Utah PLSS Townships GCDB

PLSSTownship_GCDB is the first level of a hierarchical break down of the Public Land Survey System Rectangular surveys. This data is Version 2.3 2020 of the Utah GCDB. This data set represents the GIS Version of the Public Land Survey System. Updates are expected annually as horizontal control positions from published sources and global positioning system (GPS) observations are added. The primary source for the data is cadastral survey records housed by the BLM supplemented with local records and geographic control coordinates from states, counties as well as other federal agencies such as the USGS and USFS. This data was orginally published on 1/3/2017. Updated 12/15/2020 In the Public Land Survey System a Township refers to the largest unit of PLSS, that is normally six miles on a side.PLSSTownship_GCDB 是公共土地测量系统（Public Land Survey System, PLSS）矩形测量层级分解的第一级单元。本数据集为犹他州地理坐标数据库（Geographic Coordinate Database, GCDB）2020年发布的2.3版本，属于公共土地测量系统的地理信息系统（Geographic Information System, GIS）格式版本。由于将持续纳入公开来源的平面控制点位数据与全球定位系统（Global Positioning System, GPS）观测成果，该数据集预计每年都会进行更新。其核心数据来源为美国土地管理局（Bureau of Land Management, BLM）馆藏的地籍测量档案，并补充了各州、各县以及美国地质调查局（U.S. Geological Survey, USGS）、美国林务局（U.S. Forest Service, USFS）等其他联邦机构提供的地方档案与地理控制坐标。该数据集最初于2017年1月3日发布，并于2020年12月15日完成更新。在公共土地测量系统中，乡（Township）是PLSS的最大测量单元，其边长通常为6英里。