Metadata

Historic Flood Map

Title

HistoricFlood

Alternative Title

HistoricFloodMap

Dataset Language

eng

Abstract

The Historic Flood Map is a GIS layer showing the maximum extent of individual Recorded Flood Outlines from river, the sea and groundwater springs that meet a set criteria. It shows areas of land that have previously been subject to flooding in England.
This excludes flooding from surface water, except in areas where it is impossible to determine whether the source is fluvial or surface water but the dominant source is fluvial. The majority of records began in 1946 when predecessor bodies to the Environment Agency started collecting detailed information about flooding incidents, although we hold limited details about flooding incidents prior to this date.
If an area is not covered by the Historic Flood Map it does not mean that the area has never flooded, only that we do not currently have records of flooding in this area that meet the criteria for inclusion. It is also possible that the pattern of flooding in this area has changed and that this area would now flood or not flood under different circumstances.
Outlines that don’t meet this criteria are stored in the Recorded Flood Outlines dataset. The Historic Flood Map takes into account the presence of defences, structures, and other infrastructure where they existed at the time of flooding.
It will include flood extents that may have been affected by overtopping, breaches or blockages.
Flooding is shown to the land and does not necessarily indicate that properties were flooded internally. Attribution statement: © Environment Agency copyright and/or database right 2018. All rights reserved

Topic Category

environment

Keyword

Keyword Value: Flood, Historic, Environment Agency, Open Data
Originating Controlled Vocabulary: GEMET - INSPIRE Spatial Data Themes (GEMET)
Originating Controlled Vocabulary Citation: 2008-01-01

Temporal Extent

from -1946-01-01 to -2021-05-05

Dataset Reference Date

Date:2004-01-01 -2021-05-05
Date Type: revision

Lineage

Flood outlines are digitised in ArcGIS from a number of sources including surveyed flood events
IPR:
Product:
Date:

Extent

Hertfordshire County +5km

Vertical Extent

-

Spatial Reference System

OSGB36 - National Grid of Great Britain

Spatial Resolution

1m

Resource Locator

DSP
protocol: DSP:ESRI name: HistoricFloodMap_Download description: Historic Flood Map Download
WMS
protocol: WMS name: HistoricFloodMap_WMS description: Historic Flood Map WMS
WFS
protocol: WFS name: HistoricFloodMap_WFS description: Historic Flood Map WFS
WMS
protocol: http:// name: DSP_CUSTOMER_FORUM description: Defra Data Services Platform Customer Forum
REST
protocol: WWW:LINK-1.0-http--link name: Historic_Flood_Map_ESRI_REST_Endpoint description: Historic Flood Map - ESRI REST Endpoint

Layerfile for use by HCC internal staff:J:\Geodata\EnvAgncy\Historic_Flood\Historic Flood Map.lyr

Format

ESRI/SDE

Responsible Organisation

Environment Agency
Email :DSPcustomerforum@environment-agency.gov.uk
Role: Resource Provider, Custodian, Owner, Distributor, Originator, Point of Contact, Processor, Publisher, Author.

Limitations on Public Access

no public access constraints to this data. Use of this data is subject to the licence identified. Open Government Licence

Use Constraints

Open Government Licence

This data is supplied without guarantee or any warranty as to the accuracy, currency or completeness, and is provided as is, excluding any warranties of any
kind, either express or implied, to the fullest extent permitted by law,including (but not limited to) satisfactory quality or fitness for a particular purpose.

Additional information

Resource Identifier

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.
2010-12-08
notEvaluated
Re-designing HCC Data for INSPIRE not done

Equivalent scale

Bounding box

0.76, 0.22, 51.58, 52.10

Quality scope

Dataset

Spatial representation type

vector

Character encoding

UTF-8

Data quality

-

Maintenance information

maintenance and update frequency: quarterly

update scope:

maintenance note: available from Link

Metadata update date

-2021-05

Metadata Language

English

Metadata Point of Contact

Environment Agency
Email :metadata@environment-agency.gov.uk

Resource Type

6 Dataset

File Identifier

Hierarchy level name

dataset

Parent identifier

-

Metadata standard name

UK GEMINI

Metadata standard version

2.3

Review date

-

Attributes

Name	Long Name	Description

OSGB36 National Grid Bounding Coordinates

West: 486000 East: 552000 North: 245000 South: 189000

More Information

Change History