Administrative boundaries may or may not have a predefined relationship with topographic features in their locality. This relationship is known as a 'boundary mereing' and is recorded within OS MasterMap as a textual description. A list of the most common abbreviations is given in the following table:
Object or mereing | Abbreviation |
---|---|
The following table contains examples of combined abbreviations:
Special rules apply to boundary mereings, and only the more common ones are listed.
Where the mereing relationship of any boundary alignment changes or where a boundary changes from one side of a real-world object to another, the point of change is shown by a boundary half-mereing change symbol, usually in opposing pairs. The location of the boundary half-mereing symbol is coincident with the boundary alignment and not the feature to which it is mered.
Object or mereing | Abbreviation |
---|---|
Baulk, bank, base of, basin, bridge, broad
B
Cam, canal, causeway, centre of, channel, cliff, conduit, cop, course of, covered, culvert, cut
C
Dam, ditch, dock, double, down, drain
D
Double ditch or drain
DD
Double fence
DF
Defaced
Def
Edge of, eyot
E
Face of, fence, fleet, freeboard
F
Feet
ft
Harbour, hedge
H
Inches
Ins
Kerb
K
Lade, lake, lead, loch, lockspit, lynchet
L
Marsh, mere, moat
M
Mean high water
MHW
Mean high water springs (Scotland only)
MHWS
Mean low water
MLW
Mean low water springs (Scotland only)
MLWS
Metres
M
Old
O
Passage, path, pond, post
P
Race, railway, ride, river, road, root of
R
Root of hedge
RH
Scar, sewer, side of, slope, sluice, stone, stream
S
Top of
T
Track
Tk
Undefined
Und
Wall, weir
W
Centre of bank, basin, baulk, broad and so on
CB
Centre of railway, river, road and so on
CR
Centre of old course of stream
COCS
1.22metres root of hedge
1.22 m RH