"seamark:harbour:category"=>"marina","seamark:name"=>"WSV De Hollandsche IJssel","seamark:type"=>"harbour"
"seamark:name"=>"Jachthaven Ridderkerk BV","seamark:type"=>"harbour","seamark:harbour:category"=>"marina"
"maxdraft"=>"2.5","operator"=>"WSV IJsselmonde","seamark:harbour:category"=>"marina","seamark:name"=>"WSV IJsselmonde","seamark:type"=>"harbour","vhf"=>"31"