Description of fortification sites (e.g. fortifications built along rivers, lakes, hills, and other strategic landforms).

Geometric construction consists in the knowledge of straight and curved lines, as well as of the various bodies generated by them. The immediate aim of compound geometry is confined to conic sections and to lines of the same species.

Detailed description of the materials used and the construction techniques adopted in fortification works, with particular attention to construction methods, structural principles, and technological solutions.

When the rasant line originates from a point along the curtain, rather than from the corner between the flank and the curtain itself.

Defensive structures located outside the main body of the fortress, beyond the ditch and the bastioned front. These include tenaille works, faussebrayes, demi-lunes, hornworks, ravelins, and Epaulement.

Profiles are representations of the vertical sections of a work and serve to show those dimensions that cannot be described in plans, yet are necessary for the construction of a fortification. They may be accurately executed and constructed on a scale of thirty feet to an inch. A profile expresses the various heights, widths, and thicknesses as they would appear if the works were cut perpendicularly from top to bottom.

Part of the fortification consisting primarily of earth, attributable to a rampart earthwork.