geoserver [duplicate]

I'm new to this. When I try to create an Openlayers map using the Web App Builder in QGIS of a PostGIS layer hosted on Geoserver I get the following error: Server for layer does not support JSONP. ...
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2answers
46 views

Is it possible to arrange multiple attribute tables in tabs in QGIS?

Is it possible to arrange multiple attribute tables in tabs in QGIS? It annoys me that when opening a new attribute table it appears beside the old ones and even shifts other parts of the GUI around ...
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1answer
22 views

how to have french menu/bar in qgis with arabic windows

I have windows 7 in arabic. now I dowload qgis 2.14.3-2 in french. But when I intalled it, it come with arabic menu/tools ... Please how I can have a french menu.
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1answer
31 views

Process MODIS bands on QGIS

I would precess MODIS images on QGIS (in particular swath images MOD09A1). I use MODIS Reprojected Tool Swath to trasform .hdf file in GEOtiff but there are different avaible bands (16) and i don't ...
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14 views

Rescale raster files in QGIS

I want to construct a surface of predictions in QGIS, using several probabilities I otained previously in R, by constructing GLMM. But I rescaled my variables before constructing GLMM, so I also need ...
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1answer
47 views

How to use the QGIS GDAL Toolbox Offset lines?

I try to create a single sided Offset line for a line. I used the GDAL-Tool "Single sided buffer and offset lines for lines" but I fail. The error message says "wrong number of arguments to function ...
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2answers
60 views

How do I convert XYZ coordinates to another projection system

I am trying to convert between coordinate systems in QGIS. I have a point file in NZGD49 coordinates (EPSG:27200) (referenced to the geoid) which I am trying to convert to NZGD2000 coordinates (EPSG:...
2
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1answer
44 views

Why is QGIS project in recent projects greyed out?

When I open QGIS, there are projects which cannot be chosen. They work when I start browser of files and click in directory where the projects are. Are there options to change it?
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1answer
49 views

Reset Python libraries modified by QGIS on Mac OS X to original versions

I am facing problems in python after installing QGIS. While installing QGIS, it mentioned that it would override my matplotlib and numpy python libraries. I am facing trouble with executing python ...
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1answer
28 views

Attribute Table [closed]

I have geological data in shape-file, I do not know which data to open and how from attribute table in QGIS. I need just a map but I do not have an experiences with GIS.
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1answer
42 views

Showing years 1995-2000 in “Select features using expression” in QGIS

I have an attribute table that shows states, years, and other specific things of that state in that year. How do I create an expression (so I can export a shapefile with these selected features) that:...
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1answer
93 views

QGIS 2.16 GRASS geoalgorithms don't work?

I have problem again almost like version QGIS 2.14. I did not solve the problem. QGIS 2.14 GRASS geoalgorithms don't work? I install C:\MinGW and now QGIS grass geoalgorithms don't work? There is ...
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23 views

Land cover generation

I am working on a river watershed on QGIS and I need a land cover map. I have a good raster of land use data with 15 m resolution for year 2015, but it covers around the 90 % of the basin. I have ...
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1answer
54 views

How to build Final Web App from QGIS Web App Builder

I have used Web App Builder plugin from Boundless to build web app,but the app only shows in browser when i Click |Preview|. App created using |Create App| does not open up in browser. It says |Build ...
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1answer
39 views

How do I get a specific scale/zoom level in the QGIS canvas?

I have a map project with CRS = NAD83 zone 13N. The canvas will zoom to 1:144,447, 1:288,295, 1:577,790, etc. The values in the dropdown, on the other hand are 1:100,000, 1:250,000, 1:500,000, etc. ...
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0answers
33 views

issues in table reading from MS Access using ODBC

I want to add two tables from my MS Access db. So I follow the procedure to add ODBC (add vector layer, database, etc.) and it works. I choose the tables that I want to add and hit ok. Qgis adds both ...
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1answer
52 views

How to Format QGIS Field names on Editor Form

I am using PostGIS table in QGIS with custom QGISFieldWidgetFactory. However, I wanted to rename the field names in QGIS Edit Form from say first_name to First Name using Python. Currently, I was able ...
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0answers
54 views

polygon/polyline digitizing techniques for geological data

My current work involves extensive digitising of historic geology data - essentially the creation of new polygons and polylines based on overlain raster and vector layers. This is all done manually ...
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1answer
33 views

QGIS OpenLayer OSM plugin not matching with my imported GIS information

I have imported GIS data into a new Qgis project for our local city website. The files are shapefiles and inside the prj it shows: PROJCS["NAD_1983_StatePlane_Florida_East_FIPS_0901_Feet",GEOGCS["...
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29 views

How to create one shapefile between 2000-2010

I have different deforestation shapefiles for Amazon region for each year 2000, 2001, 2002, 2003 etc. until 2010. I want to create a new shapefile that will show the data just between 2000-2010 in ...
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1answer
24 views

importing files from grass mapset to QGIS Layer Panel

I am performing an NDVI calculation against 2 sets of rasters. One produced by LANDSAT5 the other by LANDSAT8. r.mapcalc "L8_NDVI = float(L8Band5 - L8Band4) / (L8Band5 + L8Band4)" The L8_NDVI file ...
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0answers
34 views

