area representing the decline of the coastline in 2012

polygon-type layer materialising the zoning delimiting the coastline boundary in 2012 and the boundary of the layer “N_CONTOUR EAU_SURF_975” representing the vectorised contour of the archipelago. this layer is derived from the intersection of these two data. the limit of the coastline in 2012 is a linear type data, carried out by the BRGM as part of the VULIT study completed in 2016. this data set was produced by the SERAP UAT within the DTAM 975.本多边形图层用于表示2012年海岸线边界分区，以及代表群岛矢量化等高线的"N_CONTOUR EAU_SURF_975"图层的边界。 该图层由上述两类数据的空间交集运算生成。 2012年海岸线边界为线性类型数据，由法国地质与矿业研究局（BRGM）作为2016年完成的VULIT研究项目的一部分开展制作。 本数据集由DTAM 975框架下的SERAP UAT编制完成。