Glossary

Angle: (angle) Arctan(rise/run). Measured in radians. This is the angle of the branch with the XY plane. This angle is therefore <0 when the branch is tilted away from the tree’s trunk and >0 when the branch tilted towards the trunk.
Branch Order: (branch_order) The number of junctions away from the trees’ trunk. Trunk cyls have order 0, branches sprouting directly from the trunk have order 1, branches forking from order 1 branches have order 2 etc.
Diameter at Breast Height: (DBH) The diameter of the tree at a height of 1.35 meters.
File Name: (fileName) Can be thought of as the tree name; one files = one full set of cylinders for a given tree.
Maximum Branch Order: (maxBo, max_bo) The maximum branch order present in the tree (in the cyl data).
Maximum X Coordinate: (X_max) The maximum X coordinate of the tree.
Maximum Y Coordinate: (Y_max) The maximum Y coordinate of the tree.
Maximum Z Coordinate: (Z_max) The maximum Z coordinate of the tree.
Minimum X Coordinate: (X_min) The minimum X coordinate of the tree.
Minimum Y Coordinate: (Y_min) The minimum Y coordinate of the tree.
Minimum Z Coordinate: (Z_min) The minimum Z coordinate of the tree.
Number of Drip Points: (num_drip_points) The number of points where water drips from the tree.
Order One Angle Average: (Order_one_angle_avg) The average angle of the branches with order one.
Order One Angle Standard Deviation: (Order_one_angle_std) The standard deviation of the angles of the branches with order one.
Order Three Angle Average: (Order_three_angle_avg) The average angle of the branches with order three.
Order Two Angle Average: (Order_two_angle_avg) The average angle of the branches with order two.
Order Two Angle Standard Deviation: (Order_two_angle_std) The standard deviation of the angles of the branches with order two.
Order Zero Angle Average: (Order_zero_angle_avg) The average angle of the branches with order zero.
Order Zero Angle Standard Deviation: (Order_zero_angle_std) The standard deviation of the angles of the branches with order zero.
Projected Surface Area: (total_psa) Total projected area for all cylinders of the tree.
Projected Surface Area With Overlap: (PsaWOverlap, psa_w_overlap) The sum of the projected area of each cylinder calculated independently. This is useful as it is used to exploit the fact that total_psa = psaWOverlap - (the sum of overlapping areas of the projected cylinders). This allows us to get an estimate of what portion of the canopy is shaded.
Stem Hull Area: (stem_hull_area) Area of the alpha shape (a tight boundary enclosing the stem) calculated for the tree.
Stem Hull Boundary: (stem_hull_boundary) The length of the perimeter of the stem alpha shape.
Stem Projected Surface Area: (stem_psa) Projected area for all cylinders of the stem.
Stem Projected Surface Area With Overlap: (stem_psa_w_overlap) The sum of the projected area of each stem cylinder calculated independently, including overlaps.
Stem Surface Area: (stem_surface_area) The sum of the non-projected/3D surface area of stem cylinders minus the areas of the top and bottom of the cylinder.
Top Half Shade: (topHalfShade, top_half_shade) See Top Quarter Shade.
Top Half Total Projected Surface Area: (topHalfTotPsa) The projected area of all cylinders in the top 50% of the canopy.
Top Quarter Shade: (topQuarterShade, top_quarter_shade) Total overlap area in the top 25% of the canopy; estimates the total shaded area (area of diffuse v. direct sunlight) in the highest 25% of the tree.
Top Quarter Total Projected Surface Area: (topQuarterTotPsa) The projected area of all cylinders in the top 25% of the canopy.
Top Three Quarter Shade: (topThreeQuarterShade, top_three_quarter_shade) See Top Quarter Shade.
Top Three Quarter Total Projected Surface Area: (topThreeQuarterTotPsa) The projected area of all cylinders in the top 75% of the canopy.
Total Hull Area: (tot_hull_area) Area of the alpha shape (a tight boundary enclosing the canopy) calculated for the tree.
Total Hull Boundary: (tot_hull_boundary) The length of the perimeter of the alpha shape.
Total Shade: (TotalShade) PsaWOverlap - total_psa. the sum total of the area where our cylinders overlap.
Total Surface Area: (tot_surface_area) The sum of the non-projected/3D surface area of cylinders minus the areas of the top and bottom of the cylinder.
Volume: (volume) The sum of the volumes of each cylinder.