Development Advice Maps (DAM) (archived data)
Mapiau Cyngor ar Ddatblygu (DAM) (data wedi'i archifo)

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The Development Advice Map has now been superseded by the Flood Map for Planning (NRW_DS125074) and the data archived.


The Development Advice Map (DAM) shows areas at risk of flooding from rivers and the sea for the purposes of land-use planning. The DAM supports Planning Policy Wales and Technical Advice Note (TAN) 15 to guide new development away from areas at risk of flooding wherever possible. Together, they form a precautionary framework to guide planning decisions. The DAM should be considered as a trigger for identifying which development proposals may need to undertake a more detailed assessment of flooding risks and consequences in line with the policy advice set out in TAN15.


Zone C (the 1000yr extreme flood outline) was last updated in January 2020. No further updates are planned to the DAM and you are advised to contact Natural Resources Wales (NRW) about the availability of more up-to-date information.


Zone B (areas known to have flooded in the past) was originally published in 2004 and revised in 2017. When using the DAM the preview defaults to Zone B only. You will need to use the legend control to switch on the other zones.


NRW has developed a new Flood Map for Planning (FMfP) which was published in September 2021. This indicates undefended flood extents over the next 100yrs taking into account the impacts of climate change. This will replace the DAM in June 2023. Although the Flood Map for Planning is not referred to in current planning policy, it can be considered as the most up to date information on flooding risks.

Mae’r Mapiau Cyngor ar Ddatblygu (DAM) yn dangos ardaloedd mewn perygl o lifogydd at bwrpas cynllunio defnydd tir. Dylid defnyddio’r DAM law yn llaw â Pholisi Cynllunio Cymru a TAN 15 i wyro datblygiadau newydd i ffwrdd o ardaloedd mewn risg gymaint â phosib. Gyda’i gilydd, maent yn cynnig fframwaith rhagofalus i lywio penderfyniadau cynllunio. Nid yw’r mapiau a ddangosir yma wedi’u dylunio ar gyfer archwiliadau tu hwnt iI raddfa o 1:25,000 ac fe ddylid eu trin fel sbardun i ddilyn cyngor polisi yn TAN15.


Mae’r mapiau yn seiliedig ar amlinellau llifogydd eithafol Cyfoeth Naturiol Cymru (Parth C) a data Daeareg Arwynebol Arolwg Daearegol Prydain 10k (Parth B).


O fis Mawrth 2017 ymlaen bydd Parth C yn cael ei ddiweddaru’n chwarterol i alinio â diweddariadau amlinellau llifogydd eithafol CNC. Cafodd data Parth B ei gyhoeddi yn wreiddiol yn 2004, a’i adolygu yn 2017.


Nodwch y diffygion rhagolwg i Barth B yn unig. Defnyddiwch rheolaeth chwedl i newid ar barthau eraill. Data Diweddarwyd ddiwethaf Ebrill 2017.


Oherwydd problemau technegol nid yw Gwasanaethau’r We a’r Porwr Mapiau ar gyfer y Map Cyngor ar Ddatblygu ar gael ar hyn o bryd. Os dymunwch bori’r data gweler y Syllwr Perygl Llifogydd CNC yma.


Datganiad priodoli


Yn cynnwys gwybodaeth Cyfoeth Naturiol Cymru © Cyfoeth Naturiol Cymru a Hawl Cronfa Ddata. Cedwir pob hawl. Derived in part from 1:50,000 scale BGS Digital Data under Licence Number 2013/062. British Geological society. ©NERC

Identification

Dynodydd
Identifier
NRW_DS118733
Teitl Amgen
Alternative Title
  • DAM Zone C2
  • DAM Zone C1
  • DAM Zone B
  • DAM Zone A
Laith Metadata
Metadata Language
English
Lineage

Information warning: this dataset has been superseded by the Flood Map for Planning and is no longer available.


In 2004, Zone B coverage was limited to the number of available 50k tiles. In 2017, coverage has increased considerably and now covers approximately 90% of Wales.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2022-06-28
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Welsh Government -
Cathays Park, Cardiff, CF10 3NQ
wales.gov.uk
 

Extent

Extent

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


 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Geographic Information System ( Unknown )

    Specification

    ArcGIS feature class

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
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

Information warning: this dataset has been superseded by the Flood Map for Planning and is no longer available.


In 2004, Zone B coverage was limited to the number of available 50k tiles. In 2017, coverage has increased considerably and now covers approximately 90% of Wales.
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Allweddair
Keywords

NRW Thesaurus
  • flood prevention (flood protection) (flood management)
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-03-04
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

IPSV Subjects List
  • Risk management
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2020-11-18
Code
geonetwork.thesaurus.external.theme.subjects

Allweddair
Keywords

NRW SMNR Keywords
  • Ecosystem (SMNR)
  • Management Areas (SMNR)
  • Soil and Land (SMNR)
  • Sea and Coast (SMNR)
  • Coastal Margins (SMNR)
  • Sustainable Management of Natural Resources (SMNR)
  • Freshwater and Wetlands (SMNR)
  • Flooding (SMNR)
Math
Type
Theme
Theme

Dyfyniad
Citation

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

Spatial Reference System

Code
British National Grid (EPSG::27700)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

Access to this data is restricted due to licensing conditions. NRW may NOT publish or disseminate the data. Requests should be referred to NRW's Open Data Team.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW. © British Geological Society. © NERC (CEH). © Defra, Met Office and DARD Rivers Agency. © Cranfield University. © James Hutton Institute. © Ordnance Survey. © Land and Property Services. NRW does NOT grant permission to third parties to re-use or disseminate this dataset.
 

Attribution Statement

Other constraints

© CNC/NRW. All rights Reserved. Derived in part from 1:50,000 scale BGS Digital Data under Licence Number 2013/062. British Geological society. ©NERC. Attribution Statement for Zone C/A: © CNC/NRW and Centre for Ecology and Hydrology © NERC (CEH). Some features of this information are based on digital spatial data licensed from the Centre for Ecology and Hydrology © NERC (CEH). Defra, Met Office and DARD Rivers Agency © Crown copyright. © Cranfield University. © James Hutton Institute. Contains OS data © Crown copyright and database right 2015. Land and Property Services © Crown copyright and database rights.
 

Licence

Other constraints
Not Licenced for Re-use
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313138373333 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-04-13T12:46:23.303Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
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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