"board_type"=>"nature","information"=>"board","operator"=>"Utrechts Landschap"
"information"=>"board","url"=>"https://www.hollandsewaterlinie.nl"
"mtb"=>"yes","ref"=>"70412/001","horse"=>"yes","hiking"=>"yes","bicycle"=>"yes","operator"=>"Nationale Bewegwijzeringsdienst","guidepost"=>"paddenstoel","information"=>"guidepost"
"description"=>"Foto versperring met soldaten","information"=>"board"
"board_type"=>"history","information"=>"board","network"=>"Jan Blankenpad"
"hiking"=>"yes","information"=>"map","map_size"=>"region","map_type"=>"scheme","network"=>"lwn"
"hiking"=>"yes","information"=>"map","map_size"=>"region","map_type"=>"scheme","network"=>"lwn"