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.BTA图层（基准年为2014年），包含纳瓦拉全境1:5000比例尺的地表水文要素。BTA是适配国家地理研究所（National Geographical Institute，IGN）国家制图基准（National Cartographic Base，BCN）生产体系的数据集模型。BTA为‘统一地形基准（Harmonised Topographical Base）’的首字母缩写，该数据模型由西班牙自治区（CCAA）商定，并经高级地理委员会（CSG）批准，其2008年发布的v1版本现已推出。