Installation

Prerequisites

OMRAT requires:

• QGIS 3.30+ (qgisMinimumVersion=3.30 in metadata.txt). The plugin is Qt 6 compatible (supportsQt6=True).

• Python 3.9+ (bundled with QGIS).

• A handful of scientific Python packages listed in requirements.txt (NumPy, SciPy, Shapely, GeoPandas, Matplotlib, Pydantic, pyproj, Requests, Pandas). If you install OMRAT via the QGIS Plugin Manager the qpip plugin dependency installs these automatically — see below.

Optional:

• psycopg2 – for PostgreSQL/AIS database connectivity (only needed if you import traffic from a remote AIS database).

Installing the Plugin (recommended)

Via QGIS Plugin Manager

This is the normal install path. QGIS handles both the plugin and its Python-package dependencies.

1. Open QGIS.

2. Plugins -> Manage and Install Plugins….

3. Search for “OMRAT” or “Maritime Risk” and click Install Plugin.

When OMRAT installs, QGIS sees plugin_dependencies=qpip in metadata.txt and offers to install qpip (the QGIS Python Package Installer, https://github.com/opengisch/qpip) if it isn’t already present. Accept the prompt.

qpip then reads OMRAT’s requirements.txt and installs any missing Python packages into the QGIS Python environment automatically. On first run you may see a short progress dialog while pip fetches the packages.

Enable OMRAT in the plugin manager (the checkbox) and you’ll see the OMRAT icon appear in the QGIS toolbar.

Note

If qpip’s first-run install is blocked by a corporate firewall or proxy, you can install the dependencies manually – see Manual dependency install (fallback).

From Source (developers)

1. Clone the repository:

   git clone https://github.com/axelande/OMRAT.git
   

2. Copy or symlink the OMRAT folder into your QGIS plugin directory:

   • Linux: ~/.local/share/QGIS/QGIS3/profiles/default/python/plugins/

   • Windows: %APPDATA%\\QGIS\\QGIS3\\profiles\\default\\python\\plugins\\

   • macOS: ~/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/

3. Restart QGIS and enable the plugin from the Plugin Manager. qpip will still be offered on first launch and handle the dependency install as described above.

4. For running the test suite outside QGIS, see Manual dependency install (fallback) – the dev-only packages (pytest, pytest-cov, pytest-qgis) are in requirements.txt but are not needed to run the plugin itself.

Manual dependency install (fallback)

Only needed if qpip isn’t available or is blocked (e.g. offline install, restrictive network).

On Windows with OSGeo4W:

C:\\OSGeo4W\\bin\\python3.exe -m pip install -r requirements.txt

On Linux/macOS with the system QGIS Python:

python3 -m pip install --user -r requirements.txt

You can also install just the runtime packages (skip the pytest* entries) if you don’t plan to run the test suite.

Verifying the Installation

After installation, you should see the OMRAT icon in the QGIS toolbar. Click it to open the plugin dock widget. The widget should display tabs for: Route, Traffic, Depths, Objects, Distributions, Results, and Drift Analysis.

If the plugin fails to load:

• Check Plugins -> Installed for a red error badge on OMRAT; hover it to see the import error.

• The most common cause is a missing Python dependency that qpip did not install. Try the Manual dependency install (fallback) fallback.

• QGIS message log (View -> Panels -> Log Messages Panel) has an OMRAT tab with plugin-side errors.