Determining the location of a point by forming triangles to it from known points

Fabrica et vsvs instrvmenti chorographici: qvo mira facilitate describuntur regiones et singulae partes earum, veluti montes, vrbes, castella, pagi, propugnacula, & similia. Additae svnt, praeter duo instrumenta homogenea, XV. formae aenea, fabricam & usum instrumentorum quasi in synopsi proponentes / Omnia germanicè descripta à Leonharto Zvblero, et latio donata ac recognita, ad communem chorographiae studiosorum usum, à Casparo Wasero. Tig.

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