WINS Urban Green Infrastructure: Demand for Urban Greenspace - Air Pollution

This dataset was created for the Welsh Information for Nature-based Solutions (WINS) project (previously known as SCCAN) to identify opportunities for land management interventions that enhance ecosystem service delivery across a range of key policy areas. An accompanying User Guide is available to support the use of these datasets, and a full list of source datasets and data limitations can be found in the project technical report.


This dataset identifies areas with a demand for greenspace based on levels of air pollution, measured using annual average PM2.5 concentrations. Demand is mapped along a colour gradient from dark green to dark brown, with increasing demand determined by a combination of three factors: the severity of air pollution, population density, and levels of deprivation.

Identification

Identifier
NRW_DS121712
Alternative Title
  • SCCAN Urban Green Infrastructure: Demand for Urban Greenspace - Air Pollution
Metadata Language
English
Lineage

The dataset was created using annual average PM2.5 monitoring data across Wales. Areas with PM2.5 concentrations greater than 8 µg/m³ were classified as having the poorest air quality and, therefore, the highest demand for greenspace interventions. Areas with PM2.5 concentrations between 6 µg/m³ and 8 µg/m³ were classified as having a moderate level of demand, while areas with lower concentrations were not considered demand areas.


This demand layer was combined with population density and Welsh Index of Multiple Deprivation (WIMD) data to derive an overall demand score for air quality improvement measures. For the WIMD, the two most deprived categories (ranks 1 to 382) were assigned the highest priority, while ranks 383 to 573 were assigned a moderate priority. Areas with lower levels of deprivation were not assigned additional priority based on deprivation.


Population density, derived from the most recent census data, was classified into five groups using Jenks natural breaks. The two most densely populated classes were assigned the highest priority, the middle class was assigned a moderate priority, and the remaining classes were not assigned additional priority based on population density.


This dataset was produced for NRW by Environment Systems Ltd.
Additional Information

Data gaps and limitations: Air quality data accessible for this project reported on annual averages only. However, guidelines on air quality also consider the number of times per year that a critical, health-relevant cut-off value is exceeded. The addition of exceedance values could extend the demand space.
Dataset Reference Date (Publication)
2018-04-01

Temporal Extent

Begin date
2017-09-01
End date
2018-04-01
 
Topic category
  • Planning cadastre
  • Society
  • Farming
  • Biota
  • Geoscientific information
  • Climatology, meteorology, atmosphere
  • Environment
  • Elevation
  • Imagery base maps earth cover
  • Inland waters
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Environment Systems Ltd -
8G Vefn Llan Science Park, Aberystwyth, Ceredigion, SY23 3AH, Wales
http://www.envsys.co.uk/
 

Extent

Extent

Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Format Type and Description
  • Geographic Information System ( )

    Specification

    ESRI Feature Class

 

Quality

Data quality

Quality Scope
Dataset
Conformity
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

The dataset was created using annual average PM2.5 monitoring data across Wales. Areas with PM2.5 concentrations greater than 8 µg/m³ were classified as having the poorest air quality and, therefore, the highest demand for greenspace interventions. Areas with PM2.5 concentrations between 6 µg/m³ and 8 µg/m³ were classified as having a moderate level of demand, while areas with lower concentrations were not considered demand areas.


This demand layer was combined with population density and Welsh Index of Multiple Deprivation (WIMD) data to derive an overall demand score for air quality improvement measures. For the WIMD, the two most deprived categories (ranks 1 to 382) were assigned the highest priority, while ranks 383 to 573 were assigned a moderate priority. Areas with lower levels of deprivation were not assigned additional priority based on deprivation.


Population density, derived from the most recent census data, was classified into five groups using Jenks natural breaks. The two most densely populated classes were assigned the highest priority, the middle class was assigned a moderate priority, and the remaining classes were not assigned additional priority based on population density.


This dataset was produced for NRW by Environment Systems Ltd.
 

Keywords

Keywords

GEMET - INSPIRE themes, version 1.0
Type
Theme

Citation

Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus
  • Area Statement
  • SoNaRR
Type
Theme

Citation

Date (Publication)
2026-08-27
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

NRW SMNR Keywords
  • Sustainable Management of Natural Resources (SMNR)
  • Ecosystem Services (SMNR)
Type
Theme

Citation

Date (Publication)
2024-06-26
Code
geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords
 

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Content Information

NRW Profile

Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Restriction type
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

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

Use Constraints

Use constraints type
Other restrictions
Other constraints

© CNC/NRW All rights Reserved. © Office for National Statistics (ONS). © DEFRA. 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

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains Office for National Statistics information © Office for National Statistics (ONS) Crown copyright and database right. Contains DEFRA information © Crown copyright. All rights reserved.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313231373132 XML
Metadata Language
English
Parent Identifier
WINS Area Statement Opportunity Maps

NRW_DS121668
Resource type
Dataset
Metadata Date
2026-09-30T13:58:02.732Z
Metadata Standard Name
NRW
Metadata Standard Version

1.0

pointOfContact
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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