Geological Structure Contours, 1:24,000 Scale

These data provide users with a basic geologic framework of mapped structure contours for the state of Kentucky. These data were created with funding from the National Cooperative Geologic Mapping Act's STATEMAP Program, administered by the U.S. Geological Survey. KGS utilized this program to convert existing 7.5-minute geologic quadrangle maps to digital format. The goal of the digital mapping program is to establish a mapping database that links the graphic data with their geologic components. The data are produced and distributed by the Kentucky Geological Survey. Stuctural contours of varying datum digitized from the 1:24,000 Geologic Map Series maps. Structural contours were constructed by geologic map authors when the original geologic maps were published during the Kentucky geologic mapping program (Kentucky Geological Survey - U.S. Geological Survey from 1960 to 1980). Contoured formations were determined by the quadrangle map author, so contour datum may vary across quadrangle boundaries. Therefore contours are not based on the most recent subsurface data and should only be used as a general guideline for the underlying geologic structure. Contours are in feet above sea level, and may vary in contour interval across quadrangle boundaries. Please note that some contours are projected above the land surface. Download File Geodatabase: https://ky.box.com/s/wng7lo6z4ko4zvfdfqvmg28ravwxi09p本数据集为用户提供肯塔基州已填绘构造等高线的基础地质格架。本数据由美国地质调查局（U.S. Geological Survey）管理的《国家合作地质填图法案》STATEMAP计划资助创建。肯塔基地质调查局（Kentucky Geological Survey，KGS）依托该计划将现存的7.5分钟地质图幅（7.5-minute geologic quadrangle）转换为数字格式。本次数字填图项目的目标是构建一套可将图形数据与其地质要素相关联的填图数据库。本数据由肯塔基地质调查局制作并发布。构造等高线源自1:24000比例的地质图系列（1:24,000 Geologic Map Series）地图，采用不同基准面数字化而成。在1960至1980年肯塔基地质填图项目期间（由肯塔基地质调查局与美国地质调查局联合开展），原始地质图出版时由地质图编制者绘制了构造等高线。受各图幅编制者的设定影响，不同图幅边界处的等高线基准面可能存在差异。因此，本套等高线未采用最新的地下数据，仅可作为下伏地质构造的通用参考依据。等高线单位为英尺海拔高度，且不同图幅间的等高距可能存在差异。请注意，部分等高线投影至地表以上。下载文件地理数据库（File Geodatabase）：https://ky.box.com/s/wng7lo6z4ko4zvfdfqvmg28ravwxi09p