Half Sections

This data set contains polygons that represent half sections. In 1985, Ramsey County began a 5 year project to modernize it's land records mapping system to create a computerized Land Information System. As part of the project, the County developed an accurate coordinate control base for this mapping system. The 27 existing State and Federal first order accuracy positions in Ramsey County were densified by a GPS (Global Positioning System) Network of 171 second order accuracy positions. These positions were established and recorded on existing public land survey corner monuments and accessory monuments through out the county.本数据集包含表征半区块的多边形要素。1985年，拉姆西县启动一项为期五年的项目，对其土地记录测绘系统进行现代化升级，以构建计算机化土地信息系统（Land Information System）。作为该项目的组成部分，该县为这套测绘系统搭建了高精度坐标控制基准。拉姆西县境内原有27个州级及联邦级一等精度控制点，通过由171个二等精度点位构成的全球定位系统（Global Positioning System）网络完成了加密。这些控制点均布设并标记于全县范围内现存的公共土地测量界碑及附属界碑之上。