Of course Frisius had ample reason to promote and improve the potential of the Cosmographia for he was a maker of instruments and Cosmographia was a work in which Apian had described and illustrated a wide range of mathematical instruments which were available from Frisius ' workshop.
Ng mga kurso Frisius may sapat na dahilan upang itaguyod at mapabuti ang potensyal ng Cosmographia para siya ay gumagawa ng instrumentong Cosmographia at noon ay isang trabaho na kung saan Apian had inilarawan at larawan ng isang malawak na hanay ng mga matematiko instrumento na magagamit mula sa Frisius' workshop.