Dones – BD ORTHO® Historical 1950 51 – Alsace

The BD ORTHO® Historical IGN product is a collection of digital mosaics of ancient panchromatic orthophotographs (grey levels) rectified in the projection adapted to the covered territory. Details of the vintages (from 1950 to 1951) are included in the associated resources.BD ORTHO® 历史IGN产品是一套由历史全色正射影像（灰度级）构成的数字镶嵌图集合，所有影像均经过针对覆盖区域适配的投影校正。其影像采集年份（1950年至1951年）的详细信息已收录于关联资源中。