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Table 4 ALS derived crown structure and AGB estimates where N is number of crowns, \(\overline{Z}\) is mean height, \(\overline{Ar}\) is mean projected crown area, \(\sum {Ar}\) is sum of projected crown area

From: Estimating urban above ground biomass with multi-scale LiDAR

Location N \({\overline{Z}}\) (m) \({\sum _{Ar}}\) (m\(^{2}\)) \({\overline{Ar}}\) (m\(^{2}\)) AGB (Mg ha–1)
Local Borough-wide
Local
 Russell Square 88 (1.44) 17.2 (0.83) 15137.9 (0.95) 172.0 (0.70) 189.9 ± 12.1 (0.94) 164.7 ± 9.0 (0.85)
 Malet Street 25 (0.96) 20.1 (1.02) 3905.1 (0.80) 156.2 (0.93) 96.6 ± 6.7 (0.81) 139.1 ± 8.1 (0.77)
 St Pancras 70 (0.72) 22.6 (0.92) 18233.9 (0.92) 260.5 (1.21) 214.6 ± 13.3 (0.88) 204.3 ± 8.1 (0.79)
 Highgate 84 (0.76) 15.8 (0.99) 3477.2 (0.60) 41.4 (1.13) 158.1 ± 45.7 (0.57) 238.5 ± 47.8 (0.49)
Borough-wide
 Russell Square 98 (1.61) 18.2 (0.88) 14495.7 (0.91) 147.9 (0.60) 181.9 ± 10.9 (0.90) 164.1 ± 9.7 (0.85)
 Malet Street 28 (1.08) 20.3 (1.03) 3846.2 (0.79) 137.4 (0.82) 95.1 ± 7.7 (0.76) 140.0 ± 9.4 (0.78)
 St Pancras 98 (1.01) 20.7 (0.84) 17721.4 (0.89) 180.8 (0.84) 208.5 ± 16.3 (0.85) 202.5 ± 10.5 (0.78)
 Highgate 40 (0.36) 15.6 (0.98) 3809.2 (0.66) 95.2 (2.59) 164.9 ± 15.9 (0.60) 219.1 ± 18.8 (0.45)
  1. Values in parentheses indicate the fraction compared to TLS estimated values where > 1 suggests an ALS overestimate and vice versa
  2. Different parameters sets (derived locally or Borough-wide) were used when segmenting crowns (see Eqs. 1, 2 and Fig. 3)