Problems importing .kml to QGIS

I save a coordinate in google earth as a kml file and try to open as a vector layer in QGIS but I can´t see anything. I have already checked the projection but it seems fine. If I try to see the ...
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1answer
24 views

segfault on exit when map layer has connection to “layerRemoved”

Here's my sample code that shows the problem - apologies if this is a big load of code but this is as minimal as I can get it: import sys from qgis.core import * from qgis.gui import * from PyQt4....
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1answer
29 views

Exporting CSV to shapefile in QGIS? [duplicate]

I have a simple CSV of {lat,lon,text} and I want to export it as a WGS84 Shapefile. How can I achieve this?
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27 views

Rasterize in QGIS using point as centroid (not vertex)

I'm attempting to make the full switch from ArcGIS to QGIS, but there are a few snags I'm hitting along the way, one of which is in the GDAL "Rasterize" function. My process goes like this: I have a ...
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0answers
19 views

Can a table (.dbf) be encoded in two different systems?

I am having a *.dbf-file. When I load it into QGIS (delimited text-file) I am having trouble getting all the characters right. Either I load it in encoding=windows-1252 - then the headers will be ...
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3answers
72 views

Why is the Globe plugin missing in QGIS 2.17.0 master?

It seems that the 'Globe' plugin is missing in QGIS 2.17.0 master. Is this a bug or is there something I'm doing wrong:
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1answer
30 views

How to determine when the map has finished rendering

I have written a few functions to compare QGIS performance to MapInfo. Most of them involve doing some analysis then dumping the results on the map, as such the process would be considered 'finished' ...
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0answers
15 views

Click to copy Co-ordinates From QGIS

I have a created some point data using CRS ESPG:4326 and added Google basemap from Open-layers plugin. While adding the Google maps imagery i have changed CRS to ESPG:3857 in project properties. ...
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3answers
64 views

QGIS CSV import of percentage values

I have a CSV file with four columns. The first column is text, and the succeeding columns are percentages. I have set up a csvt file with "String", "Integer", "Integer", "Integer" When I import the ...
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1answer
29 views

C-based implementation of Djikstra's or Fast Marching for QGIS/Python?

I need an algorithm to find least cost paths between points on a discrete grid, allowing for the direction of transport to affect the cost of transport, allowing for different modes of ...
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0answers
24 views

Orfeo Toolbox Python scripting problem

I am working with QGIS and the OTB plugin (Orfeo Toolbox). I trained the SVM classifier by "hand" (mouse clicks) and it worked. Then I tried to do it with python scripting, because I have a lot of ...
2
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3answers
313 views

QGIS 2.16 “Nødebo” libintl-8.dll missing

I have some trouble to get the QGIS 2.16 32-bit installation working on a 64-bit Windows 7 machine. When the installation is finished and I hit the QGIS Desktop 2.16.0 icon the next error pops up: "...
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0answers
44 views

QGIS 2.16 - Missing menu Vector > Research Tools > Vector Grid [duplicate]

I just upgraded to QGIS 2.16 on Xubuntu Ubuntu 14.04.4 and I'm missing the "Research Tools" under the Vector menu. I'm specifically looking for the Vector Grid option. I didn't notice any error ...
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0answers
12 views

can't' fix error c2001: new line in constant

I am compiling qgis_core and get the following error. please help me. qgisunittypes.cpp : QString QgsUnitTypes::formatAngle( double angle, int decimals, QgsUnitTypes::AngleUnit unit ) unitLabel = ...
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1answer
28 views

How to enable “Label every part of multi-features” with pyQGIS?

Regarding the 'Label every part of multi-features' check box located in the 'Labels // Rendering // Feature Options' layer properties UI... Can this be done with pyQGIS? These two commands enable ...
2
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1answer
27 views

QGIS 2.14.4 attribute table fields not visible in Statist plugin

I had one point shapefile to which I joined new numerical attributes by a csv text file. I saved it by right clicking and everything works fine, I use it for calculations etc. But when I use the "...
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0answers
23 views

Topological Editing of Two different layers in QGIS

Is there a way to apply topological editing to move vertices between two coincident features that are not the same feature? For example, if I have a crop land polygon coincident with a soil polygon ...
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0answers
23 views

QGIS crashing when trying to open PostGIS layer

I'm trying to open a fairly large dataset from a postgres database in QGIS. The table contains over 100 million rows, and it about 60gb in size. When I try to open this table in QGIS (have tried 2.8 ...
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1answer
29 views

How to combine two *.qml files in one?

I am making a plugin. I have two qml files for same layer and column. I want it to combine into new qml file and then I will select which one symbol for each value I want. But the problem is, I don't ...
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5answers
459 views

Missing Processing Tools in Vector Menu - QGIS 2.16

I'm missing all the usual processing tools in the Vector menu in QGIS 2.16 (eg vector overlay, analysis, etc). They do appear in the processing toolbox but there's no sign of them in the Vector menu. ...
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1answer
26 views

Are degree based length/area measures comparable across regions?

I have global shp files of basins (polygons) and rivers (lines). I wish to calculate a measure of stream length per basin area. It should be comparable across world regions, e.g. I wish to compare ...
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0answers
16 views

Problem in cell dimension assignment from “save as” in QGIS

I am trying to save one raster in QGIS by changing the cell dimensions. I select 30 x 30 as cell resolution, but then the output raster has a resolution of 29.9985 x 29.9985. How can I assign exactly ...