These data consist of architectural metrics obtained by segmenting and extracting 315 individual trees from terrestrial laser scanning (TLS) point clouds. Forest canopy measurements were made in April 2019, using a RIEGL VZ-400i. The data were collected in seven transects of Central Amazonian forests, located at the Biological Dynamics of Forest Fragments (BDFF) Project. The TLS point clouds were then processed using the RiSCAN PRO software version 2.9, and quantitative structure models (QSMs) of the woody structure of individual trees were developed to describe their topological, geometric and volumetric properties (Raumonen et al., 2013). Architectural metrics were then obtained from QSMs, and include DBH (diameter at breast height), tree height, trunk, branch and total tree volume, branch, trunk and total tree surface area, path fraction, asymmetry, average and maximum crown diameters, crown area and volume, crown base height and crown ratio, as well as trunk, branch and total tree length. A description of each metric can be found below. *Data structure*: *Region*: Forest site (Colosso versus Dimona sites) *Fragment size*: Fragment size (1, 10 or 100 ha) *Plot code*: Transect within the fragment. Multiple transects can be part of the same fragment *Distance from edges*: Distance of the base of a tree stem to the nearest forest fragment edge in meters *DBH*: Diameter at breast height estimates at 1.3 m height from quantitative structure modelling (QSM) *Tree height*: Total tree height of a tree in m *Total volume*: Total woody volume of trees in m3 *Trunk volume*: Woody volume of tree trunks in m3 *Branch volume*: Woody volume of tree branches in m3 *Total surface area*: Total surface area of woody components in m2 *Trunk area*: Trunk surface area in m2 *Branch area*: Total branch surface area in m2 *Path fraction*: The mean path length divided by the maximum path length of a tree. Unitless *Asymmetry*: Variable indicating volume asymmetry along the tree's vertical profile. Unitless *Average crown diameter*: Average crown diameter in m. Planar projection of the tree crown is divided into 18 cones and for each cone the maximum extent is computed and averaged over all cones *Maximum crown diameter*: Maximum horizontal crown diameter in m *Crown area*: Area of the projection's convex hull of the crown's planar in m2 *Crown volume*: Volume of the crown's convex hull in m3 *Crown base height*: Crown's base height in m from the ground *Crown ratio*: Ratio of the crown length to the tree height. Unitless *Trunk length*: Length of the stem in m *Branch length*: Total length of all the branches in m *Total tree length*: Total length of all the branches and stem in m References: Raumonen, P. et al. Fast Automatic Precision Tree Models from Terrestrial Laser Scanner Data. Remote Sensing 5, 491–520 (2013).

2023