Lidar sampling for large-area forest characterization: A review

REMOTE SENSING OF ENVIRONMENT

卷:121

Review

Wulder, Michael A.¹  White, Joanne C.¹  Nelson, Ross F.²  Naesset, Erik³  Orka, Hans Ole³  Coops, Nicholas C.⁴  Hilker, Thomas²  Bater, Christopher W.⁴  Gobakken, Terje³ 

[1] Nat Resources Canada, Canadian Forest Serv, Pacific Forestry Ctr, Victoria, BC V8Z 1M5, Canada

[2] NASAs Goddard Space Flight Ctr, Biospher Sci Branch, Greenbelt, MD 20771 USA

[3] Norwegian Univ Life Sci, Dept Ecol & Nat Resource Management, NO-1432 As, Norway

[4] Univ British Columbia, Dept Forest Resources Management, Fac Forestry, Vancouver, BC V6T 1Z4, Canada

关键词: Light detection and ranging;    Lidar;    Sampling;    Extrapolation;    Forest;    Large area;    Stratification;    Satellite;    Monitoring;   

DOI  :  10.1016/j.rse.2012.02.001

来源: Elsevier

【 摘 要 】

The ability to use digital remotely sensed data for forest inventory is often limited by the nature of the measures, which, with the exception of multi-angular or stereo observations, are largely insensitive to vertically distributed attributes. As a result, empirical estimates are typically made to characterize attributes such as height, volume, or biomass, with known asymptotic relationships as signal saturation occurs. Lidar (light detection and ranging) has emerged as a robust means to collect and subsequently characterize vertically distributed attributes. Lidar has been established as an appropriate data source for forest inventory purposes; however, large area monitoring and mapping activities with lidar remain challenging due to the logistics, costs, and data volumes involved. The use of lidar as a sampling tool for large-area estimation may mitigate some or all of these problems. A number of factors drive, and are common to, the use of airborne profiling, airborne scanning, and spaceborne lidar systems as sampling tools for measuring and monitoring forest resources across areas that range in size from tens of thousands to millions of square kilometers. In this communication, we present the case for lidar sampling as a means to enable timely and robust large-area characterizations. We briefly outline the nature of different lidar systems and data, followed by the theoretical and statistical underpinnings for lidar sampling. Current applications are presented and the future potential of using lidar in an integrated sampling framework for large area ecosystem characterization and monitoring is presented. We also include recommendations regarding statistics, lidar sampling schemes, applications (including data integration and stratification), and subsequent information generation. Crown Copyright (c) 2012 Published by Elsevier Inc. All rights reserved.

【 授权许可】

Free