Layer Creation Denied Qgis

here in this map when a user clicks on a state we would want it to popup the information about it. 5) to replace v2. We use cookies for various purposes including analytics. Metadata in QGIS An Overview. Add your data to qgis. How to do it We will load the shapefile as a vector layer, validate it, define the feature ID we want to change, create the new geometry, and change the feature in the layer. Set the Output shapefile by pressing Browse button. QGIS - MMQGIS - Create Grid Layer. runalg("gdalogr:cliprasterbymasklayer", raster_output, polygon_file, -1, False, False, False, 6, 0, 75, 1, 1, False, 0, False, "", 'E:/output_crop. Binary packages (installers) are available from this page. In this recipe, we will load the line layer from the shapefile, build a list of points, create a new geometry object, and add the points as a line. shp and then open it in QGIS the layer will automatically get the style I created. Comparing to ArcGIS, QGIS can be installed on various operating systems, such as Windows, Mac OS X, Linux (Ubuntu), and Unix, while ArcGIS only has Windows version. Go to the Tile Caching tab, and uncheck Create a cached layer for this layer group. core import QgsVectorLayer, QgsField, QgsMapLayerRegistry from PyQt4. But the map window remains empty. Open the Attribute table and start editing. GeoPackage is an OGC standard data package that can store different kinds of spatial data types such as points, polyline, and polygon. The screencast here shows fetching and rendering a WMTS layer in QGIS 2. On the fly. I'm curious of the extent polygon is going to retain the 30km distance though. This is a group of videos called "Working with Sentinel 2 Imagery on QGIS" that shows the complete procedure to download, represent and process Sentinel 2 images in QGIS. Lastly, we will define layers that can be used in QGIS, customized according to our needs. Go to Processing | Toolbox. The steps outlined in this GIS video tutorial are: First, choose how you want to select features from your dataset from the menu:. A plugin called Profile from Line appears to do this. 20 any new fields I create and any associated data are not saved. QtCore import QVariant 'create Layer' self. initQgis(). When you have made all your settings, hit OK and wait for the export to process the GeoTIFF. Python is the scripting language for QGIS. Lesson: Creating a New Vector Dataset¶. GeoPackage is a special data package that you can use in QGIS. This tutorial aims to help GIS users to get started with Python programming for QGIS 3. Files are available under licenses specified on their description page. Choose Project ‣ Open… from the menu bar. QtCore import QVariant 'create Layer' self. )" boundary file attached I have re-installed QGIS 1. net Error: the following layers were not correctly generated General Question I'm trying to use v. You will need to open the Toolbox first. So, mostly my tutorial beginner friendly. A specified expression (or field name) is used to create categories for the renderer, with QGIS creating a category for each unique value within the layer. In QGIS it is quite simple. I have a problem with creating a new polyline shapefile on Arccatalog. If you still using older version, you can freely upgrade your QGIS installation to version 3. QGis will now want to know some basic information about the layer: For a map that’s usable in Highmaps later on, we will want to draw polygons. Pyramid Layers for QGIS and ArcGIS. I want to use memory layers for intermediate calculation results since I am only interested in the end result. Just create a new layerobject like this: from qgis. New fresh QGIS feature! So fresh in fact you can still smell the wet paint :) QGIS (development build) can now display map tips using HTML (a subset anyway). When a user clicks on a airport marker, we want an info-window to disply useful information about the airport. More information. That means that if you change the directory of a Shapefile or the schema name of your PostGIS layer, AutoFields won’t be able to find their associated layer and will be disabled. The steps outlined in this GIS video tutorial are: First, choose how you want to select features from your dataset from the menu:. -Go to menu Layer > Create Layer > New Geopackage Layer, in the dialog box you configure the location and name of the database, the properties of the first layer it will contain. These plugins can also be installed directly from the QGIS Plugin Manager within the QGIS application. Changelog for QGIS 2. Windows) or going to “Layer” on the toolbar at the top and finding it. isValid() always returns False (or "Layer is not valid!" in this case). Double click ne_10m_rivers_lake_centerlines in the. In QGIS, the Random points in layer bounds tool creates a specified number of random point features. Apr 26, 2016 · I have an interesting problem in QGIS, I have a vector layer of points (shown in purple) and a layer of polygons (green) with a number of metadata attributes attached (i. Follow Along: The Layer Creation Dialog¶ Before