Cartography BTA 1:5,000 (reference year 2014). Hydrography enclosure

BTA layer (reference year 2014) containing surface hydrographic elements for the entire territory of Navarre on a 1:5,000 scale. The BTA is an adaptation to the production of the National Cartographic Base (BCN) of the National Geographical Institute (IGN). BTA is the acronym for “Harmonised Topographical Base”. It is a data model agreed by the Autonomous Communities (CCAA) and approved by the Higher Geographical Council (CSG) of which there is a version v1 dated 2008.