Chalkias is a locality and its consensus geometry is derived from geonames.
{"gn:population":0,"name:ell_x_preferred":["Chalkiás"],"geom:latitude":37.35407,"gn:name":"Chalkiás","wof:name":"Chalkias","counts:names_total":4,"gn:feature_code":"PPL","gn:admin3_code":"9256","gn:feature_class":"P","mz:is_current":-1,"wof:hierarchy":[{"continent_id":102191581,"country_id":85633171,"locality_id":1327462215,"region_id":85684643}],"gn:dem":640,"mz:min_zoom":12,"lbl:min_zoom":13.5,"geom:area":0,"gn:admin2_code":"40.0","gn:latitude":37.35407,"gn:asciiname":"Chalkias","lbl:bbox":"21.85409,37.33407,21.89409,37.37407","counts:concordances_total":1,"gn:country_code":"GR","geom:type":"Point","wof:lastmodified":1566640532,"gn:admin1_code":"ESYE25","wof:belongsto":[102191581,85633171,85684643],"wof:repo":"whosonfirst-data-admin-gr","wof:country":"GR","counts:names_preferred":1,"geom:area_square_m":0,"counts:names_variant":3,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"GR","geom:bbox":"21.87409,37.35407,21.87409,37.35407","wof:superseded_by":[],"wof:geomhash":"5e7bd841eb6acd6db3bdc2eea39db520","name:und_x_variant":["Khalkiá","Khalkiás"],"wof:placetype_id":102312317,"mz:is_ceased":0,"lbl:max_zoom":18,"wof:placetype":"locality","gn:longitude":21.87409,"mz:is_deprecated":0,"gn:modification_date":"2016-07-05","geom:longitude":21.87409,"wof:id":1327462215,"wof:concordances":{"gn:id":260139},"src:geom":"geonames","name:ell_x_variant":["Χαλκιάς"],"gn:geonameid":260139,"wof:tags":[],"counts:names_languages":2,"wof:supersedes":[],"wof:parent_id":85684643,"wof:placetype_names":["locality"],"mz:hierarchy_label":1,"gn:timezone":"Europe/Athens","edtf:cessation":"uuuu"}