Mapping BTA 1:5,000 (reference year 2020). Hydrography line

BTA layer (reference year 2020) 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（统一地形基准，Harmonised Topographical Base）图层（参考年份为2020年）涵盖纳瓦拉全境1:5000比例尺的线性水文要素。BTA是适配西班牙国家地理研究所（National Geographical Institute，缩写IGN）国家制图基准（National Cartographic Base，缩写BCN）生产工作的数据集。该数据模型由西班牙自治区（Autonomous Communities，缩写CCAA）共同商定，并经西班牙高级地理委员会（Higher Geographical Council，缩写CSG）批准，其v1版本发布于2008年。