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

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1
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0answers
23 views

QGIS 2.16.0 - issues with styles and rearranging attribute table columns

I'm finding QGIS 2.16.0 is not honouring attribute table column order once saved styles are applied to tables edited using Table Manager/Refactor field. E.g a new column will shift to the far right in ...
0
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1answer
15 views

GRASS dependecies issues in Windows QGIS (i.vi for instance)

I have QGIS (2.14.3) and GRASS (7.0.4) desktop installed on windows 7 and have successfully installed the "GRASS" plugin in QGIS (using plugin manager). However, some of the GRASS dependencies, such ...
1
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0answers
59 views

Removing white border of polygons using QGIS? [duplicate]

I use the graduated color style for the polygons. But there are white borders between polygons. I tried to set Border: transparant, Border stype: No pen, Border width: 0. It did not work. I found a ...
12
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2answers
3k views

What is the difference between != NULL and IS NOT NULL?

I have a shape layer with an attribute containing NULL values to which I would like to apply a filter for values different from NULL. Using the available gui for such query construction, one would ...
1
vote
1answer
28 views

How to quickly add a DWG with multiple layers?

In QGIS 2.14 "Essen", I need to add a DWG with multiple layers. So I choose "add vector layer" feature in QGIS 2.0 to import the .dwg/.dxf file. However, QGIS adds all layers from the DWG file ...
1
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0answers
18 views

Grid Reference autotext expression

I am trying to create some extremely user friendly print composer templates that have an awful lot of autotext data that updates for each composer without having to manually type it in. I ave done ...
0
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1answer
32 views

How to add legend to rasterlayer in Qgis2Web plugin while exporting maps?

Is it possible to add a legend for Rasterlayer directly from the Qgis2Web Plugin or do I need to add the code manually? I added an image of an example (DEM raster) and a Vector Layer. It doesnt ...
1
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0answers
30 views

How to move projects from a server to local hard disk or removable drive?

I have a QGIS project on a desktop that I need to move to a laptop to take into the field. Whilst in the office, both PCs talk to the project on server via a persistent mapped drive (L:) - ie. ...
0
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0answers
19 views

Getting HTML webpage into QGIS layers panel

I have created a webpage that capture information from heremaps and write to DB using Heremaps API and PHP. How do i run this webpage into QGIS like other WMS or WFS and do the same mechanism which it ...
1
vote
0answers
30 views

Is there a way to have custom functions automatically load in QGIS on start up?

I have a custom function for the print composer that prints out copyrights, but every time I start QGIS up and go to the Print Composer for the first time, I have to the Insert Expression > Function ...
0
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0answers
21 views

Add attribute column with road's altitude [duplicate]

I have some vector layers with a set of latitude and longitude coordinates.Is it possible to add a new column to the attributes table containing the altitudes of the road? (the data was collected ...
1
vote
1answer
33 views

GDAL Raster plugin doesn't work

I am connected to Oracle, using QGIS and can see the vector data table. I am trying to use the GDAL Raster plugin to view raster data, in QGIS. When I click on the Oracle GeoRaster plugin, get a ...
2
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0answers
33 views

Three-Dimensional Routing

I have created a route by hand using the Tracing Tool available in QGIS, placing the waypoint on top of an Open Street Map layer. I wanted to export all the coordinates to another program, so I saved ...
1
vote
2answers
66 views

Calculate distance between two points with QGIS 2.14.0

I don’t use QGIS that much. I have two shapefiles with the following information: List A: ID 1, xA, yA, ID 2, …. List B: ID 1, xB, yB, ID 2, …. x/y = lat/lon I want to calculate the ...
0
votes
0answers
13 views

QGIS Atlas turning on/off raster layers

I'm attempting to create a series of maps in qgis atlas with the same coverage and background data but different raster outputs (flood mapping outputs for a range of scenarios). I've created a .shp ...
1
vote
0answers
41 views

Corrupted Shapefiles when saving edits in QGIS

Has anyone experience regular corruption of Shapefiles when saving edits in QGIS? Since testing the new LTR, we have had regular occurrences of the Shapefile being corrupted, and "_packed" SHP and ...
0
votes
0answers
14 views

Install unstable Qgis-master alongside release version [duplicate]

Good day I have the release version of Qgis (2.16) installed into Mint and it can be updated just with apt install qgis whenever a notification comes out that a new version is released. I want to ...
0
votes
2answers
49 views

Is it possible to import a Shapefile from Manifold into QGIS with the same projection?

is it possible to import a shapefiles from manifold to Qgis with the same projection?
2
votes
1answer
67 views

how to join a road network into as few lines as possible?

