Culvert: OS MM Water Layer (Lines)
Dataset Created
11/06/2021
License
UK Open Government Licence (OGL)
Contacts
Improvement Service
Last Updated
22/02/2024
Data Provided by
Improvement Service
alternative_name
clvt
la_collection
ckan
lineage
This dataset was amalgamated, optimised and published by the Spatial hub.
The following quality assurance checks and corrections are carried out on the data:
- Polygons are not dissolved/ aggregated by key name and local authority.
- The minimum polygon area allows in the data is 1 square metres
- Checks for invalid geometry types
- The maximum angle for any spikes is 3 degrees
- Any duplicate geometry is removed from the data
- Duplicate key names for polygons are not removed
- Polygons with no key names are not removed
- Checks for basic geometry and self-intersection
Please contact spatialhub@improvementservice.org.uk for more details.
organisation_managed
false
update_frequency
annually
Formats:
WFS
| Format | Last Updated | |
|---|---|---|
| CSV | 23/01/2024 | |
| WFS | 23/01/2024 | |
| WMTS | 23/01/2024 | |
| Shapefile | 23/01/2024 |
| Attribute Info | Description | Specification |
|---|---|---|
| la_name | The LA that supplied the data | Should use the exact name as it appears in the local authority sct register |
| objectid | Unique ID | Alphanumeric |
| toid | External object identifier of the spatial object | Identifier |
| startnode | The HydroNode coincident with the first vertex for this WatercourseLink. | Unknown |
| endnode | The HydroNode coincident with the last vertex for this WatercourseLink. On very rare occasions the end HydroNode may be the same instance as the start HydroNode. | Unknown |
| primacy | Value indicating the relative importance of the WatercourseLink within any larger watercourse it is part of | Integer |
| flow_direction | Direction of water flow in the segment relative to digitisation of segment geometry | Unknown |
| watercourse_length | Calculated two dimensional length of network segment in metres | Length |
| length_uom | Unknown | Unknown |
| watercourse_width | The average width of the watercourse along the WatercourseLink expressed in metres. | Distance |
| width_uom | Unknown | Unknown |
| watercourse_level | A description of the relationship of the watercourse to ground level. | Unknown |
| watercourse_gradient | A calculated percentage value that indicates the rate of descent of the surface of the water. See Gradient for derivation. | Real |
| catchment_name | The name of the catchment area where the WatercourseLink falls, assigned by a responsible body | Character String |
| catchment_id | The code of the catchment area where the WatercourseLink falls, assigned by a responsible body. | Character String |
| watercourse_name | The name of the watercourse that the WatercourseLink is part of. | Character String |
| watercourse_name_alt | The name of the watercourse that the WatercourseLink is part of. | Character String |
| local_name | A name that applies to part of a watercourse that is a sub section of a larger named watercourse that the WatercourseLink is part of. | Character String |
| local_name_alt | An alternative name that applies to part of a watercourse that is a sub section of a larger named watercourse that the WatercourseLink is part of. | Character String |
| watercourse_form | The nature of the watercourse being represented by the feature. | Unknown |
| level_of_detail | A calculated value indicating the relative cartographic importance of a WatercourseLink to aid selection and depiction when styling the data. | Unknown |
| provenance | The origin of the centreline Geometry property. | Unknown |
| permanence | A logical indicator that describes if the watercourse contains water year round (in normal conditions) or only contains water intermittently | Boolean |
| managed_navigation | A logical indicator that describes whether the watercourse is managed for inland navigation by a member of The Association of Inland Navigation Authorities (AINA). | Boolean |
| version_id | The identifier of the particular version of the spatial object, with a maximum length of 25 characters | Character String |
| fictitious | Indicator that the centreline geometry of the link is a straight line with no intermediate control points | Boolean |
| oneway | Unknown | Unknown |
| shape_length | Calculated two dimensional length of network segment in metres | Length |
| _predicate | Unknown | Unknown |