The Description of the Whole by Planisphere.
THis way of Description rendreth the face of the Earth upon a Plain in its own proper Figure Sphe∣rically, as upon the Globe it self, the gibbositie onely allowed for: Sed quicunque (saith Bertius) Globum Terrae instituerit in plano describere, deprehendet fieri id uno circuli ambitu non posse.
As near to a Circle, as it might, Ortelius and others have described it upon one Face. I have seen it don upon four Ovals, but keeping touch with the Nature of a Circle, and of the sphere it self, it cannot well bee contrived upon so few as one, or more then two.
Suppose then the Globe to bee divided into two equal parts or Hemispheres. This you know cannot bee don but by a great Circle. And therefore it must bee don by the Equa∣tor or Meridian, for (the Colure is all one with the Meri∣dian) the Horizon cannot fix, and the Zodiack hath nothing to do here. Res est admodum impedita (saith the same Ber∣tius) & per quam difficilis orbem terrarum ejúsque partes descri∣bere, & quod in natura cernitur exactè in Globo, aut tabula spe∣ctandum repraesentare observato partium omnium situ & figura, &c. cum suis Longitudinibus, Latitudinibus, Intervallis, & respectu ad partes Coeli, prima & naturae proxima ratio est Spherica: Se∣cunda ea, quae ad Sphaeram maximè accedit ducta in plano, vel Tabula, quam idcirco vulgus Planisphaerium vocat. Sunt autem ejus modi duo. Ʋnus qui Sphaeram secat in Equatore, & duo efficit Hemisphaeria plana quorum in singulis Polus centri loco est. Circulus autem Equinoctialis loco peripheriae. Alter, qui Sphae∣ram secat. In aliquo Meridiano ita ut Poli in singulis Hemi∣sphaeriis