2010 Updated GIS Dataset of Air Quality Management Areas
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2010 Updated GIS Dataset of Air Quality Management Areas Report to Defra and the Devolved Administrations Unrestricted AEAT/ENV/R/2997 Issue Number 1 April 2010 Unrestricted 2010 Updated GIS Dataset of AQMAs AEAT/ENV/R/2997/Issue 1 Title 2010 Updated GIS Dataset of Air Quality Management Areas Customer Department for Environment, Food and Rural Affairs Welsh Assembly Government The Scottish Executive Department of the Environment for Northern Ireland Customer reference CPEA 15 Confidentiality, This report is the Copyright of Defra and has been prepared by AEA copyright and Technology plc under contract to Defra dated 30/03/2004. The contents of reproduction this report may not be reproduced in whole or in part, nor passed to any organisation or person without the specific prior written permission of Defra. AEA Technology plc accepts no liability whatsoever to any third party for any loss or damage arising from any interpretation or use of the information contained in this report, or reliance on any views expressed therein. File reference AQMA_report_2010_draft Reference number AEAT/ENV/R/2997- Issue 1 AEA The Gemini Building Fermi Avenue Harwell International Business Centre Didcot OX11 0QR t: 0870 190 3858 f: 0870 190 6318 AEA is a business name of AEA Technology plc AEA is certificated to ISO9001and ISO14001 Authors Name Justin Lingard and Sally Cooke Approved by Name John Stedman Signature Date 29th April 2010 AEA iii 2010 Updated GIS Dataset of AQMAs Unrestricted AEAT/ENV/R/2997/Issue 1 iv AEA Unrestricted 2010 Updated GIS Dataset of AQMAs AEAT/ENV/R/2997/Issue 1 Executive Summary The present report describes the compilation of the 2010 GIS updated dataset of AQMA (Air Quality Management Area) boundaries in the UK. This new dataset includes information on changes to AQMA boundaries up to Decemeber 2009. This dataset is annually compiled and updated on behalf of Defra by AEA and has been updated as part of the Pollution Climate Mapping Contract (CPEA15). The information contained within the University of the West of England AQMA archive database was used to derive a list of local authorities in which the AQMAs had changed in any way since the preparation of the 2009 update (Yap 2009). In this list, 31 local authorities had declared new AQMAs or made revisions to existing AQMAs in 2009 and 2 local authorities had revoked some of their AQMAs. These local authorities were contacted via email and telephone to request from them a GIS dataset describing the location and boundary of their Air Quality Management Area(s). Different methods were then used to process the data received from local authorities. The Appendices to the report contain the image maps showing the locations of the AQMAs, a lookup table of AQMA IDs and local authority names, and all attribute information for each AQMA, including the method used for processing the information received from the local authority. In 2009, eight new Local Authorities were created by combining several smaller Local Authorities. These new authorities are Central Bedfordshire, Chester East, Cheshire West & Chester, Cornwall, Durham, Northumberland, Shropshire and Wiltshire. The AQMA dataset was updated this year to take into account these new Local Authority names and codes. AEA v 2010 Updated GIS Dataset of AQMAs Unrestricted AEAT/ENV/R/2997/Issue 1 vi AEA Unrestricted 2010 Updated GIS Dataset of AQMAs AEAT/ENV/R/2997/Issue 1 Table of contents Executive Summary v 1 Introduction 1 2 Methodology 2 2.1 ESRI Shapefiles 3 2.2 MapInfo TAB and MID/MIF files 3 2.3 Image Files and Other Documentation 3 3 Data Gaps and Future Updates 4 4 Dataset Copyright 5 5 AQMA Metadata and Maps 6 6 Conclusions and Recommendations 7 References Appendices Appendix 1 Maps Showing Locations of AQMAs Appendix 2 Attribute Information for Each AQMA AEA vii 1 Introduction This report describes the compilation of the 2010 updated dataset of AQMA (Air Quality Management Area) boundaries in the UK. This dataset is annually compiled and updated on behalf of Defra by AEA as part of the Pollution Climate Mapping Contract (CPEA15). This new dataset includes information on changes to AQMA boundaries up to Decemeber 2009. In 2009, eight new Local Authorities were created by combining several smaller Local Authorities. These new authorities are Central Bedfordshire, Chester East, Cheshire West & Chester, Cornwall, Durham, Northumberland, Shropshire and Wiltshire. The AQMA dataset was updated this year to take into account these new Local Authority names and codes. The previous dataset, 2009 GIS updated dataset, as described in the 2009 report (Yap 2009) was also compiled and updated on behalf of Defra by AEA as part of the Pollution Climate Mapping Contract (CPEA15). That dataset included the information on changes to AQMA boundaries up to December 2008. Before the 2008 GIS updated dataset, the previous datasets were compiled as part of the Neighbourhood