Information System Offshore Sands (In_Sand) — Sanbbia Picking Interventions

It refers to the polygon that represents the sand sampling area within the established subzone. To date, four sand removal operations have been carried out in offshore deposits, distributed as follows: three in the RER_C1 field in 2002, 2007 and 2016 and one in the RER_A0 field implemented in 2007.本数据集对应的多边形要素代表已划定次级分区内的采砂取样区域。截至目前，近海砂矿床已开展四次采砂作业，具体分布如下：2002年、2007年及2016年在RER_C1矿区实施三次作业，2007年在RER_A0矿区实施一次作业。