"email"=>"johanpruis@live.nl","seamark:harbour:category"=>"marina","seamark:name"=>"Stichting Recreatiehaven Onderdendam","seamark:type"=>"harbour"
"seamark:harbour:category"=>"marina","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"