Statistics on Ambient Air Quality Contract (RMP/2035). We expect that this dataset will be useful in a variety of Defra studies assessing compliance with EU legislation and public exposure to poor air quality. There is an ongoing need for the dataset to be maintained and updated to reflect changes in AQMA declarations each year. The datasets for 2005, 2006 and 2007 have been made available through the ONS Neighbourhood Statistics website (www.neighbourhood.statistics.gov.uk - select „view or download data by topic‟ and navigate to „physical environment‟ to find the AQMA dataset). The 2009 dataset is available from Defra‟s GIS unit ([email protected]). This report describes the method of compilation of the dataset. Maps showing the locations of the AQMAs and a list of all AQMAs are provided in the Appendices to this report. AEA 1 2 Methodology The information contained within the University of the West of England AQMA archive database was used to derive a list of local authorities in which the AQMAs had changed in any way since the preparation of the 2009 update (Yap 2009). In this list, 31 local authorities had declared new AQMAs or made revisions to existing AQMAs in 2009 and 2 local authorities had revoked some of their AQMAs. These local authorities were contacted via email and telephone to request from them a GIS dataset describing the location and boundary of their Air Quality Management Area(s). Table 2.1 below shows the list of local authorities with new AQMAs declared or changes made to existing AQMAs in 2009. Table 2.1 Local Authorities with changes to AQMAs in 2009 Changes to AQMAs in 2009 AQMA_ID LOCAL_AUTH AQMA_ID LOCAL_AUTH 66 BLABY DC 594 Northampton BC 67 BLABY DC 595 Northampton BC 68 BLABY DC 596 Northampton BC 120 London Borough of Brent 597 Northampton BC London Borough of Barking and 175 Dagenham 598 Northampton BC 177 South Oxfordshire DC 599 Worcester City Council 211 Liverpool City Council 600 Worcester City Council Royal Borough of Windsor & 276 Maidenhead 601 Worcester City Council Royal Borough of Windsor & Sefton Metropolitan Borough 277 Maidenhead 602 Council Sefton Metropolitan Borough 417 Renfrewshire 603 Council Sefton Metropolitan Borough 440 South Oxfordshire DC 604 Council 450 BLABY DC 605 Stratford on Avon District Council 451 BLABY DC 607 South Hams District Council 452 BLABY DC 608 South Hams District Council 467 Reading Borough Council 609 North West Leichestershire DC 524 Dudley MBC 610 North West Leichestershire DC 527 TORBAY BC 611 North Lanarkshire Rhondda Cynon Taff County 532 Borough 612 Wyre Borough Council Rhondda Cynon Taff County Royal Borough of Windsor & 533 Borough 613 Maidenhead Rhondda Cynon Taff County 534 Borough 614 North West Leichestershire DC Cheshire West and Chester 544 Northampton BC 615 Council 582 Forest Heath District Council 617 North Lincolnshire 583 South Oxfordshire DC 618 Bedford Borough Council Rhondda Cynon Taff County 584 Swale Borough Council 619 Borough Rhondda Cynon Taff County 586 Cheltenham Borough Council 620 Borough Rhondda Cynon Taff County 587 TEWKESBURY BC 621 Borough St Helens Metropolitan Borough Rhondda Cynon Taff County 589 Council 622 Borough 2 AEA St Helens Metropolitan Borough Rhondda Cynon Taff County 590 Council 623 Borough 591 Suffolk Coastal District Council 624 Lancaster City Council 592 Northampton BC 625 Coventry City Council 593 Northampton BC 626 Ryedale District Council Revoked AQMA_ID LOCAL_AUTH AQMA_ID LOCAL_AUTH 296 BEDFORD BC 320 Warwick DC 323 BEDFORD BC Data were received in a variety of formats: ESRI shapefiles, Adobe pdf files and images of varying formats. Data in each format required processing using a different method – described below. Table 2.2 shows how many AQMAs were processed using each method. 2.1 ESRI Shapefiles All shapefiles were firstly imported into ArcMap for processing. Some shapefiles were already in polygon format. These required no further processing. 2.2 MapInfo TAB and MID/MIF files MapInfo format files were initially converted into ESRI shapefiles using the Universal Translator tool in MapInfo. Following this the shapefiles were imported into ArcView and processed as described in the shapefile methodology. 2.3 Image Files and Other Documentation The boundaries of the AQMAs supplied as pdf files were digitised in ArcMap using the shapefiles that have been prepared internally for the purpose of Pollution Climate Mapping (PCM). The shapefiles were used as a backdrop for this digitising. These shapefiles consist of major roads, b roads and minor roads across the UK in the correct coordinates. Table 2.2 Number of AQMAs processed using each method AQMA Processing Number of AQMAs processed using File type received this method ESRI Shapefiles 58 Image files and other documentation 2 MapInfo TAB and MID/MIF 2 Total (All AQMAs) 62 The processed shapefiles for each AQMA were assigned unique IDs. These IDs are consistent with the IDs used in the database of AQMAs held on the Air Quality Archive (www.airquality.co.uk/archive/laqm/laqm.php).