ATL08 — Vegetation Height¶

ATL08 provides terrain and canopy heights from photon-counting lidar at 100 m segments.

Quick Start¶

using SpaceLiDAR, DataFrames

g = granule("ATL08_20201121151145_08920913_006_01.h5")
t = table(g)        # terrain (ground) heights by default
df = DataFrame(t)

Default Columns¶

Column	HDF5 Path	Type
`longitude`	`land_segments/longitude`	Float32
`latitude`	`land_segments/latitude`	Float32
`height`	`land_segments/terrain/h_te_mean`	Float32
`height_error`	`land_segments/terrain/h_te_uncertainty`	Float32
`datetime`	`land_segments/delta_time`	DateTime
`quality`	`land_segments/terrain_flg`	Bool
`phr`	`land_segments/ph_removal_flag`	Bool
`sensitivity`	`land_segments/snr`	Float32
`scattered`	`land_segments/msw_flag`	Int8
`saturated`	`land_segments/sat_flag`	Int8
`clouds`	`land_segments/layer_flag`	Bool
`height_reference`	`land_segments/dem_h`	Float32
`reflectance`	`land_segments/asr`	Float32
`nphotons`	`land_segments/n_seg_ph`	Int32
`detector_id`	attribute	—
`strong_beam`	attribute	—

Canopy Heights¶

Use atl08_canopy_variables() to read canopy height instead of terrain:

t = table(g; variables=atl08_canopy_variables())

This reads land_segments/canopy/h_mean_canopy_abs as the :height column.