ome
deca SI prefix is missing from the list of units.
Units for "space" axes: angstrom, attometer, centimeter, decimeter, exameter, femtometer, foot, gigameter, hectometer, inch, kilometer, megameter, meter, micrometer, mile, millimeter, nanometer, parsec, petameter, picometer, terameter, yard, yoctometer, yottameter, zeptometer, zettameter
Units for "time" axes: attosecond, centisecond, day, decisecond, exasecond, femtosecond, gigasecond, hectosecond, hour, kilosecond, megasecond, microsecond, millisecond, minute, nanosecond, petasecond, picosecond, second, terasecond, yoctosecond, yottasecond, zeptosecond, zettasecond
The "deca" prefix is missing in this list of units. A "decameter" is 10 meters. A "decasecond" is 10 seconds.
1e-24 yoctosecond
1e-21 zeptosecond
1e-18 attosecond
1e-15 femtosecond
1e-12 picosecond
1e-09 nanosecond
1e-06 microsecond
1e-03 millisecond
1e-02 centisecond
1e-01 decisecond
1e+00 second
1e+01 decasecond
1e+02 hectosecond
1e+03 kilosecond
1e+06 megasecond
1e+09 gigasecond
1e+12 terasecond
1e+15 petasecond
1e+18 exasecond
1e+21 zettasecond
1e+24 yottasecond
OME-Zarr delegates this decision to UDUNITS-2, which does not include deca*. For the sake of simplicity/ standardisation, it would be nice to avoid taking ownership of any more lists.
If anything, I'd prefer to push towards having fewer units, not more - we have coordinate transformations for scaling values up and down. But implementations which use floats of limited precision would probably struggle at the yocto/ yotta end of the scale.
OME-Zarr delegates this decision to UDUNITS-2, which does not include deca*. For the sake of simplicity/ standardisation, it would be nice to avoid taking ownership of any more lists
UDUNITS-2 spells it as "deka". That is included in the link you provided.
https://cfconventions.org/Data/cf-conventions/cf-conventions-1.7/build/ch03.html
on that topic, for me it would be more intuitive if units are sorted on the spec by their factor instead of alphabetically
