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

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1answer
8 views

Loading REST Service in QGIS?

How do I load this REST service in QGIS? https://tpwd.texas.gov/arcgis/rest/services/GIS/Ecosys1/MapServer The ArcGIS REST API Connector returns the error: [Errno 1] _ssl.c:504: error:14090086:SSL ...
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5 views

Missing qgis icon resources for symbology dialog

I'm trying to call QgsRendererV2PropertiesDialog from a standalone Qgis python script. It mostly works, except there's some "unknown error" messages related to SVG files when I trigger the dialog: ...
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13 views

Add attribute value from a Point layer to a Line layer in QGIS

I have extracted nodes from a line shapefile. On these nodes, I have extracted altitude values from a raster DEM using SAGA 'Add raster value to point'. I want now to make the inverse of the first ...
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22 views

Dasymetric mapping in QGIS?

I have the following shape layers: Rivers.shp NaturalArea.shp CountyBoundary.shp And I have a Census table showing the population count within the county. Now obviously nobody lives in a river or ...
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0answers
31 views

Why does QGIS 2.16 have longer load times than 2.8, especially working with tables?

I was previously running an LTR version of QGIS (2.8.9 I think). I installed 2.16 and found that opening tables takes a very long time. Deleting columns in tables now takes hours as opposed to seconds....
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1answer
18 views

qgis2web Plugin Broken?

After the qgis2web plugin was upgraded last week the popup window shows all fields in the attribute table when you click on a feature regardless of which ones were selected in the dropdowns when ...
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0answers
29 views

Shortest path between some points in QGIS

I'm using QGIS software to calculate shortest distance between 750 points (rental stations of the bike sharing of London) on OpenStreetMap. The lines should follow the streets of the map downstairs. ...
2
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0answers
32 views

Determining the first and last point that a polygon intersects

I have this... And I want to join those attributes to the polygon automatically: Because I'll have to replicate this on tones of those polygons. If this works I would like to know if it still ...
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0answers
12 views

Troubleshoot with “Split selected features with selected line from another layer”

I am trying to use the "Split selected features with selected line from another layer" tool from the plugin Digitizing Tools in QGIS. Sometimes, this tool works with my shapefiles but sometimes it ...
0
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1answer
20 views

Rendering polygons with Qgis2threejs?

I have a polygon shapefile cotegorised according to a specific field. I want to present that 3D with the help of Qgis2three.js (sth like that). I have installed the plugin and have chosen the polygon ...
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0answers
4 views

Creating a COM object from QgsMapCanvas

I want to embed a QgsMapCanvas object to a Windows Form. I did some digging but couldn't find much about if anyone has done it before. Is this theoratically possible and/or practical?
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16 views

QGIS Legend in print composer is corrupted

The legend in the print composer seems to be corrupted. It only shows a few items and when generated; stretches to a massive size and cannot be made smaller. This is a frustrating problem and I just ...
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0answers
20 views

How to add WMS Layer in custom projection to Qgis?

I published layer from ms-sql server on Geoserver. In sql table i have srid=60900. On Geoserver srs=60900. In Layers Previews layer looks nice. Now i tried show it in Qgis. I add projection and call ...
5
votes
1answer
53 views

Stop Qgis layer from refreshing every time I pan

I've got a layer in a QGIS project which source is a PostGIS view. It's a quite complex view and needs like 20 seconds to load (it makes several spatial analysis). My problem is that the QGIS project ...
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0answers
11 views

laszip batch process in qgis extension lastool

i am using qgis 2.16 in that lastool plugin contains laszip option. please tell how to run batch process in laszip. ill not able to add multiple files at a time in batch process.result came only for ...
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1answer
25 views

QGIS Topological editing error - the new polygon overwrite the existing one after saving layer edits

I'd like to digitalizing a map and when I draw a new polygon which overlaps an existing one, at first it merges the boundaries correctly, but after i'm saving the layer edits, the new boundaries ...
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23 views

QGIS “error: Grid file could not be opened” when filling sinks

When trying to run "Fill sinks" for SRTM30 data, there is a error and the log shows there was an "error:Grid file could not be opened". For the parameters: DEM: SRTM30 data; Sink route: [Not selected]...
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0answers
26 views

coordinate system are same unit also meters, but maps are not overlap [duplicate]

coordinate system are same unit also meters, but maps are not overlap WGS_1984_UTM_Zone_44N Projection: Transverse_Mercator False_Easting: 500000.000000 False_Northing: 0.000000 Central_Meridian: 81....
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29 views

QGIS get shape at position in shapefile

Im trying to develop an API to complement a geolocation app but I'm very new to GIS as a whole. I have a shapefile which subdivides Australian states into land zones (classifying them as Residential, ...
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0answers
19 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
11 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 ...
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0answers
47 views

How to remove the 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 ...
11
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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
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1answer
25 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 ...
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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
27 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 ...
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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. ...
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0answers
17 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 ...
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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 ...
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0answers
20 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
32 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
30 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
62 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 ...
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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 ...
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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 ...
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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
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2answers
46 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
66 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' ...
2
votes
1answer
41 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
20 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
41 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" ...
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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
24 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
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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
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0answers
28 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
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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
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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
36 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 ...