ivert classes

List the ICESat-2 photon classification codes and their meanings. These are the codes IVERT assigns to photons during classification and that you use when filtering photons — for example with the --classes option of ivert database download, ivert database export, and ivert validate.

ivert classes

This command takes no options. It prints the current code table:

Code	Description
0	Noise (if enabled)
1	Ground (ATL08)
2	Canopy (ATL08)
3	Top Canopy (ATL08)
6	Land Ice (ATL06)
7	Buildings (Dynamic Algo / Bing Mask)
40	Seafloor (ATL24 / Dynamic Algo)
41	Nearshore Water Surface (ATL24 / Dynamic Algo)
42	Inland Water Surface (ATL13 / Dynamic Algo)
44	Open Ocean Surface (ATL12 / Geoid Fallback)
-1	Unclassified

The definitions are read from the globato ICESat-2 reader, so they always match the classifier IVERT uses. Run ivert classes to see the authoritative list for your installed version.

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Example

# List the photon class codes, then download only ground and seafloor photons
ivert classes
ivert database download -c 1/40 -- -74.0/-73.0/40.5/41.0