you can add new vector data, you need a vector dataset to add it to. Explain how to determine if you should install the 32-bit or 64-bit version of QGIS on a Windows 10 machine. Press the Create Layer from Selected to add the selection to the map as a new layer:- Combined Spatial and Attribute Query Quite often GIS is used to select features that contain a certain attribute within a certain area (e. To create points from a table in QGIS, I am going to use the Vector Creation in QGIS Toolbox. Select the ne_10m_airports. In this example streets is selected so streets selected is added. Although many are already in QGIS 3, but unfortunately not all of them, including OpenLayers. In QGIS, go to Layers ‣ Add Vector Layer. In the next figure you can see a basic map, with three layers (roads in red, towns in green and rivers in blue) which I want to add to the basemaps in the GPS device which lately I would like to use to navigate in a remote area. brightness, blending mode and transparency can be adjusted. Today, we are going to show you how to clip a vector layer using polygon on QGIS. shp" in QGIS. To add the layer, click "Layer > Add Layer > Add Vector Layer. This repository contains a short tutorial for creating a species distribution model using QGIS, R, and MaxEnt. You go to Layer > Create new Layer > Temporary Scratch Layer. • The Symmetrical Difference tool isused to perform overlay analysis onfeature classes. On this tutorial, we are going to learn how to create a new shapefile layer on QGIS. When you create a new shapefile, you must define the types of features it will contain, whether those features will represent routes (m-values), and whether those features will be three-dimensional (z-values). Today, I am going to show you how to export layer to Shapefile on QGIS. The new cameras4 layer will appear in the QGIS Layers window. Strengths / weaknesses: QGIS is simple, free, open-source software; Open the georeferenced image (Layer > Add Raster Layer) or WMS layer (Layer > Add WMS Layer) in QGIS. Did you just download a KML from the Spotzi Datashop and do you use QGIS? Read how to import KMLs into Mapinfo software and visit our Help Center. 5 of QGIS User Guide. 50 MB total, max 10 concurrent database connections). In this tutorial, we will work through the steps to generate various products from elevation data such as contours, hillshade etc. QGIS is a free, open source professional GIS software available for Windows, macOS and Linux used to create and edit geospatial information. Shapefile layer cannot be generated - blank warning [closed] That's it. There are also buttons to create a new ESRI Shapefile layer, remove a layer, and for GPS tools. Then create an extent polygon from that output buffer using Vector > Research Tools > Polygon from layer extent. We can import other file formats to QGIS but also we can create spatial files directly on QGIS. If you are aiming for a different style, give hexagonal grids a try. monde-geospatial. Creation of a new GRASS layer is supported within the GRASS plugin. For CREATE OPTIONS set to No Compression. To hell with doing that by hand! Remember the contour tool in QGIS told us the exact command line args to use, so creating a shell script for automating the process is pretty easy. They allow you to define a layer as the result of an SQL query involving any number of other vector layers that QGIS is able to open. I have a problem with creating a new polyline shapefile on Arccatalog. Edit QGIS project¶ Click Geospatial ‣ Desktop GIS ‣ QGIS. qlr) similar to ArcGIS Layer File (. We will also create a new feature, set the geometry, and add it to the layer's data provider. Save the new layer to an appropriate location. In the New Vector Layer dialogue shown below, select the Specify CRS button. Did you know you can create 3D map in QGIS and view it in a browser? Creating 3D map in QGIS. Creating Maps in QGIS: A Quick Guide Overview Quantum GIS, which is often called QGIS, is an open source GIS desktop application. Over 140 recipes to help you turn QGIS from a desktop GIS tool into a powerful automated geospatial framework QGIS Python Programming will teach you how to write Python code that works with spatial data to automate geoprocessing tasks in QGIS. Most raster data providers may keep metadata in the filename itself, like path, row and a timestamp. QGIS – Create layer from text file Step 3 – Joining the data Joining the polygons in westminster_const_region. When you select the "layer stack" tool a separate small window will open. There are a couple of python plugins allowing users to add XYZ tiles (e. Closed qgib layer name for GPX driver (github fixes qgis#29819). &Coordinate Capture Click to select the CRS to use for coordinate display Coordinate in your selected CRS Coordinate in map canvas coordinate reference system Copy to clipboard Click to enable mouse tracking. QGIS - Create layer from text file Step 3 - Joining the data Joining the polygons in westminster_const_region. 