Concord is a locality and its consensus geometry is derived from whosonfirst.
{"wof:statistical_gore":1,"mz:is_ceased":0,"geom:latitude":41.366544,"wof:name":"Concord","counts:names_total":1,"wof:placetype":"locality","mz:is_current":1,"wof:hierarchy":[{"continent_id":102191575,"country_id":85633793,"county_id":102082267,"localadmin_id":404497381,"locality_id":1729434701,"region_id":85688697}],"mz:is_deprecated":0,"mz:min_zoom":30,"lbl:latitude":41.372587,"geom:area":0.009628,"geom:longitude":-89.683181,"wof:id":1729434701,"geom:type":"Polygon","wof:lastmodified":1613765618,"wof:belongsto":[102191575,85633793,102082267,404497381,85688697],"mps:latitude":41.372587,"wof:repo":"whosonfirst-data-admin-us","src:geom":"whosonfirst","wof:country":"US","counts:names_preferred":1,"geom:area_square_m":8.9345886860288E7,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"US","src:geom_via":"uscensus","counts:names_languages":1,"geom:bbox":"-89.74208,41.321665,-89.625635,41.409161","name:eng_x_preferred":["Concord"],"mps:longitude":-89.683185,"src:lbl_centroid":"mapshaper","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-89.683185,"wof:geomhash":"3a8589e320352b6a4bda83d5a65de0e5","wof:parent_id":404497381,"wof:placetype_names":["locality"],"mz:hierarchy_label":1,"wof:placetype_id":102312317,"edtf:cessation":"uuuu"}