"information"=>"terminal","operator"=>"Staatsbosbeheer","source:date"=>"2014-03-24"
"board_type"=>"nature","description"=>"wandelroutes","information"=>"board"
"information"=>"office","source:date"=>"2014-03-24"
"board_type"=>"history","information"=>"board"
"board_type"=>"geology","description"=>"Salamanderweide (Uitzicht op de Betuwe)","information"=>"board"
"hiking"=>"yes","information"=>"map","map_size"=>"site","map_type"=>"scheme","operator"=>"Natuurmonumenten"