Tree Structure Shapefile/KMZ file attributes Data Field |Description (units) |Format supersite |AusCover calibration/validation site |Text obs_time |Date and time of observation |Date Time Stamp longitude |Longitude of tree location. Typically refers to plot centre, standard AusCover variable radius plots. Can refer to individual tree for full surveys, as in belt and fixed radius plots (decimal degrees) |Float latitude |Latitude of tree location. Typically refers to plot centre, standard AusCover variable radius plots. Can refer to individual tree for full surveys, as in belt and fixed radius plots (decimal degrees) |Float observers |Names of field observers |Text factor |Basal area wedge factor used for tree selection for variable radius plots |Float transect_type |Categorical descriptor of sampling method – variable radius refers to standard AusCover protocol, belt or fixed radius refers to full surveys |Text tree |Tree identifier |Integer live_dead |Categorical data –live/dead |Text dbh_30 |Diameter of trunk at 30 cm height from foot of tree (cm) |Integer height_first_branch |Height from ground to lowest main branch, ignoring split trunk stems (m) |Float height |Height of tree (m) |Float crown_x |Diameter of major crown axis (m) |Float crown_y |Diameter of axis perpendicular to major crown axis (m) |Float trunk | |Float bark |Categorical descriptor of bark (smooth, rough, peeling) |Text species |Species if known |Text photo |Photo name for THREDDS imagery |Text obs_key |Unique identifier of site and visit for data management purposes |Text