LGRB-BW RAW: Excavation of raw materials shut down (points)

The presentation includes the decommissioned over-surface extraction points of the LGRB’s raw material extraction sites database. The collection points entered in the database have a unique name (operation ID), which consists of the TK25 sheet number and a serial number (archive number, Arnum for short). This means: (1) Arnums up to and including 99: Extraction sites that have been collected since the mid-1980s as part of the raw material protection concept. (2) Arnums from 100 to 299 inclusive: Extraction sites collected in the 1950s. (3) Arnums from 300: Extraction sites which had already been dismantled before the mid-1980s. The survey is carried out by the raw material geologists of Ref. 96 in the terrain (usually in connection with the processing of a KMR50) or by the collection of archival data. The coloring of the symbols is based on the raw material groups.本演示数据集涵盖LGRB原料开采点位数据库中已退役的地表开采点位。数据库中录入的采集点位拥有唯一名称（作业ID，operation ID），由TK25图幅编号与序列号组成，该序列号又称存档编号（简称Arnum）。具体规则如下：（1）Arnum数值≤99：自20世纪80年代中期起纳入原料保护理念范畴的已采集开采点位；（2）Arnum数值介于100至299之间（含两端）：20世纪50年代采集的开采点位；（3）Arnum数值≥300：已于20世纪80年代中期前完成拆除的开采点位。本次勘测由参考文献[96]所载的原料地质学家在野外开展（通常配合KMR50的相关数据处理工作），或通过收集存档资料完成。点位符号的配色方案以原料类别为依据。