'collects' isn't used on ordance survey maps but 'coll' is used for 'college'.
Alley
There are many places where one can find an ordnance survey map. One looking to find an ordnance survey map should visit the official Ordnance Survey website and click the 'Get a Map' link.
"Ch" on an Ordnance Survey map typically stands for "church." It marks the location of a church or a place of worship on the map.
It refers to a Pump or Pump house
FC relates to 'Forestry Commission' therefore a green shape with the letters 'FC' on an ordnance survey map means 'Forest or woodland'.
Ordnance Survey
A point where water issues from the ground, eg. a spring.
what is the importance of a ordnance survey map to uniformed public services?
Ordnance Survey maps.
On an Ordnance Survey map, "sinks" typically refers to depressions or cavities in the landscape that may collect water or cause land to subside. These features can vary in size and are important to note for understanding the terrain and potential hazards in the area.
lines
Town Hall