8 ▁modern ▁const ell ations , ▁there ▁are ▁ 1 5 ▁Dutch - created ▁const ell ations , ▁including ▁ 1 2 ▁southern ▁const ell ations . Sim pson , ▁Phil ▁( 2 0 1 2 ): ▁Guide book ▁to ▁the ▁Const ell ations : ▁T eles cop ic ▁S ights , ▁T ales , ▁and ▁M yth s , ▁p . ▁ 5 5 9 – 5 6 1 , ▁p . ▁ 5 9 9 – 6 0 0 ▁ ▁F ris ius , ▁S nell , ▁and ▁the ▁rise ▁of ▁tri ang ulation ▁as ▁a ▁map making ▁method ▁ ▁Tri ang ulation ▁had ▁first ▁emer ged ▁as ▁a ▁map - making ▁method ▁in ▁the ▁mid ▁six teenth ▁century ▁when ▁Gem ma ▁F ris ius ▁set ▁out ▁the ▁idea ▁in ▁his ▁Lib ell us ▁de ▁loc orum ▁descri b endor um ▁r ation e ▁( Book let ▁concerning ▁a ▁way ▁of ▁describing ▁places ). St ach ur ski , ▁Richard ▁( 2 0 0 9 ). ▁Long itude ▁by ▁W ire : ▁F inding ▁North ▁America , ▁p . ▁ 1 0 Bag row , ▁Leo ▁( 2 0 1 0 ). ▁History ▁of ▁Cart ography , ▁p . ▁ 1 5 9 B ell os , ▁Alex ▁( 2 0 1 4 ). ▁The ▁G rap es ▁of ▁Math : ▁How ▁Life ▁Ref lect s ▁Num bers ▁and ▁Num bers ▁Ref lect ▁Life , ▁p . ▁ 7 4 ▁Dutch ▁cart ograph er ▁Jacob ▁van ▁De vent er ▁was ▁among