"access"=>"customers","seamark:harbour:category"=>"marina","seamark:name"=>"Haven Garnwerd aan Zee","seamark:type"=>"harbour"
"email"=>"camping@aduarderzijl.com","seamark:harbour:category"=>"marina","seamark:name"=>"Jachthaven Aduarderzijl","seamark:type"=>"harbour"
"email"=>"info@marenland.nl","power_supply"=>"yes","sanitary_dump_station"=>"yes","seamark:harbour:category"=>"marina","seamark:name"=>"Haven Marenland Winsum","seamark:type"=>"harbour"