Identification
Title
Boundary High Water Mark
Alternative title(s)
BoundaryHighWaterMark
Abstract
In the OS NGD Boundaries Collection, the mean high water (springs) mark is shown to the normal tidal limit (NTL). Areas of salt marsh, mudflats and so on often have extremely complicated tide lines. For ease of digitising and to reduce data volumes, mean high water may be generalised in these areas (not Scotland). The mean high water (springs) mark is represented in the OS NGD Boundaries Collection by a polyline feature. The mean high water (springs) mark is subject to continuous change, but the captured alignment of a tide line is a snapshot on one day. It is not practical to revise tide lines frequently.
Resource type
dataset
Resource locator
https://osdatahub.os.uk/
name:
OS DataHub
description:
Sign up for API and Select+Build
function:
download
https://os.uk/business-government/sectors/public-sector
name:
Product description
description:
PSGA product description
function:
information
Unique resource identifier
code
asu-bdy-boundaryhighwatermark
codeSpace
Dataset language
eng
Spatial reference system
code identifying the spatial reference system
Classification of spatial data and services
Topic category
boundaries
Keywords
Keyword set
keyword value
originating controlled vocabulary
title
GEMET - INSPIRE themes, version 1.0reference date
date type
publication
effective date
2008-06-01
Keyword set
keyword value
originating controlled vocabulary
title
INSPIRE feature concept dictionaryreference date
date type
publication
effective date
2013-03-25
Keyword set
keyword value
originating controlled vocabulary
title
reference date
date type
publication
effective date
2022-08-31
Geographic location
West bounding longitude
-8.66
East bounding longitude
1.79
North bounding latitude
60.85
South bounding latitude
49.90
Extent
Extent group
authority code
code identifying the extent
Great Britain
Temporal reference
Temporal extent
Begin position
1900
End position
Dataset reference date
date type
publication
effective date
2022-09-29
Frequency of update
daily
Quality and validity
Lineage
Drawn directly from the National Geographic Database, which is collated from a variety of sources
Conformity
Conformity report
specification
title
reference date
date type
publication
effective date
2010-12-08
degree
true
explanation
Data format
name of format
version of format
Constraints related to access and use
Constraint set
Limitations on public access
NGD data is available via OS Partners and to PSGA members
Constraint set
Limitations on public access
Responsible organisations
Responsible party
contact position
Customer Services
organisation name
Ordnance Survey
full postal address
Adanac Drive
Southampton
SO160AS
United Kingdom
telephone number
03456050505
email address
customerservices@os.uk
responsible party role
publisher
Metadata on metadata
Metadata point of contact
contact position
Product Management
organisation name
Ordnance Survey
full postal address
Adanac Drive
Southampton
SO160AS
United Kingdom
telephone number
03456050505
email address
customerservices@os.uk
responsible party role
pointOfContact
Metadata date
2023-03-10T14:31:39
Metadata language
eng