Herts Ecological Networks

Herts Ecological Networks
Alternative Title
Habitat Survey
Dataset Language
A project was carried out in 2011-2013 producing a new Hertfordshire habitat inventory with latest available data and then using these data to generate potential habitat network maps. Potential habitat network maps identify how our habitats are spatially related to each other and where the highest priorities are for expanding them and linking them together. This strategic approach ensures that efforts can be targeted to where they are of most potential benefit. It also ensures that the right combination of habitats are created in the right places, reflecting the historical context and physical factors and minimising unintended consequences of locking out the potential to restore functioning networks of one habitat for the sake of another.

The Hertfordshire Ecological Network mapping project was managed by a steering group that included representatives of the County Council and DEFRA bodies and the guidance document has been approved by the Hertfordshire Local Nature Partnership Planning Task Group that includes representatives from Herts Ecology, the County Council, District Councils and landowners.

For more detail on the project, please visit this page
Topic Category
Keyword Value: Natural Habitats
Originating Controlled Volcabulary: Integrated Public Sector Vocabulary (IPSV)
Originating Controlled Volcabulary Citation: Version 2.00 - 2006-05-23

Keyword Value: Habitats and biotopes
Originating Controlled Volcabulary: GEMET - INSPIRE Spatial Data Themes (GEMET)
Originating Controlled Volcabulary Citation: 2008-12-05
Temporal Extent
Dataset Reference Date
Date: 01/06/2023
Date Type: Revision
The 1997 habitat inventory was updated by re-evaluating the old data against more recent survey data, as available. Recent aerial photographs, dating between (2008 and 2010) were also used to check accuracy, discrepancies and visible changes in habitat distribution since 1997. A standardised Phase 1 habitat mapping approach by JNCC was used to classify habitats and produce the 2013 Hertfordshire habitat inventory.

The next stage involved developing computer models to understand how the county’s habitat networks fit together and where the priorities are for their restoration. Finally, specialist plant data were used to identify landscape-scale ecological units of particular strategic priority within the county.

Subsequent updates have been carried out by HERC.

IPR: Ordnance Survey
Product: 1:10,000 Vector Map Local
Date: 2023

IPR: Hertfordshire Environmental Records Centre (HERC)

IPR: Herts and Middlesex Wildlife Trust (HMWT)

IPR: Hertfordshire County Council (HCC)

IPR: Additional IPR may exist in this data, contact for clarification.
Bounding Coordinates
West Bounding Longitude: -0.76
East Bounding Longitude: 0.22
North Bounding Latitude: 52.10
South Bounding Latitude: 51.58
Extent: Hertfordshire
Authority Code: GB-HRT
Vertical Extent Information
Minumum Value:
Maximum Value:
Coordinate reference system:
Spatial Reference System
Spatial Reference System: National Grid of Great Britain
Authority Code: GB
Spatial Resolution
10 metre
Resource Locator
Access is controlled, contact for clarification.
Data Format
Name of Format: ESRI/Shape file, ESRI/SDE
Version of the Format: - NOT APPLICABLE -
Responsible Organisation
Hertfordshire Environmental Records Institute
Role: Distributor
Update Frequency
009 AsNeeded
Limitations on Public Access
Reserved for Hertfordshire Environmental Record Centre use. Access limited to authorised persons only.

Copyright Controlled. Use is subject to licence.

There are restrictions on some information regarding sensitive species (e.g. bats/badgers) - although many of these sites have now been deleted if found to be a record only.
Use Constraints
Licensed under the Public Sector Geospatial Agreement;
Hertfordshire County Council's Intellectual Property Rights

You must use the appropriate Copyright Acknowledgement;

For internal use:
©Crown copyright and database rights 2023 Ordnance Survey 100019606.

For external use:
© Crown copyright and database rights 2023 Ordnance Survey 100019606.
You are not permitted to copy, sub-licence, distribute or sell any of this data to third parties in any form.

For Publicly Available Electronic Copies the following must also be added:
The HCC Watermark;
The phrase: "Use of this data is subject to terms and conditions." set out in a legible font and conspicuous position must form a clear hyperlink to

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 source
Unique Resource Identifier
Habitat94to97_Lines, Habitat94to97_Polygons
Resource Type
Specification Name: COMMISSION REGULATION (EC) No 1205/2008 of 3 December 2008 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards metadata
Specification Date: 2008-12-04
Specification Date Type: Publication
Degree: False (Not Conformant)
Explanation: Not xml

Data Specifications for Annex 2 and 3 not confirmed
Metadata Date
Metadata Language
Metadata Point of Contact
Hertfordshire County Council - Corporate GIS Team
Review date
Name Long Name Description
OSGB36 National Grid Bounding Coordinates
West: 486000 East: 552000 North: 245000 South: 189000
More Information

Inventory of semi-natural habitats, maps and field site description sheets with sketch and flora recorded. Habitat mapped on 90 OS maps (scale 1:10,000). Habitat reports include county Wildlife Site descriptions.
Original paper maps probably underestimate neutral grassland required quality check.

Requires quality checking as digitisation has lumped semi-improved and unimproved within the same polygon, some open water sites digitised as unimproved grassland.


( Not currently in a viewer)
( Not currently in SDE)
Original dataset in HBRC file cabinets. Relevant sites copied to site files in cabinets.
Bound District Habitat Survey Reports on shelf in HBRC library.

Change History