Area-based parameterization of forest structure using full-waveform airborne laser scanning data
نویسندگان
چکیده
Small-footprint airborne laser scanning (ALS) is increasingly used in vegetation and forest related applications. This paper explores the potential of full-waveform (FWF) ALS information (i.e. echo width and backscatter cross section) for tree species classification and forest structure parameterization. In order to obtain defined physical quantities, radiometric calibration of the recorded FWF data is performed by using a natural radiometric reference target (asphalt road). Based on a segmentation of the canopy surface, descriptive statistical values of laser echo attributes are derived and attached to the segment polygons, which represent large crown parts or even single trees. We found that average segment-based values of echo width and cross section are well suited to separate larch from deciduous trees (i.e. oak and beech). Additionally, the vertical distribution of the FWF information within a segment is specific for each tree species. On forest stand level a visual agreement of the segment-based FWF values with forest inventory reference data exists. We expect that with further investigation on the laser beam’s interaction with vegetation calibrated FWF information can assist tree species classification and forest inventory.
منابع مشابه
Assessment of Low Density Full-Waveform Airborne Laser Scanning for Individual Tree Detection and Tree Species Classification
The paper investigated the possible gains in using low density (average 1 pulse/m 2 ) full-waveform (FWF) airborne laser scanning (ALS) data for individual tree detection and tree species classification and compared the results to the ones obtained using discrete return laser scanning. The aim is to approach a low-cost, fully ALS-based operative forest inventory method that is capable of provid...
متن کاملAlgorithms and Methods of Airborne Laser Scanning for Forest Measurements
Extracting forest variables from airborne laser scanner has less than 10 years of history. During that time, however, a new area in the field of forest studies has emerged. This paper describes existing algorithms and methods of airborne laser scanning that are used for forest measurements. The methods are divided into the following categories: 1) extraction of DTM (digital terrain model), 2) e...
متن کاملRobust characterization of forest canopy structure types using full-waveform airborne laser scanning
متن کامل
Aboveground Biomass Estimation of Individual Trees in a Coastal Planted Forest Using Full-Waveform Airborne Laser Scanning Data
The accurate estimation of individual tree level aboveground biomass (AGB) is critical for understanding the carbon cycle, detecting potential biofuels and managing forest ecosystems. In this study, we assessed the capability of the metrics of point clouds, extracted from the full-waveform Airborne Laser Scanning (ALS) data, and of composite waveforms, calculated based on a voxel-based approach...
متن کاملFull-Waveform Airborne Laser Scanning in Vegetation Studies—A Review of Point Cloud and Waveform Features for Tree Species Classification
In recent years, small-footprint full-waveform airborne laser scanning has become readily available and established for vegetation studies in the fields of forestry, agriculture and urban studies. Independent of the field of application and the derived final product, each study uses features to classify a target object and to assess its characteristics (e.g., tree species). These laser scanning...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008