Classification value defining the type of WatercourseLink.
| Code | Description |
|---|---|
Where the WatercourseForm has not been determined, this attribute is set to 'null' and the value of nilReason is set to ‘unknown’.
A correct value will exist, but the methods employed by Ordnance Survey to date have not facilitated capture.
Canal
A manmade watercourse originally created for inland navigation.
Drain
A manmade watercourse whose primary purpose is the removal of excess water from a localised area.
This attribute is not fully populated in this release of the data; however, it will be added to in future data updates.
Foreshore
A watercourse that flows without a well-defined channel over the foreshore (the area between the high and low water marks).
inlandRiver
A river or stream that is not influenced by normal tidal action.
Lake
A large area of non-tidal water without an obvious flow that is enclosed by land.
lockOrFlightOfLocks
An enclosure in a canal or navigable river with a movable gate and sluices at either end. Designed to allow vessels to move between sections of canal or navigable river at different levels by filling or draining the enclosure.
This attribute is not fully populated in this release of the data; however, it will be added to in future data updates. Where watercourses flow through Locks, they are included but may be attributed with a more general term.
Marsh
An area of ground that is predominantly waterlogged by freshwater throughout the year with no identifiable specific alignment for the flow. For the water network, they are captured only where water flows into and out of the marsh and connects to other watercourses.
Reservoir
An area of non-tidal water used for storing water that may be used for irrigation, water supply, power generation or flood control. The area has been created artificially either fully or in part.
This attribute is not fully populated in this release of the data; however, it will be added to in future data updates. Where watercourses flow through Reservoirs they are included but may be attributed with a more general term.
Sea
Tidal water where the influence of inland watercourses is negligible, for example, a wide estuary or the open sea. They are usually included to provide connections for watercourses running into estuaries.
tidalRiver
Watercourses that are subject to the effect of normal tidal action. These exist between the Normal Tidal Limit and Point B (an intangible line where the level of a river meets the level of the sea).
Transfer
A manmade watercourse whose primary purpose is to move water from one location to another (using gravity and / or pumping) typically for water supply or power generation.