QGIS Open Day – QHF March 2021

Join in on the QGIS INTEGRATED open day. Our amazing lineup of presenters will show you how QGIS can work in a network with other software and programs to create dynamic and sharable spatial data, maps, and systems.

If you would like to discuss topics on our QGISOpenDay, please add sections below for each discussion along with the proposed time and agenda.

Simply join the meeting on Jitsi and say hi! https://meet.jit.si/QGISOpenDay

To keep up to date with QGIS Open Day events, please join the Telegram channel

Programme overview:

Virtual events will be taking place online (see links below) and in the telegram chat room, and with many events also being live-streamed on YouTube. See the individual event descriptions below for an indication of where to join each event.

QGISOpenDay 26th March 2021

No Name Time Coordinator Language
1 Input and Mergin: collect data, sync, and collaborate with ease 08h00 UTC Saber Razmjooei English
2 Using QGIS, Input, Mergin, and Metabase to map the Waterberg 09h00 UTC Gavin Fleming English
3 Using QGIS and a laser cutter to make 3D contour models 10h30 UTC Raymond Nijssen English
4 Seamless fieldwork with QField & QFieldCloud 12h00 UTC Marco Bernasocchi English

QGIS Plugin – Multilayer Select #QGIS

Multilayer Select (QGIS plugin)

Add new selection tools that work across layers.

  • Select by Click
  • Select by Rectangle
  • Select by Polygon (and freehand while the mouse is pressed)
  • Select by Freehand
  • Select by Radius
  • Add/Remove to/from selection when pressing Shift/Ctrl
  • Select all features from all layers
  • Invert all features
  • Select by expression

One can also exclude some layers, that will not be used by the mutli selection tools

  • Selection color: effect icons, rubberband, and features
  • Set active..: If enabled and the active layer has no selected feature, change the active layer to the first layer with at least one selected feature
  • Replace default action: If True, replace the QGIS selection tool with the multilayer selection tools. Else, add the multilayer selection tools in their own toolbar
  • Display settings action on the toolbar
  • Included Layers: list the vector layers in the current project. Unchecked layers will be ignored by the multilayer selection tools (useful for ignoring a vector basemap for instance).
    • If Exclude hidden layers is checked (default), the selection tools will not select or deselect any feature belonging to hidden layers (unchecked in the QGIS layer tree view)
    • If Always include an active layer is checked (default), the active layer will not be ignored even if it is unchecked in the list.

Exclusion example

Exlusion Exmaple

Source: https://github.com/YoannQDQ/qgis-multilayer-select
Author: Yoann Quenach de Quivillic

Import maps of Azeroth from game “World of Warcraft” in QGIS

QGIS Plugin importing spatial data from World of Warcraft game to your computer!

The plugin can import both raster and vector data by running WFS and WMS requests to GeoServer. Currently, it’s fairly simple and can be considered as proof of concept, but in the future can be easily developed by adding more importable layers, like rivers, dungeon locations, mountain ranges, etc.

Author: Mateusz Ośko

http://plugins.qgis.org/plugins/wow_gis/
https://github.com/Mativane/wow_gis

Visualize nuclear energy in the world using the Nuclear Energy Plants Radiations plugin #QGIS

Nuclear Energy Plant Radiation Plugin

This project was developed on the course of the Geographic Information System (GIS) of the master’s degree program in data science at the University of Salerno. The goal of this project was develop a python plugin for the software Quantum GIS (QGIS) in order to visualize on the open street map all nuclear energy plant in the world. This plugin use the mqtt protocol for receive of radiation data from sensors in order to dinamically visualize it on the map. In order to clarify the visualization of the radiation data, a heat map was created and used. The plugin uses fake radiation, it simulates that the data comes from real sensors.

Authors

Project manager:

  • Domenico Marino  Energy_Plant Plugin  DomenicoM92
  • Ruggiero Mario  Energy_Plant Plugin  MarioR95

Source:
https://github.com/DomenicoM92/Nuclear-Energy-Plant-Radiations-

http://plugins.qgis.org/plugins/Nuclear-Energy-Plant-Radiations-/

Create a section profile of a DEM using the D.E.M. Slicer plugin #QGIS

D.E.M. Slicer

It is a simple cutting tool (in slices) of DEM data, to draw pretty postcards, for lovers of reliefs.

The principle is to build a series of altitude profiles (lines or polygons), to juxtapose them to give the illusion of a 3D view. Here, no calculation of the atmospheric refractive index, no consideration of the Earth’s curvature … just a little geometry, and the styles do the rest. The resulting layers are positioned where you want, the coordinate system used is that of the map (prefer 3857 rather than 4326 -in degrees-).

The offsets (varied according to the parameters chosen) in height of each cut simulate parallel or perspective views, a ‘radial’ vision attempts to get closer to the vision that an observer can have.

A ‘ridge line’ calculation enhances the reliefs.

Prerequisites

Author: Xavier Culos

More in english/french with examples: https://github.com/xcaeag/Dem-Slicer-Qgis-Plugin

http://plugins.qgis.org/plugins/dem_slicer/

Inkscape2Symbol #QGIS

Inkscape2Symbol is an experimental QGIS plugin.

Import SVG drawings created in Inkscape as symbols in QGIS.

QGIS 3.x plugin to easily convert Inkscape-generated SVG to QGIS-compatible symbol

Automating a simple yet tedious and crucial procedure to convert an SVG made in Inkscape into a format compatible with the QGIS symbol standard

Inkscape2Symbol plugin for QGIS allows you to set the default fill and outline colors. You can find it on the QGIS Python Plugin Repository (under the Experimental section)

Author: Hennie Kotze

Links:
https://github.com/javaftw/inkscape2symbol
http://plugins.qgis.org/plugins/inkscape2symbol-master/