units

Here is a subset of controlled unit terms for Environmental Systems Science (ESS) samples, using existing ontology terms from Units Ontology (UO) link to ontology term details (IRI for term).

Please provide feedback on any additional unit terms needed.

Unit category	Unit Label	UO ID
length	meter	http://purl.obolibrary.org/obo/UO_0000008
length	centimeter	http://purl.obolibrary.org/obo/UO_0000015
length	millimeter	http://purl.obolibrary.org/obo/UO_0000016
length	micrometer	http://purl.obolibrary.org/obo/UO_0000017
area	square meter	http://purl.obolibrary.org/obo/UO_0000080
area	square centimeter	http://purl.obolibrary.org/obo/UO_0000081
area	square millimeter	http://purl.obolibrary.org/obo/UO_0000082
area	square micrometer	http://purl.obolibrary.org/obo/UO_0010001
mass	kilogram	http://purl.obolibrary.org/obo/UO_0000009
mass	gram	http://purl.obolibrary.org/obo/UO_0000021
mass	milligram	http://purl.obolibrary.org/obo/UO_0000022
mass	microgram	http://purl.obolibrary.org/obo/UO_0000023
mass	nanogram	http://purl.obolibrary.org/obo/UO_0000024
mass	picogram	http://purl.obolibrary.org/obo/UO_0000025
volume	cubic meter	http://purl.obolibrary.org/obo/UO_0000096
volume	cubic centimeter	http://purl.obolibrary.org/obo/UO_0000097
volume	cubic decimeter	http://purl.obolibrary.org/obo/UO_0000100
volume	milliliter	http://purl.obolibrary.org/obo/UO_0000098
volume	liter	http://purl.obolibrary.org/obo/UO_0000099
volume	nanoliter	http://purl.obolibrary.org/obo/UO_0000102
volume	picoliter	http://purl.obolibrary.org/obo/UO_0000103