"board_type"=>"nature","information"=>"board"
"map_size"=>"region","map_type"=>"topo","description"=>"Kaart met de deltawerken en informatie over de Volkeraksluizen","information"=>"map"
"layer"=>"2","map_size"=>"site","map_type"=>"scheme","description"=>"Beschrijving van de onderdelen van het sluizencomplex","information"=>"map"
"board_type"=>"history","information"=>"board"
"board_type"=>"technology","information"=>"board","operator"=>"Branbantse Delta"
"board_type"=>"art","information"=>"board","operator"=>"Branbantse Delta"