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                    <gmx:Anchor xlink:href="http://data.europa.eu/eli/reg/2010/1089">REGOLAMENTO (UE) N. 1089/2010 DELLA COMMISSIONE del 23 novembre 2010 recante attuazione della direttiva 2007/2/CE del Parlamento europeo e del Consiglio per quanto riguarda l'interoperabilità dei set di dati territoriali e dei servizi di dati territoriali</gmx:Anchor>
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                        <gco:Date>2010-12-08</gco:Date>
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            <gco:CharacterString>Lo shapefile "Aree_boscate_2019_1954.shp" e "Aree_boscate_veg_rada_1954.shp" sono rappresentati in forma poligonale
seguendo il principio che ha portato alla redazione dell'ELABORATO 7B -- "Ricognizione, delimitazione e rappresentazione delle aree tutelate per legge ai sensi dell'art. 142 del Codice" (https://www.regione.toscana.it/documents/10180/12605520/7B+Ricognizione+e+delimitazione.pdf), relativamente ai "territori coperti da foreste e da boschi" (art.142. c.1, lett. g, Codice), nell'archivio UCS2019 sono stati selezionati i poligoni appartenenti alle seguenti classi:
31
    -- 311 Boschi di latifoglie
    -- 312 Boschi di conifere
    -- 313 Boschi misti di conifere e latifoglie
32
    -- 322 Brughiere e cespuglieti
    -- 323 Aree a vegetazione sclerofilla
    -- 324 Aree a vegetazione boschiva ed arbustiva in evoluzione
33
    -- 3331 Cessa parafuoco
    -- 334 Aree percorse da incendi*

Sui poligoni sopra riportati, appartenenti alle classi di Uso del Suolo relative all'ultimo aggiornamento eseguito con le OFC 2019, e' stata fatta una fotointerpretazione con le OFC 1954 (volo GAI, OFC 1954 10K proprieta' IGM-RT esecuzione del volo Gruppo Aereo ita).

In particolare l --- archivio di impianto e quindi i due shapefile (separati per una migliore lettura) e' stato realizzato in due processi distinti:

Fase 1  -- Individuazione delle classi di uso del suolo 1954 nei soli poligoni a bosco
In queste aree sono stati fotointerpretati gli eventuali cambiamenti riscontrati nel 1954: in particolare, i poligoni che non erano aree boscate al 1954 sono stati codificati secondo una classificazione semplificata. La disomogeneita' della qualita' dei fotogrammi del volo 1954, infatti, non consente di definire un dettaglio della legenda UCS che, ricordiamo, segue la classificazione gerarchica del Corine Land Cover, fino ai livelli 3 e 4. Per tutte le classi quindi, il livello di approfondimento si e' fermato al primo. La legenda utilizzata e' stata la seguente:
1  Territori modellati artificialmente
2  Superfici agricole utilizzate
3  Territori boscati e ambienti semi-naturali
4  Zone umide
5  Corpi idrici
Le aree che nel 1954 sono bosco e cespuglieti, rappresentano quelle porzioni di territori dove e' abbastanza sicuro che ci sia stata una permanenza della copertura boschiva o arbustiva. Le aree codice 2 sono quelle di maggior interesse per una lettura delle trasformazioni del paesaggi agrari e pastorali (vedi art. 80 bis del 48/R).

Fase 2 -- estensione della classe 3 (aree boscate) presente al 1954 e poi trasformate in altro 
Durante la fotointerpretazione dei poligoni con le OFC1954 sono state individuate anche tutte quelle porzioni di copertura forestale o arbustiva presenti al 1954, ma scomparsi nei decenni successivi fino ad oggi: ad esempio, porzioni di bosco trasformati in aree agricole. Tali poligoni sono state codificate con codice 0, mentre la persistenza (delle zone codificate come aree boscate al 1954 e anche al 2019) e' classificata con un codice 3.</gco:CharacterString>
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