Original Minute Plans MFA

The “Original Minute Plans MFA” (Mensuration fédérale ancienne) were created on cardboard carriers in the format 100/70 cm. These are semi-graphic surveys. They were drawn up, according to the first guidelines at federal level, from 1911 and until the 1940s. A so-called “civil” coordinate system, which originated at the Bern Observatory, was transferred to each minute schedule. Subsequently, a network of base points (polygonals) was determined by polar (vectorial) measurements, calculated and transferred to the coordinate system. On this basis, the detail points (border and situation points) were determined and transmitted by orthogonal or polar measurements. These documents made it possible to create the land register plans MFA by reproduction. The minute plans reflect the land register situation at the time of its creation and have not been followed up. Prior to their archiving, they were scanned, they are available on part of the territory of the canton of Freiburg.「原始分幅地籍图MFA」（法语原称：Mensuration fédérale ancienne）以100×70厘米的硬纸板为载体制作而成，属于半图形化测量成果。其编制工作遵循联邦层面首部官方规范开展，时间跨度为1911年至20世纪40年代。每幅分幅图均采用源自伯尔尼天文台的所谓‘民用’坐标系。随后，通过极坐标（矢量）测量确定多边形控制点网，经解算后将其纳入该坐标系。在此基础上，通过正交测量或极坐标测量确定并标注细部点（界址点与地形点）。借助此类档案资料，可通过复刻手段制作地籍登记专用MFA图件。该批分幅图如实呈现了成图当时的地籍现状，且未进行后续修测更新。在归档入库前，这批图纸已完成数字化扫描，目前可在弗莱堡州（Canton of Freiburg）部分辖区内获取。