Control Corner Shapefile

Approximate locations for most of the PLSS monuments in Eaton County, Michigan, USA. These locations are typically accurate within a meter +- of the true geodetic location of the monument. This dataset is a compilation of non-survey-grade points that were provided by remonumentation or captured by ECGIS geographers using a combination of GPS and GIS operations. Roughly 20% of existing Eaton County PLSS monuments are not yet included in this dataset. This dataset is a work in progress and should not be used to make decisions that require survey-grade precision.美国密歇根州伊顿县境内绝大多数公共土地测量系统（Public Land Survey System, PLSS）界标的近似坐标点位。这些点位的精度通常与界标真实大地测量位置的偏差在±1米范围内。本数据集为非测量级点位的整合集合，其来源包括界标重设项目提供的点位，以及ECGIS地理人员通过GPS与GIS联合作业获取的点位。目前伊顿县境内已有的公共土地测量系统界标中，约20%尚未被纳入本数据集。本数据集仍处于开发完善阶段，不得用于需要测量级精度的决策场景。