Definition: | NEON site; Standard NEON four letter site code | NEON site and base plot ID; Unique plot ID that contains the standard NEON four letter site code and three number base plot ID | Year that LiDAR data was collected by NEON | Plot ID and LiDAR year collected; Unique NEON base plot ID and LiDAR year collected | plotID LIDAR file name; Name of the processed and clipped LiDAR file used to get FSD metrics | Plot area: area of the plot (should be close to 1600 m2) including ground points | Point density of LiDAR (pt/m2): point cloud density of LiDAR (pt/m2) | Maximum point height (m) | Rumple: Area of canopy surface relative to plot area (unitless ratio) | DGF (deep gap fraction): Fraction of 1 m2 canopy gaps in the plot (unitless) | MOCH (mean outer canopy height): Mean of maximum height (m) in 1m2 grid of plot | Maximum canopy height (m) | Top rugosity: Standard deviation of outer canopy heights in 1 m2 of plot (m) | SD(ht): Standard deviation of heights within the plot (m) | SD(SD(ht)): Plot level- standard deviation of the standard deviation of heights within 9 m2 voxels in the plot area (m) | GFP (gap fraction profile): Distribution of gaps in the point cloud 0.5 m above the ground (unitless) | VAI (vegetation area index): Sum of the 1 m horizontal slices (starting 0.5 m above the ground) of leaf area density with the plot (m2/m3) | VCI (vertical complexity index): Normalization of diversity and evenness (entropy) of 1 m height bins within the plot (unitless) | CV(ht): Coefficient of variation of heights within the plot (unitless) | Q0: 0th quantile of height (m) | Q25: 25th quantile of height (m) | Q50: 50th quantile of height (m) | Q75: 75th quantile of height (m) | Q100: 100th quantile of height (m) | FHD (foliage height diversity): Calculated from the point abundances as per voxel relative LAD values; described in MacArthur R and MacArthur J. 1961. On Bird Species Diversity. Ecology 42: 594�8. | Gini index: Calculates the Gini coefficient (GC) from unvoxelized LIDAR returns (equivalent to Gini) in Valbuena R., Maltamo M., Meht�talo L., Packalen P. (2017) Key structural features of Boreal forests may be detected directly using L-moments from airborne lidar data. Remote Sensing of Environment. 194: 437�446. https://doi.org/10.1016/j.rse.2016.10.024 | LAI (leaf area index): LAI of vegetation in canopy from 1 m above ground (units leaf area over plot area m2/m2) | LAI of subcanopy: LAI of the points from 1 to 5 m above the ground (units leaf area over plot area m2/m2) |
Measurement Values Domain: | Definition | NEON site; Standard NEON four letter site code |
| Definition | NEON site and base plot ID; Unique plot ID that contains the standard NEON four letter site code and three number base plot ID |
| | Definition | Plot ID and LiDAR year collected; Unique NEON base plot ID and LiDAR year collected |
| Definition | plotID LIDAR file name; Name of the processed and clipped LiDAR file used to get FSD metrics |
| Unit | meterSquared | Type | real | Min | 1500.1722 | Max | 1599.448318 |
| Unit | pointPerSquareMeter | Type | real | Min | 1.313265486 | Max | 54.79093992 |
| Unit | meterSquared | Type | real | Min | 2.07 | Max | 65.14 |
| Unit | dimensionless | Type | real | Min | 0 | Max | 13.42370534 |
| Unit | dimensionless | Type | real | Min | 0 | Max | 1 |
| Unit | meter | Type | real | Min | 0.789019608 | Max | 45.2294756 |
| Unit | meter | Type | real | Min | 2.07 | Max | 65.14 |
| Unit | meter | Type | real | Min | 0.326680668 | Max | 18.0834024 |
| Unit | meter | Type | real | Min | 0.293961895 | Max | 17.59262603 |
| Unit | meter | Type | real | Min | 0.107996835 | Max | 6.790072136 |
| Unit | dimensionless | Type | real | Min | 0.672495824 | Max | 0.999277457 |
| Unit | meterSquaredPerMeterCubed | Type | real | Min | 0 | Max | 17.35624171 |
| Unit | dimensionless | Type | real | Min | 0.107861374 | Max | 0.881182483 |
| Unit | dimensionless | Type | real | Min | 0.130402842 | Max | 1.681063657 |
| Unit | meter | Type | real | Min | 0.5 | Max | 5.01 |
| Unit | meter | Type | real | Min | 0.56 | Max | 32.4425 |
| Unit | meter | Type | real | Min | 0.66 | Max | 37.6835 |
| Unit | meter | Type | real | Min | 0.83 | Max | 42.465 |
| Unit | meter | Type | real | Min | 2.07 | Max | 65.14 |
| Unit | dimensionless | Type | real | Min | 0.038585127 | Max | 3.855102109 |
| Unit | dimensionless | Type | real | Min | 0.058136844 | Max | 0.682909663 |
| Unit | meterSquaredPerMeterSquared | Type | real | Min | 0.000563224 | Max | 5.078740502 |
| Unit | meterSquaredPerMeterSquared | Type | real | Min | 0 | Max | 2.490773638 |
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