river and stream
stabilized dune
after 1943
mixed
detached longitudinal defence
submerged wet land
urban area
urban green
farmland
arboreal vegetation
abandoned meander
wet land
levee
after 1900 - before 1943
arboreal
adherent longitudinal defence
mixed defence
dry beach
beach with infrastructure
flattened dune
shrub
cross-shore defence
before 1900
semi-stabilized dune
active dune
reworked soil
flood bed and riverbank
sandbar
fluvial bar
low tide terrace
mouth bar
washover fan
generic shoal
mouth shoal
tombolo
back barrier shoal
shoal in the lee of cross defence
mixed shoal