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

BTA layer (reference year 2014) containing linear hydrographic elements for the entire territory of Navarre at 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）涵盖纳瓦拉全境1:5000比例尺的线状水文要素。BTA是为适配西班牙国家地理研究所（National Geographical Institute，缩写IGN）的国家制图基础底图（National Cartographic Base，缩写BCN）生产规范而开发的数据集。BTA为"统一地形基础底图（Harmonised Topographical Base）"的缩写，该数据模型由西班牙各自治区（CCAA）共同商定，并经高级地理委员会（Higher Geographical Council，缩写CSG）批准，其首个版本v1发布于2008年。