Where were the Roman provinces of Narbonensis, Aquitania, Lugdunensis, and Belgica located?

Under the administrative reforms of the emperor Augustus, the Roman territory of Gaul was divided into four provinces. Their approximate locations were as follows:

• Narbonensis: Located in southeastern France, this province stretched between the Alps, the Mediterranean Sea, and the Cévennes Mountains.1
• Aquitania: Situated in southwestern Gaul, this region originally spanned the area between the Pyrenees and the Garonne River, later expanding under Augustus to reach the Loire and Allier rivers.23
• Lugdunensis: Centered on the capital of Lugdunum (modern Lyon), this province extended northwest across the land between the Seine and Loire rivers, reaching toward Brittany and the Atlantic Ocean.2
• Belgica: This province stretched from the Seine River eastward to the Rhine River, encompassing parts of the Low Countries in the north and extending into western Switzerland in the south.4