16) * \param layerName layer name. On the fly. OpenStreetMap without problems. It simply saves the currently visible map. These types of edits can easily be done within a desktop GIS such as QGIS. For this tutorial I used two data, road network and building with the rule must not overlap with. 2 we show those units directly within the dialog. monde-geospatial. Today I thought I should write tutorial on adding X and Y coordinates from the excel file. QGIS Biological Records tool:. Creation of a new GRASS layer is supported within the GRASS plugin. To add the layer, click "Layer > Add Layer > Add Vector Layer. You can do selection by two ways. It is not limited to WMS: any request that should be proxyed (eg going to QGIS web page) does not work. Creating a TIN. Adding layers in QGIS is a piece of cake. The added layer streets selected is temporary so user have to save it for permanency by right clicking and then go to save as. Choose select features and select the required layer from multiple layer. Check out this text for short introduction to DEM visualisation and 3D building rendering in QGIS. Lab 3: Digitizing in QGIS What You'll Learn: In this Lab you'll be introduced to basic digitizing techniques using QGIS. Landsat data download and Layer Stacking in QGIS. I am using QGIS version 3. QGIS is free and open source software for creating, editing, visualising, analysing and publishing geospatial information. Welcome to QGIS Tutorial for Beginners. In this tutorial I will cover how to create an open action and a python action. On the fly. Any idea how I can make QGIS operate from GUI (unity) with root privileges without having to open it via terminal and adding the sudo prefix?. Need Data for study then Download Shapefile of Australia and United States Shapefile. Add the layer. Today, I am going to start with a simple QGIS Tutorial to create new shapefile layer on QGIS. If you still using older version, you can freely upgrade your QGIS installation to version 3. Basic rules for writing Python scripts for Processing Toolbox in QGIS Posted on April 12, 2017 November 8, 2017 by howtoinqgis One of the most powerful QGIS tools is the possibility to create custom Python codes and then adding them to the Processing Toolbox. The menu bar provides access to various QGIS features using a standard hierarchical menu. Are you newbie QGIS 3. Installed QGIS 3. shp to the data imported from the Results_Cleansed spreadsheet will allow the data to be presented in a spatial and visual format which will be much easier to interpret, allow for spatial analysis and also give the viewer an idea of. You may have to click it several times to dismiss the box. We will load the vector layer from the shapefile, create a new geometry object as a point, create a new feature, set the geometry, and add it to the layer's data provider. The raster layers correspond to a digital elevation model and an orthophoto. QGIS library functions and MMQGIS tools can also be used in stand-alone Python scripts that you can run without having to start QGIS. Problem: CLick "Create New Shapefile Layer" and I get the pulldown menu (file name, geomeotry type, etc. Heat map plug-in in QGIS is used for creating heat map (density map) which is using a kernel density estimating algorithm. The plugins only allow certain web services and it is often tricky for supporting the private ones. QGIS - Creating Map. We also see links to other other layers. Problem: Click "Create New Shapefile Layer" and I get the pulldown menu (file name, geomeotry type, etc. Sep 1, 2019- QGIS Tutorial How to Create Contour. Add attribute table with Add new legend, chose the appropriate layer. Various vector layers and tables (OGR, SpatiaLite, PostGIS, MSSQL Spatial or Oracle Spatial) can be edited in QGIS. To do this, make sure the Digitizing toolbar is visible (it should be by default). Cannot create layer because "unable to open database file" in QGIS 3. Go to Processing | Toolbox. ArcGIS has several defaults set. A window will then prompt you to pick the format of the file being saved, choose 'ESRI Shapefile'. QGIS Cloud gives you a full-featured PostgreSQL 9 databases, extended with PostGIS 2. Last year we described a command line method that adds ESRI REST layers in QGIS. The unique index on column '%1' is unsuitable because Quantum GIS does not currently support non-int4 type columns as a key into the table. This is a part of our QGIS Tutorial for Beginner series. Saving a selection as a new file is a fairly straighforward process. When you create a new shapefile, you must define the types of features it will contain, whether those features will represent routes (m-values), and whether those features will be three-dimensional (z-values). Save your project to your \webapp\preprod\maprep folder. Create a new QGIS project - add your data layers, style and symbolize them. layer_defn = layer. So I came across this nice little project which focussed on trip planning and route over large distances… And there was this nice little post from Nathan Yau at flowingdata. Select the Identify tool and click on any of the points to examine the available attributes. I