I am processing a polyline file that contains multiple lines representing city roads. I would like to join the lines together into as few lines as possible. I've tried using the 'join multiple lines' ...
3
votes
1answer
46 views

Why do I get “Data source is invalid” error when calling method?

QGIS 2.14 on Windows 7. I'm trying to call a method in a python script from the QGIS python console. I've put the directory in which the scripts resides in the PYTHONPATH in both the windows system ...
2
votes
2answers
21 views

Correct syntax for loading virtualxl spatialite table?

I believe I have successfully loaded a virtual Excel table into a spatialite database using the SQL below - typed into the qspatialite plugin for QGIS. create VIRTUAL TABLE MyVirtualTable1 USING ...
0
votes
1answer
23 views

Direct access to DGPS data in QGIS?

I'm heading out to the Arctic Circle (Spitsbergen) I have a Sokkia DGPS and Magnet on a tablet device (connects to the DGPS and logs the data), they connect via blue tooth etc. Can I bring the data ...
2
votes
1answer
43 views

Why is the legend symbol alignment in Print Composer worse than in the main window layer list?

I created a point layer where point-symbols' size depends on a column of the attribute table. When they appear in Layers Panel, symbols look like this (every circle's centroid has the same "X-value" ...
0
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0answers
28 views

Join attributes by location - QGIS

I am trying to perform an attributes join by location between a shapefile (with points) and a second shapefile (with polygons). The points are hydrometric gauges, whereas the polygons are catchments. ...
2
votes
1answer
28 views

Why does my reprojected globe visualisation not draw?

I have followed all of the instructions in QGIS Map Design, Graser and Peterson, Locate Press 2016, and cannot get the visual of the reprojected shapefiles clipped to Rome coordinates to draw as in ...
1
vote
1answer
27 views

QGIS: SAGA-GIS module “Add raster value to point” Error: unknown option 'INTERPOL'

I encountered an error while using the "Add raster value to point" SAGA-GIS module in QGIS (2.16) to retrieve altitude values from a raster DEM previously interpolated from TIN points (as vector ...
2
votes
0answers
37 views

QGIS GRASS: Error when converting vector to raster

I am trying to convert a vectorial layer (a grid of regular points with values, representing probabilities, associated to each point). I tried to use QGIS, but I got this error: ERROR 1: Attempt to ...
0
votes
0answers
33 views

Amending existing plugins to match Qgis 2.16+ fTools removal

Part-time development started about a year ago to create an add-on for Qgis. Many of this plugins capabilities are written with fTools commands. I am wondering if there is a recommended document to ...
0
votes
1answer
25 views

Furthest point from polygon/point

I want to calculate distance between smaller dots (they represent towns, villages etc.) and these larger red dots (capital cities of admin. region). My goal is to show wich location is the furthest ...
4
votes
0answers
51 views

How to show labels exactly around a circle in QGIS?

I found an interesting way of proportional symbol mapping and labeling, I think this was made by Adobe Illustrator but I couldn't find out if it can be done in QGIS. What I am interested in the most ...
1
vote
2answers
51 views

Can't normalize LiDAR point cloud with lasheight and -replace z (LAStools)

When I try to use lasheight with -replace z to normalize the point cloud, the height of points are changed (destroyed heights; see pictures below). Without using -replace z everything is ok, but the ...
3
votes
1answer
63 views

Why are QGIS field calculator statements (both IF and CASE) giving strange results?

Using the field calculator, I'm trying to update an attribute only if it equals to zero: CASE WHEN "Z" = 0 THEN "Z" = rand(1,100) END This let the 0 values as they are and updates all others to "...
3
votes
1answer
44 views

What's the best way to handle a 'Site Datum' in QGIS?

So I have a client with a site datum, which is to say they have an arbitrary coordinate reference system with coordinates between -1000 and 1000 in X and Y. I have a list of ~20 coordinates that maps ...
0
votes
2answers
29 views

How to filter features based on scale?

