Boethius, On Geometry (with other geometrical works)

...the angustalis narrow boundary. And from the other long side, a doubled breath. These two greatest boundaries are called the decumanus east-west line and the cardo north-south line, and they meet for many thousands of feet. And unless they have made them on rough ground, they divide the fields; then the places that are contained between them by straight lines. Every measurement of this cultivation ought to make the mode either longer or wider, and that which is longer in breadth is called a scamnum a rectangular plot broader than it is long, and that which is longer in length is a striga a rectangular plot longer than it is broad.

A rectangular diagram outlined in red ink is divided into several internal compartments containing Latin text and symbols. The top row contains three sections labeled 'SCAMNUM', 'STRIGA', and 'SCAMNUM'. The lower sections contain various abbreviations and symbols including 'S C A M V', 'STRIGA', and 'STRIGA'.

The estates are nearly joined, and for the sake of the estimate of freedom, they are even narrower. Places are enclosed in one [boundary] by a dry wall. There are places under the ass which do not pertain to ordinary law. If it is agreed among the possessors, they possess it; if it is not agreed, it remains to be provided.

A rectangular diagram outlined in red ink is divided into three horizontal sections. The left and right sections are labeled 'Locus' [Place]. The middle section contains smaller text: 'ager exclusus subasivus' [excluded under-the-ass field].

A small red triangle contains the text 'ager prefecturae' [prefecture field].

Other places are the prefecture, which pertain to public law; as many as it is agreed upon by these possessors, they possess. These are, however, the public places that have these.