would like to show a raster layer and beyond it another layer which contain lines (polylines) which is boundary of cells in other raster layer I think about split each cell into new raster file. QGIS (previously also known as Quantum GIS) is a free (GNU GPL v2) and open source GIS application enabling the user to visualize, manage, edit, analyse data, and compose printable maps. Hello everyone, welcome to my QGIS Tutorial. If you are using ANY OTHER encoding, create TWO tables: one for the LAT LONG import, and one to join the other character set attributes to the resulting points layer (see JOINS for details on how to accomplish the second JOIN process). The latest Tweets from QGIS (@qgis). Go to Vector -> OpenStreetMap -> Export Topology to SpatiaLite… In the first field, select the database you created in the previous step. Harvard CGA QGIS 2. csv file added as delimited text layer. How to add a new FC to an existing FGDB, using QGIS: a) create and edit a new scratch layer, as in 2 a-b above. A specified expression (or field name) is used to create categories for the renderer, with QGIS creating a category for each unique value within the layer. Installed QGIS 3. Raster Extent Modification Using QGIS UPDATE : you can download script for Processing module to perform this task from here. The second option is useful if one of the maps was a list of latitude and longitude locations and you needed to find the total or average number of dots in a given polygon or town shape. Explore basic functions of QGIS. I'm not sure what I am doing wrong here, or if I have instantiated the QgsVectorLayer variable incorrectly. Add the layer topp:states (if you used this layer) and choose the style just created (in our case topp_state_subregion). V Layers Word Wrap. Using QGIS to create a custom map June 14, 2015 11 minutes read | 2311 words. The screencast here shows fetching and rendering a WMTS layer in QGIS 2. all polygons or all points) and in one folder with no other data. I want to use memory layers for intermediate calculation results since I am only interested in the end result. A virtual layer is contained within the QGIS project file. This QGIS shows you how to do this with the Manage Layers toolbar. Set the Output shapefile by pressing Browse button. When a user clicks on a airport marker, we want an info-window to disply useful information about the airport. How to do it We will load the shapefile as a vector layer, validate it, define the feature ID we want to change, create the new geometry, and change the feature in the layer. In the New Vector Layer dialogue shown below, select the Specify CRS button. Cannot create layer because "unable to open database file" in QGIS 3. number of floors) for plots in an urban area using image maps. Warning is blank. Create Tableau polygons from shapefiles using QGIS Before you follow the steps in this section, the coordinates in your shapefile should already be in the form of decimal latitude and longitude units, specifically using EPSG: 4326, WGS 84. Select the zipped shapefile. Today, I am going to start with a simple QGIS Tutorial to create new shapefile layer on QGIS. QGIS Basics #2: Create Polygon Layer and Add Polygons - Duration: 6:31. Choose select features and select the required layer from multiple layer. Although GeoServer allows you to create a tile cache for this layer, we will focus on creating caches in the next lesson using a program called TileMill that has superior drawing options. 1 user check QGIS 3. Today, we are going to show you how to clip a vector layer using polygon on QGIS. Lab 3: Digitizing in QGIS What You'll Learn: In this Lab you'll be introduced to basic digitizing techniques using QGIS. Virtual layers are a special kind of vector layer. Creating new vector layers ¶ QGIS allows you to create new Shapefile layers, new SpatiaLite layers, new GPX layers and new Temporary Scratch layers. The following steps outline the process to code the above process into a model and run it on the downloaded datasets. In QGIS it is quite simple. When a user clicks on a airport marker, we want an info-window to disply useful information about the airport. This is a very quick guide on adding web basemaps to QGIS 2. Most of the time this resolution will not be satisfactory. This QGIS shows you how to do this with the Manage Layers toolbar. Before you start a editing session in QGIS, make sure you set the right snapping options. You can also edit and create vector layers in Esri shapefile or SpatialLite format. QGIS is a Desktop based Geographic Information System (GIS) Application for creating maps, editing, viewing and analyzing Geospatial data. Add vector layer by choosing the icon. If you load in a database layer, and go to the layer properties in the table of contents, the database connection properties are clearly listed. Create a new QGIS project - add your data layers, style and symbolize them. Add the DEM layer using Add Layer button. Before adding the basemap, let's load two vector layers from workshop_data/part_one folder: continent. Today I