TY - JOUR

T1 - Within-species benefits of back-projecting airborne laser scanner and multispectral sensors in monospecific pinus sylvestris forests

AU - Valbuena, Rubén

AU - De-Blas, Alejandro

AU - Martín-Fernández, Susana

AU - Maltamo, Matti

AU - Nabuurs, Gert-Jan

AU - Manzanera, José Antonio

PY - 2013

Y1 - 2013

N2 - Back-projecting is an alternative to orthorectification for ALS-imagery fusion. It usually assists in improving forest estimations in mixed forests, by adding species information from optical sensors. In this study, we focused on the within-species advantages obtained. Results showed that estimating relative stem density improved significantly (from R2=0.76 to R2=0.81), as the multispectral signal may incorporate canopy closure-related shadowing conditions at plot-level. As a result, volume prediction also improved (from R2=0.65 to R2=0.69), even though Lorey’s height and basal area did not. Hence, monospecific conifer forests assessment may also benefit from ALS-imagery fusion.

AB - Back-projecting is an alternative to orthorectification for ALS-imagery fusion. It usually assists in improving forest estimations in mixed forests, by adding species information from optical sensors. In this study, we focused on the within-species advantages obtained. Results showed that estimating relative stem density improved significantly (from R2=0.76 to R2=0.81), as the multispectral signal may incorporate canopy closure-related shadowing conditions at plot-level. As a result, volume prediction also improved (from R2=0.65 to R2=0.69), even though Lorey’s height and basal area did not. Hence, monospecific conifer forests assessment may also benefit from ALS-imagery fusion.

KW - Sensor data fusion

KW - Lidar

KW - stem density

KW - Stand Density Index

KW - Snag detection

KW - Forest Health

U2 - 10.5721/EuJRS20134629

DO - 10.5721/EuJRS20134629

M3 - Erthygl

VL - 46

SP - 491

EP - 509

JO - European Journal of Remote Sensing

JF - European Journal of Remote Sensing

IS - 1

ER -