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Dall'immagine al modello Note sulla cartografia geometrica in Italia ...

Dall'immagine al modello Note sulla cartografia geometrica in Italia ...

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Vagnetti L., Lo studio di Roma negli scritti <strong>al</strong>bertiani, <strong>in</strong> Convegno <strong>in</strong>ternazion<strong>al</strong>e <strong>in</strong>detto nel V centenario di Leon Battista Alberti, Roma-Mantova-Firenze, 25-29 aprile 1972, Roma, Accademia Nazion<strong>al</strong>e dei L<strong>in</strong>cei, Quaderno n. 209, Roma, 1974<strong>al</strong>l’orientamento dei vari poligoni rilevati.Il secondo saggio, Descriptio urbis Romae, offre <strong>al</strong>la <strong>cartografia</strong>un contributo decisamente orig<strong>in</strong><strong>al</strong>e, attraverso l’illustrazionedel metodo di restituzione grafica di una pianta urbana percoord<strong>in</strong>ate polari, raccolte ed ord<strong>in</strong>ate <strong>in</strong> apposite griglie otabelle.Lo strumento ideato per la costruzione di t<strong>al</strong>i griglie dicoord<strong>in</strong>ate è ancora un goniometro, chiamato Orizon e dotatodi un raggio graduato, chiamato Radius, <strong>in</strong>cernierato nelLeon Battista Alberti,Descriptio urbis RomaeLeon Battista Alberti,Description of the town of Romere<strong>al</strong>ised on precious papers, often enriched with exquisiteworkmanships and sophisticated gold decorations. It got onthe bookshelves of the most famous and powerful importantmen of the time (such as P<strong>al</strong>la Strozzi, Lorenzo de’ Medici,Federico da Montefeltro, Alfonso d’Aragona, Borso d’Este, thePope Gregorio XII), together with those of many scholars.With this <strong>in</strong>creas<strong>in</strong>g popularity of the text, a new richeditori<strong>al</strong> activity beg<strong>in</strong>s. Florence becomes the heart of theproduction of diff erent k<strong>in</strong>ds of Ptolemaic Atlases and thistrend spreads to other towns <strong>in</strong> the whole Europe. That’s thestart of a fl ourish<strong>in</strong>g market of maps (even on s<strong>in</strong>gle sheets),<strong>in</strong>creased by the <strong>in</strong>terest of a lot of collectors and those keen onthe subject. The ch<strong>al</strong>cography from a pr<strong>in</strong>ted sample broadenseven more this tendency. Everyth<strong>in</strong>g started when a French59

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