Tree ID | Unique tree number |
Distance (ft/m) and direction (degrees) from plot center or TMPz | Used to identify and locate trees for future measurements; TMP is tree measurement point (Table 1) |
Species codey (A, C, E, S, V) | Species code from standard list currently containing over 10,000 tree and shrub species |
Number of dbhs recordedy | For multistemmed trees |
Dbhy (C, S) | Diameter at breast height (in/cm) for all recorded stems |
Dbh measurement height | Recorded if dbh is not measured at 1.37 m (4.5 ft) |
Total heighty (A, C, E, S, V) | Height to top of tree (ft/m) |
Height to crown basey (A, S, V) | Height to base of live crown (ft/m) |
Crown widthy (A, S, V) | Recorded by two measurements: N-S (north–south) and E-W (east–west) widths (ft/m) |
Percent canopy missingy (A, S, V) | The percent of the crown volume that is not occupied by leaves; two perpendicular measures of missing leaf mass are made and the average result is recorded; recorded to nearest 5% |
Diebacky (C,E, S) | Percent crown dieback to nearest 5% |
Percent impervious beneath canopy (H) | Percent of land area beneath entire tree canopy’s drip line that is impervious |
Percent shrub cover beneath canopy (H) | Percent of land area beneath canopy drip line that is occupied by shrubs |
Crown light exposurey (C, S) | Number of sides of the tree receiving sunlight from above; used to estimate competition and growth rates |
Distance (ft/m) and direction (degrees) to space-conditioned residential buildingsy (E) | Measured for trees at least 6.1 m (20 ft) tall and within 18.3 m (60 ft) of structures three stories or less in height |
Street tree | Y/N; used to estimate proportion of population that is street trees |
Tree status | Indicates if tree is new or removed from last measurement period |