Shape file has visibility attribute. This attribute is generated by algorithm and there is a manual override. In QGIS, is there a way to apply global (per project) or local (per layer) filtering to ...
3
votes
1answer
26 views

MultiPointZ wkt geom “multiple part to single parts” is losing Z coordinate

I have a "MultiPointZ" unique wkt geom feature constituted of several hundreds of points (X,Y,Z) in a shapefile. To split all these points each in a single feature, I used the "Vector > Geometry ...
1
vote
1answer
88 views

Is QGIS multi-threaded?

Is QGIS (2.16) multi-threaded? I do not see multiple processes on the console while running it on Ubuntu. It only uses one CPU. Is there anything to do to enable it?
2
votes
1answer
58 views

Clipping of a Raster changes Range of Cell Values

I'm facing a strange problem. I created a mosaic of two landsat scenes which contains values from ~ -5 to ~11 (Biomass estimation). As my study area is much smaller then the mosaiced Landsat8 scenes, ...
-2
votes
1answer
26 views

How to highlight feature from attributr table from the selected features?

We have option in Arcgis to highlight select/ unselect highlight feature from selected feature from attribute table. IS there a way to do this in QGIS ??
0
votes
0answers
24 views

Is it possible to create a standalone dbf table with pyqgis

I have written plugin that grabs tabular data via soap requests. As of now the results are written to a csv file. I would rather the results go into a dbf to retain numeric values for a variety of ...
0
votes
1answer
16 views

Cannot load postgis query as layer in QGIS using create table command

I've a multilinestring object and a points object , where the points are located on the line. The user can set a start and end point on the line and my goal is to return a subset of the points that ...
3
votes
1answer
62 views
+100

Qgis globe plugin (2.16) missing on Ubuntu 14.04

I just upgraded from Qgis 2.14 to 2.16 and I can't get the Globe plugin to work. Apparently, under Ubuntu it is necessary to install it separately. But in the Ubuntugis repository, only version 2.14 ...
1
vote
0answers
13 views

Setting color from color value in attribute table in QGIS? [duplicate]

I have a shapefile with colors (hex code) in the attribute table for each polygon. How can I set color of each polygon according to the color value in the attribute table?
1
vote
2answers
32 views

Setting up rulebased labelling programmatically in QGIS?

In my plugin I do some labelling a vector layer with QgsPalLayerSettings. This works fine for me with QgsMapRenderer::setLabelingEngine. But now I also want to implement the rulebased labelling. In ...
0
votes
0answers
33 views

Select all lines between two points

I need some ideas to solve the problem selecting all "lines" between two "points" using SQL Server. I have tables: Lines (line_id, geom) and Point (point_id, geom) I want to select all Lines between ...
4
votes
0answers
71 views
+50

Problem executing vectorgrid (from processing) in a standalone script using QGIS 2.8.6

I have the following piece of code which I execute within QGIS 2.8.6 import processing import ogr restrLayer = QgsVectorLayer("/home/usr/Desktop/trial/EligibleAreas_polygons_filtered.shp", "...
1
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0answers
28 views

How to use Hub distance in a processing model?

I am trying to make line layer (hub distance layer ) between two point layer in QGIS 2.16. It works fine when I make layers step by step but, I want to make MODEL in processing modeler and ...
1
vote
1answer
35 views

How to select all tags in “Export OpenStreetMap topology to SpatiaLite”?

When selecting fields to convert is there a way to select all within QGIS? I'm currently alternating space bar and a down arrow and this does not seem to be the most efficient method.
0
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0answers
21 views

When doing intersect columns are doubled in QGIS?

I am using QGIS version 2.14.1 (Essen). I am the spatial quieries (intersect function). When I do this, I save the new shapefile but it seems that in the new shapefile, the columns have been ...
1
vote
0answers
17 views

Is there a setting in QGIS that can stop auto-docking of dragged windows?

I apologize if this seems like a trivial question, but here goes: Often I find myself dragging windows to get them out of the way of the map, and QGIS decides to dock them in very inconvenient ways. ...
1
vote
0answers
47 views

How to convert building outlines to Polygons?

I have line vector layer which contains contours of buildings in the form of separate segments. I want to convert lines to polygons (QGiS 2.17) but it doesn't work. I'm trying to solve this problem ...