thought I should write tutorial on adding X and Y coordinates from the excel file. How to make Spatial Database in Spatialite Format Using Quantum GIS. We can see that there is an Add Raster Layer menu here, but there's also a Add WMS/WMTS, that's Web Mapping Service or Web Mapping Tile Service. This winds up the major vector data types you can load in to QGIS. This tutorial will discuss how to create contour lines in QGIS. Quantum GIS is a cross-platform, free and open source application. After completion, ADD RASTER LAYER and add the new GeoTIFF to QGIS It should have the saved Style included in the Rendered Image. QtCore import QVariant 'create Layer' self. GetLayer() #get possible layers. You are not actually creating a new layer or doing anything to the actual DEM. shp file; QGIS knows to associate the other files with this to create the full layer. In the New Vector Layer dialogue shown below, select the Specify CRS button. As the previous versions of QGIS, the software is really intended to make more spatiall analysis and management with less effort, however this version has new tricks and a new order to locate tools. State which layer properties tab allows you to edit the line layers of a shapefile. This project has no wiki pages You must be a project member in order to add wiki pages. Loading Unsubscribe from Edu Video Zone? How to create a 3D Terrain with Google Maps and height maps in Photoshop. To create a virtual layer, open the virtual layer creation dialog by:. Mapping GPS points with QGIS and adding attribute data 2. Raster Extent Modification Using QGIS UPDATE : you can download script for Processing module to perform this task from here. So, we will create a new feature, add some attributes, and then add everything to the layer, as follows: Start QGIS. How to create a point vector layer from X, Y coordinates using ArcGIS In this short tutorial we will show you how to create a vector point layer using coordinates data, stored in an excel sheet. These layer types were added as a provider back in 2. This new method allows to create a rectangle by 3 points where the second length is the distance between the point and the point projected perpendicularly on the. If you do not have a good skill on QGIS tools, then please read my earlier tutorial on QGIS Basics. When you select the "layer stack" tool a separate small window will open. 1 Redmine category:vectors Hello I get the following message when I try to create a new ShapeFile Layer: 2018-11-26T22:54:43 SUCCESS Laye. 8 several times, but that didn't help. Edit QGIS project¶ Click Geospatial ‣ Desktop GIS ‣ QGIS. Explain how to determine if you should install the 32-bit or 64-bit version of QGIS on a Windows 10 machine. The screencast here shows fetching and rendering a WMTS layer in QGIS 2. A very common approach for mapping point density is to use heat maps. First you need to create you map view in QGIS, adding and personalizing your layers as desired. QGIS Creating Map Layouts Printing and Exporting. This process is described in section 4. Press the Create Layer from Selected to add the selection to the map as a new layer:- Combined Spatial and Attribute Query Quite often GIS is used to select features that contain a certain attribute within a certain area (e. Then, find Vector Creation. shp gescheitert: Failed to create file MyShapeFileLayer. We will load the vector layer from the shapefile, create a new geometry object as a point, create a new feature, set the geometry, and add it to the layer's data provider. Essentially the plugin allows you to turn a numerical attribute as a “height” for your data. Easily create point maps: convert shapefile points to polygons in just 3 steps The free QGIS software can be used to easily convert points in shapefile maps to polygons. Saving one is as simple as Right Click Layer -> Save As Layer Definition File. You may have to click it several times to dismiss the box. Add the DEM layer using Add Layer button. QGIS is a hugely feature-rich, incredible powerful piece of GIS software. Heat map plug-in in QGIS is used for creating heat map (density map) which is using a kernel density estimating algorithm. All method can be used in both QGIS2 as well as QGIS3. http://changelog. 18, however there still seems to be a lack of documentation on them. You have full access to all features of a PostgreSQL/PostGIS database. I have a polygon layer that I created. We will use Birdlife's data records to plot the location of the most recent sitings (1980 to 2005?) of the Philippine Eagle (Pithecophaga jefferyi). Nice! Now, your layer with regular spaced points should have an attribute with the direction data and one with the speed data. Creating a Basic Map: Adding vector layer. Write the command that will navigate you to the "Add WFS Layer from a Server" dialog window in QGIS. Virtual layers are a special kind of vector layer. I'm able to open and edit shape files I've imported from ArcGIS, but when I attempt to create a new layer I get the following warning (under OGR):. The type of layer will depend on the