qBRA

QBRA is a collection of QGIS tools for aviation procedures. This repository currently includes the QBRA ILS/LLZ plugin, which creates BRA (Basic Radio Aids) areas around a selected navaid using the same calculations as the original QGIS script.

QBRA ILS/LLZ plugin

Folder structure

The plugin lives in the qbra_ils_llz folder and follows the same structure as other QBRA/qpansopy plugins:

• qbra_ils_llz/qbra_plugin.py – main plugin entry class.
• qbra_ils_llz/modules/ils_llz_logic.py – all BRA geometry calculations (ported from the legacy script).
• qbra_ils_llz/dockwidgets/ils/ils_llz_dockwidget.py – controller for the dock panel.
• qbra_ils_llz/ui/ils/ils_llz_panel.ui – Qt Designer UI for the panel.
• qbra_ils_llz/icons/ils_llz.svg – plugin icon.
• qbra_ils_llz/metadata.txt – QGIS plugin metadata.

Installation in QGIS

1. Create a ZIP file that contains the qbra_ils_llz folder at the root (for example qbra_ils_llz.zip).
2. In QGIS, open Plugins → Manage and Install Plugins....
3. Choose Install from ZIP and select the ZIP you created.
4. Enable the QBRA ILS/LLZ plugin in the Plugins list.

Usage

1. Load your navaid point layer and routing/runway line layer into the QGIS project.
2. Make sure the navaid layer has the same attribute order as the original script (site elevation in field 4, runway identifier in field 5).
3. Select one navaid feature and one routing/runway feature.
4. Click the QBRA ILS/LLZ toolbar button or menu entry to open the dock panel.
5. Choose the navaid and routing layers in the panel (they default to the active layers), then press Calculate.
6. The plugin will create a new memory layer with the BRA polygons and add it to the project.

The calculations and resulting geometries are intended to match the original ILS_LLZ_single_frequency.py script.