OS Open Rivers is supplied as a national vector tileset in a single MBTiles file. This is a lightweight set of tiles that is efficient and fast to render in your software, provides high-resolution data and a seamless experience when zooming in and out. The data is supplied in Web Mercator projection (ESPG:3857).
The naming of attributes between vector tiles and GML is very similar as the vector tiles (set within the MBTiles file) do not limit in the number of characters for attribute names. The tables included here map the GML attribute name its vector tiles equivalent for the WatercourseLink and HydroNode features.
The use of an asterisk symbol (*) in the following tables indicates that a particular attribute is not mapped in that format, for example, fictitious has no vector tile equivalent.
The vector tiles schema, as well as the zoom level for each attribute, is detailed in the following table.
In the Zoom levels columns, N (no) indicates that the specified layer and attribute does not display within that zoom level, whereas the Y (yes) indicates that the specified layer and attribute does display within that zoom level.
| Attribute | 0 to 8 | 9 | 10 | 11 | 12 | 13 | 14 |
|---|---|---|---|---|---|---|---|
| Attribute | Zoom level: 0 to 8 | 9 | 10 | 11 | 12 | 13 | 14 |
|---|---|---|---|---|---|---|---|
| GML attribute | Vector tiles attribute |
|---|---|
| GML attribute | Vector tiles attribute |
|---|---|
id
N
Y
Y
Y
Y
Y
Y
flow_direction
N
Y
Y
Y
Y
Y
Y
length
N
Y
Y
Y
Y
Y
Y
form
N
Y
Y
Y
Y
Y
Y
watercourse_name
N
Y
Y
Y
Y
Y
Y
watercourse_name_lang
N
Y
Y
Y
Y
Y
Y
watercourse_name_alternative
N
Y
Y
Y
Y
Y
Y
watercourse_name_alternative_lang
N
Y
Y
Y
Y
Y
Y
id
N
Y
Y
Y
Y
Y
Y
hydronode_category
N
Y
Y
Y
Y
Y
Y
gml:identifier
id
hydroNodeCategory
hydro_node_category
geometry
*
gml:identifier
id
flowDirection
flow_direction
length
length
fictitious
*
form
form
watercourseName
watercourse_name
*
watercourse_name_lang
watercourseNameAlternative
watercourse_name_alternative
*
watercourse_name_alternative_lang
startNode
*
endNode
*
centrelineGeometry
*