{"id":"S2007006469","label":"Historical geographic information systems","description":"","source_url":"https://id.loc.gov/authorities/subjects/sh2007006469","normalized_label":"historical geographic information systems","broader":["http://id.loc.gov/authorities/subjects/sh90001880"],"aliases":["HGIS (Historical geographic information systems)","Historical GIS (Geographic information systems)"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh2007006469","provider":"lcsh","revision":"964432d62c559c5c","taxonomy_revision":"f050b5d4780b1289","title":"Historical geographic information systems","url":"/topics/S2007006469","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"4613946641819772448","address_version":"morton4x16-v1","coordinates":[0,478,33268,5120],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}