Identification

Title

SSSI NH3 Critical Levels

Alternative title(s)

SoDdGA NH3 Lefelau Critigol

Sites of Special Scientific Interest ammonia critical levels

Abstract

This layer provides a Critical Level (CLe) for ammonia against which impacts on a SSSI should be assessed. The value is the lowest CLe for a feature on that site. The layer gives the SSSI name, SSSI code and ammonia Critical Level. The ammonia CLe can be: 1: a 1µg/m3 NH3 Critical Level indicates a SSSI has N-sensitive bryophytes/lichens as a feature or has bryophytes/lichens as key components of a habitat feature of that SSSI; 3: a 3µg/m3 NH3 Critical Level indicates a SSSI has N-sensitive vegetation, or has invertebrate features that are dependent on N-sensitive vegetation; NS: all features on a site are considered not to be particularly sensitive to ammonia; this does not mean that other aspects of a development will not have negative impacts on a SSSI, for example throug h water pollution or disturbance.

Resource type

dataset

Resource locator

https://datamap.gov.wales/layers/geonode:nrw_sssi_nh3_cl

name: View and Download

https://datamap.gov.wales/capabilities/layer/3583/?access_token=i61nd1X0RwdwAgQrGW0sqAsWxBMiwx&ows_service=wms

name: Web Service

Unique resource identifier

code

124762

codeSpace

https://naturalresources.wales

Dataset language

eng

Spatial reference system

authority code

OGP

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::BNG

Classification of spatial data and services

Topic category

environment

Keywords

Keyword set

keyword value

Protected sites

originating controlled vocabulary

title

reference date

date type

publication

effective date

2023-03-07

Geographic location

West bounding longitude

-5.77774100

East bounding longitude

-2.60886500

North bounding latitude

53.51306700

South bounding latitude

51.24082900

Extent

Extent group

authority code

title

reference date

date type

publication

effective date

2023-03-07

code identifying the extent

Wales (WLS)

Temporal reference

Temporal extent

Begin position

2000-01-01

End position

2021-07-30

Dataset reference date

date type

publication

effective date

2022-08-03

Frequency of update

asNeeded

Quality and validity

Lineage

The dataset is based on the SSSI GIS Dataset (https://libcat.naturalresources.wales/folio/?oid=98776) with Critical Levels determined by the Terrestrial Ecosystems and Species Team.

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

© CNC/NRW All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number 100019741. Crown Copyright and Database Right Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose. Attribution Statement: Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number 100019741. Crown Copyright and Database Right.

Constraint set

Limitations on public access

There are no access restrictions on this data. NRW may release, publish or disseminate it freely.

Responsible organisations

Responsible party

organisation name

Natural Resources Wales (NRW)

telephone number

0300 065 3000

email address

enquiries@naturalresourceswales.gov.uk

responsible party role

owner

Responsible party

organisation name

Natural Resources Wales (NRW)

telephone number

0300 065 3000

email address

enquiries@naturalresourceswales.gov.uk

responsible party role

originator

Metadata on metadata

Metadata point of contact

organisation name

Natural Resources Wales (NRW)

telephone number

0300 065 3000

email address

enquiries@naturalresourceswales.gov.uk

responsible party role

pointOfContact

Metadata date

2023-03-06

Metadata language