The GeoSPARQL object property geo:hasLength relates (spatial) objects to datums that provide length with number and unit of measure. lis:hasQualityQuantifiedAs is suitable as a superproperty in an alignment with GeoSPARQL data that includes geo:hasLength relationships.
This relation is suitable as the top node in a taxonomy of "shortcut" relations that relate objects directly to quality datums, leaving the quality implicit.