Congressi Nazionali SISEF

*

Presentazione orale

Travaglini D, Bottalico F, Chirici G, Puletti N, Nocentini S, Barbati A, Giannetti F, Corona P

Developing k-NN assisted procedures to assess quantitative attributes of forest stands

Riassunto: The aim of this study is to develop procedures for the estimation and mapping of quantitative forest attributes coupling forest inventory data, satellite imagery and other ancillary information, like digital elevation model. The values of quantitative attributes measured in the field by sample plots are extended over the whole forest area using k-Nearest Neighbors (k-NN) assisted procedures. Distinctively several procedures for the local optimization of k-NN are tested contrasting the use of raw spectral information of satellite bands and the use of their principal components. The accuracy of k-NN estimates are calculated for the different algorithm configurations in terms of number of k, type of multispectral distance and use of raw data or different numbers of first principal components. Then, large area assessment is performed by estimator unbiasedly aggregating pixel-level k-NN estimates. The proposed procedure is tested in the southern part of the Piedmont Region (Italy) over a forest area of about 4000 km2, with reference to the assessment of basal area of forest stands and with respect to different levels of administrative units. The obtained k-NN assisted estimates are compared with the Horvitz-Thompson estimates.

Citazione: Travaglini D, Bottalico F, Chirici G, Puletti N, Nocentini S, Barbati A, Giannetti F, Corona P (2009). Developing k-NN assisted procedures to assess quantitative attributes of forest stands. In: VII Congresso Nazionale SISEF “Sviluppo e adattamento, naturalità e conservazione: opportunità per un sistema forestale in transizione“ (Università degli Studi del Molise, Isernia - Pesche (IS), 29 Settembre - 3 Ottobre 2009), Abstract-book, Contributo #c07.1.5. - [online] URL: https://congressi.sisef.org/?action=paper&id=1306

Dettagli

Congresso VII Congresso Nazionale SISEF
“Sviluppo e adattamento, naturalità e conservazione: opportunità per un sistema forestale in transizione”
Università degli Studi del Molise, Isernia - Pesche (IS), 29 Settembre - 3 Ottobre 2009
Collocazione c07.1.5 (#)
Sessione Sessione 01
Moderatore/i Massimo Bianchi, Piermaria Corona
Data Sep 29, 2009
Ora 17:00-19:00
Luogo -
Info Autori
(*): speaker

D Travaglini*
DISTAF, Università di Firenze
Italy

F Bottalico
DISTAF, Università di Firenze
Italy

G Chirici
Dipartimento STAT, Università degli Studi del Molise
Italy

N Puletti
DISTAF, Università di Firenze
Italy

S Nocentini
DISTAF, Università di Firenze
Italy

A Barbati
DISAFRI, Università della Tuscia, Viterbo
Italy

F Giannetti
IPLA, Torino
Italy

P Corona
DISAFRI, Università della Tuscia, Viterbo
Italy