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Titolo:
CALIBRATING PHOTO-INTERPRETED FOREST COVER TYPES AND RELATIVE SPECIESCOMPOSITIONS TO THEIR GROUND EXPECTATIONS
Autore:
MAGNUSSEN S;
Indirizzi:
CANADIAN FORESTRY SERV,NAT RESOURCES CANADA,506 W BURNSIDE VICTORIA BC V8Z 1M5 CANADA
Titolo Testata:
Canadian journal of forest research
fascicolo: 4, volume: 27, anno: 1997,
pagine: 491 - 500
SICI:
0045-5067(1997)27:4<491:CPFCTA>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
MODELS; ERROR; SCALE; AREA; CLASSIFICATIONS; REPRESENTATION; SPATIALISATION; AGREEMENT; INVENTORY; ACCURACY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
56
Recensione:
Indirizzi per estratti:
Citazione:
S. Magnussen, "CALIBRATING PHOTO-INTERPRETED FOREST COVER TYPES AND RELATIVE SPECIESCOMPOSITIONS TO THEIR GROUND EXPECTATIONS", Canadian journal of forest research, 27(4), 1997, pp. 491-500

Abstract

Forest inventories gather data from many sources at different scales and resolutions. A common reference level and scale is needed to assess quality and accuracy of an inventory. This study demonstrates, with data from New Brunswick, a procedure for calibration of photo interpretations of cover types and relative species composition (by volume) tothe expected ground values. The species volume composition was calibrated with a synthetic contingency table because of the lack of a one-to-one object linkage in the two sets of estimates. Generally, the agreement between photo estimates and ground estimates was weak to poor (kappa average of 0.3), when adjusted for chance agreement. Different scales, resolutions, and points of observations all contribute to these results. Calibrations resulted in significant shifts in cover types and species compositions and enlarged the associated standard errors by 10-300%.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 07:56:28