Drainage basin of the open sea coast of the Oriental Mariña, highlighted in green, on the Northeastern corner of Galicia, Spain. The basins of the rías of Foz and Ribadeo are on either side.
References:
National Topographic Map 1:25.000
Vectorial Base Map of the Xunta de Galicia
Cadastre

The map was created in Inkscap in SVG format. It is 20 by 20 cm at scale 1/100,000.
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Iago Casabiell González