78390 is a postalcode and its consensus geometry is derived from frgov.
{"mz:is_ceased":0,"geom:latitude":48.804418,"wof:name":"78390","counts:names_total":0,"wof:placetype":"postalcode","frgov:DEP":"78","frgov:ID":"78390","frgov:_COL6":5276.8,"mz:is_approximate":1,"wof:hierarchy":[{"continent_id":102191581,"country_id":85633147,"county_id":102070705,"localadmin_id":404376413,"locality_id":101749091,"macrocounty_id":404228265,"macroregion_id":404227465,"postalcode_id":421307787,"region_id":85683367}],"mz:is_deprecated":0,"frgov:SURF":5.545055,"geom:area":6.81E-4,"geom:longitude":2.019113,"wof:id":421307787,"frgov:LIB":"Bois-d'Arcy","counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1480939055,"wof:belongsto":[85683367,102191581,85633147,404376413,404228265,404227465,101749091,102070705],"wof:concordances":{"gp:id":"12727506"},"wof:repo":"whosonfirst-data-postalcode-fr","src:geom":"frgov","wof:country":"FR","counts:names_preferred":0,"frgov:POP2010":13693,"gp:parent_id":"12639178","geom:area_square_m":5545483.504498,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"FR","counts:names_languages":0,"geom:bbox":"1.99438662845,48.796687229,2.05012501955,48.8139360371","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"4343996d5d8b8e30f34364087441a417","wof:parent_id":101749091,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}