kind of data that you are using. ) Fill everything out and click "ok" I get this: Layer creation failed. New fresh QGIS feature! So fresh in fact you can still smell the wet paint :) QGIS (development build) can now display map tips using HTML (a subset anyway). Orange Box Ceo 8,827,277 views. Previously, we created layers by loaded existing datasets into our project. GEOPROCESSING IN QGIS. If the CRS is known, QGIS will re-project it if necessary. http://changelog. qgs and press Open. Select Layer > New > New Shapefile Layer to create the new empty layer for your vector feature. isValid() always returns False (or "Layer is not valid!" in this case). Create layer of selected feature press button and you will see one more layer name + selected. You work. Add your data to qgis. &Coordinate Capture Click to select the CRS to use for coordinate display Coordinate in your selected CRS Coordinate in map canvas coordinate reference system Copy to clipboard Click to enable mouse tracking. Problem: Click "Create New Shapefile Layer" and I get the pulldown menu (file name, geomeotry type, etc. With ArcGIS you have the possibility of creating a fishnet of rectangular cells and the output can be polyline or polygon features. Learn how to save a selection from a GIS dataset to a new GIS file using QGIS with this quick video tutorial. With QGIS 2. Edit QGIS project¶ Click Geospatial ‣ Desktop GIS ‣ QGIS. An Android version is expected shortly. Are there OpenStreetMap WMS servers? but also, is there any easy support for standard "google format" tile servers (like tile. I'm having problems creating new shapefiles - in QGIS 2. Basemaps are often presented through different webservices: TMS, WMS, WMTS, ESRI ArcGIS Services or simply as XYZ tiles. I'm able to open and edit shape files I've imported from ArcGIS, but when I attempt to create a new layer I get the following warning (under OGR):. On this tutorial, we are going to learn how to create a new shapefile layer on QGIS. shp and airports. Change log for the next release of QGIS 2. Select Layer > New > New Shapefile Layer to create the new empty layer for your vector feature. If you have suggestions for how to improve the wiki for this project, consider opening an issue in the issue tracker. 18 Las Palmas, a new feature has been introduced that natively allows to add tilemap layers. Using QGis to edit and create Esri ShapeFiles Downloading some shapefiles For this examples I’ll use some shapefiles of Romania, you can get them here. QGIS Atlas dynamically changes the view extent to each feature in the index layer. x choice from the QGIS folder in your Start menu. Welcome to QGIS Tutorial for Beginners. QtCore import QVariant 'create Layer' self. There is a collection of plugins ready to be used, available to download. Shapefile layer cannot be generated - blank warning [closed] That's it. This is a two-step process. A plugin called Profile from Line appears to do this. To do this in QGIS, right-click on the loaded point data layer and click the 'Save As' tab. Creating new vector layers ¶ QGIS allows you to create new Shapefile layers, new SpatiaLite layers, new GPX layers and new Temporary Scratch layers. Join Gordon Luckett for an in-depth discussion in this video, Exporting layers to shapefiles, part of Learning QGIS. When a user clicks on a airport marker, we want an info-window to disply useful information about the airport. 0? Hot Network Questions Is 2FA via mobile phone still a good idea when phones are the most exposed device?. QtGui import * import sys. GeoPackage is a special data package that you can use in QGIS. QGIS for Beginners - Create a New Shapefile Layer on QGIS. QGIS can re-project a layer using both on-the-fly re-projection for the current session; and by saving a copy of the layer with a new Co-ordinate Reference System (CRS) defined. Creating new vector layers ¶ QGIS allows you to create new Shapefile layers, new SpatiaLite layers, new GPX layers and new Temporary Scratch layers. In QGIS you can already do save selection as to save a layer from your selection, and now offers functionality that allows you to create a new file or memory layer from whatever is in your clipboard. Quantum GIS requires that the table either has a column of type int4 with a unique constraint on it (which includes the primary key), has a PostgreSQL oid column or has a ctid column with a 16bit block number. In this tutorial I will cover how to create an open action and a python action. QGIS is an open-access. Each category is individually matched to the symbols which exist within the specified QGIS XML style database. I'm creating lines by selecting two features from various layers. These types of edits can easily be done within a desktop GIS such as QGIS. All you need to do is select a map layer containing geometries as your index layer. Select QGIS-NaturalEarth-Example. QtCore import QVariant 'create Layer' self. Various vector layers and tables (OGR, SpatiaLite, PostGIS, MSSQL Spatial or Oracle Spatial) can be edited in QGIS. I've now got the same problem in QGIS 3.