Sites of Special Scientific Interest Units (England)
Summary
Site Units are divisions of SSSIs. based on habitat, tenure and management, and are the basis for recording all information on SSSI Condition and management. They range in Area from 0.004ha up to 18,000ha and only overlap where SSSIs overlap. Boundaries are generally mapped against Ordnance Survey MasterMap.
Categories
Keywords
Use limitation statement
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Licence
Open Government LicenceAttribution statement
Attribution statement: © Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right [year].
Technical information
Update frequency
asNeeded
Lineage
All data is captured to the Ordnance Survey National Grid sometimes called the British National Grid. OS MasterMap Topographic Layer produced and supplied by Ordnance Survey from data at 1:1250, 1:2500 and 1:10000 surveying and mapping standards - is used as the primary source. Other sources acquired internally and from external suppliers - may include aerial imagery at resolutions ranging from 25cm to 2m, Ordnance Survey 1:10000 raster images, historical OS mapping, charts and chart data from UK Hydrographic Office and other sources, scanned images of paper designation mapping (mostly originally produced at 1:10560 or 1:10000 scales), GPS and other surveyed data, and absolute coordinates. The data was first captured against an August 2002 cut of OS MasterMap Topography. Natural England has successfully uploaded an up-to-date version of OS MasterMap Topographic Layer. However, we have not yet updated our designated data holding to this new version of MasterMap. This should occur in the near future, when we will simultaneously apply positional accuracy improvement (PAI) to our data.
Spatial information
Coordinate reference system
http://www.opengis.net/def/crs/EPSG/0/27700Geographic extent
- Latitude from: 49.8625 to 55.7447
- Longitude from: -6.41736 to 2.05827
Metadata information
Language
English
Metadata identifier
1126e504-19c1-4e57-a54d-e2cdb3b762a5
Published by
Natural England
Contact publisher
data.services@naturalengland.org.ukDataset reference dates
Creation date
N/A
Revision date
25 July 2024
Publication date
01 May 2016
Period
- From: 01 January 1970
- To: 31 December 2099
Search
Data and Supporting Information
Data services and download by area of interest | Link | Action |
---|---|---|
Download data by area of interest | N/A | Open link |
ArcGIS Open Dataset record page | Open link | |
Sites of Special Scientific Interest Units (England) ESRI REST Feature Server Endpoint | Open link | |
Sites of Special Scientific Interest Units (England) WMS | Copy link | Preview |
Sites of Special Scientific Interest Units (England) WFS | Copy link | N/A |
OGC API - Features service | Copy link | Open link |
Full downloads and supporting documentation | Format | Action |
---|---|---|
Data_Gov_UK_Metadata_Sites_of_Special_Scientific_Interest_Units_England.url | URL | Download |
Open_Government_Licence.url | URL | Download |
Sites_of_Special_Scientific_Interest_Units.lyr | LYR | Download |