# TidalBoundary In England and Wales, these tide lines will be the levels of mean tides, i.e. of a tide between a spring and neap tide. In Scotland, the tide lines are those of mean spring tides. In places where there is no Foreshore (e.g. vertical cliffs), the TidalBoundary is classified as the 'High Water Mark'.

UML class diagram for the TidalBoundary, TidalWater, SurfaceWater_Area, Foreshore and SurfaceWater_Line Feature Types, and the TidalBoundaryClassification Code List.

## TidalBoundary attributes ### classification The classification of the TidalBoundary. The valid values are defined in the TidalBoundaryClassification Code List. * **Type:** TidalBoundaryClassification * **Length:** 45 * **Multiplicity:** \[1] ### featureCode A unique feature code to facilitate styling. * **Type:** Integer * **Multiplicity:** \[1] ### geometry Line representing the alignment of the tidal boundary. * **Type:** GM\_Curve * **Multiplicity:** \[1] --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.os.uk/os-downloads/products/maps-and-imagery-portfolio/os-openmap-local/os-openmap-local-technical-specification/feature-types/tidalboundary.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.