Abandoned Mines in New Jersey

The Geographic Information System (GIS) point layer, Abandoned Mines of New Jersey contains locations and attributes for abandoned mines. The shapefile has locations for nine types of abandoned mines which are Copper, Graphite, Iron, Lead, Mica, Manganese, Sulfide, Uranium and Zinc. There are 588 abandoned mine locations in the database and they are mapped at a scale of 1:24,000. This updated version of the data has undergone significant changes in two USGS quadrangles since the previous version of this data, dated July 29, 2005, was published. Previously, Bloomsbury, Blairstown, Easton, and High Bridge USGS quadrangles were updated. In this update, field work by geologists was conducted to improve the locational information of the mines in the Franklin and Riegelsville USGS quadrangles. Some of the mines in these quadrangles were located using the global positioning system (GPS). Certain mines in these quadrangles were mapped for the first time and appear in this data but not in the previous version of the data. Some known mine locations in the previous version of the data have been more accurately mapped and the points have been relocated.地理信息系统（Geographic Information System, GIS）点图层——新泽西州废弃矿井，收录了废弃矿井的点位坐标与属性信息。该数据集以形状文件（shapefile）格式存储，涵盖9类废弃矿井的点位，分别为铜、石墨、铁、铅、云母、锰、硫化物、铀及锌矿。数据库中共收录588处废弃矿点，制图比例尺为1:24000。自2005年7月29日发布首个版本以来，本次更新的数据在两幅美国地质调查局（United States Geological Survey, USGS）标准图幅内做出了重大修订。此前该数据集已对布卢姆斯伯里、布莱尔斯敦、伊斯顿及海布里奇的USGS图幅完成更新。本次更新中，地质人员通过野外作业优化了富兰克林与里格斯维尔USGS图幅内矿井的点位信息。部分图幅内的矿井通过全球定位系统（Global Positioning System, GPS）完成点位测定。部分矿井为本次更新中新绘制的点位，仅收录于本版数据，未出现在旧版数据中。旧版数据中部分已知矿点的位置已得到精准修正，并完成了点位重定位。