{"aspect_id":"AS3","aspect_name":"length","aspect_reference":"https://si-digital-framework.org/quantities/LENG","aspect_symbol":null,"name":"length chain (U.S. survey foot)","scale_id":"SC987","scale_name":null,"scale_symbol":null,"scale_type":"ratio","symbol":null,"unit_id":"UN1028","unit_name":"chain (U.S. survey foot)","unit_reference":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8#C","unit_symbol":"ch"}