GCN Strategic Opportunity Areas (Hertfordshire)

Name: GCN Strategic Opportunity Areas (Hertfordshire)
Creator: Defra group ArcGIS Online organisation
Published: 2024-03-02T00:27:58.000Z
License: Use of this data is subject to the terms of the Non-Commercial Government Licence: https://www.nationalarchives.gov.uk/doc/non-commercial-government-licence/version/2/

Authoritative

Natural England Open Data Publication

Defra group ArcGIS Online organisation

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Summary

Strategic Opportunity Areas for Great Crested Newts in Hertfordshire - areas where addition of new ponds would benefit GCN population.

This dataset identifies areas where the addition of new ponds would benefit Great Crested Newt populations.

The core areas contain a pond density of 2+ (i.e. there are 2+ ponds within 250m of any 25m square) where great crested newt presence has been predicted.

Fringe areas contain a pond density of <2 (i.e. there are fewer than 2 ponds within 250m of any 25m square) where great crested newt presence has been predicted or are within a 250m of a Core Area.

Higher scores are associated with darker colouration and represent a greater presence of suitable habitat features:

distance from rivers 50 - 1000m
arable density 50 - 100%
urban density 40 - 100%
grassland density 5 - 50%
distance from woodland < 100m
distance to nearest pond 0 - 150m

These suitable habitat features have been given a score of ‘1’.

distance from rivers 50 - 1000m
grassland density 5 - 50%
distance from woodland < 100m
distance to nearest pond 0 - 150m

These suitable habitat features have been given a score of ‘-1’.

arable density 50 - 100%
urban density 40 - 100%
Urban areas greater than 2ha (+400m buffer), roads (7.5m), rivers (7.5m) and Environment Agency Flood Zone 2 have been excluded.

Data used to generate this derived data set includes the 2015 CEH Land Cover map (woodland, grassland, arable and urban land classifications), OS MasterMap (pond locations that have been converted by NE into pond densities), Natural England GCN Class License Survey Returns England, Natural England GCN Pond Surveys DLL 17 18 19, OS Open Rivers, OS Open Roads, OS Boundary Line District Boundaries, Freshwater Habitats Trust PondNet GCN data and Allocations data from Hertfordshire County Council, St Albans City & District Council, Three Rivers District Council, Welwyn Hatfield Borough Council, Broxbourne Borough Council, Dacorum Borough Council, East Herts Council, Hertsmere Borough Council, Stevenage Borough Council, Watford Borough Council

DOI for LCM2015 25m raster data for Great Britain:

Rowland, C.S.; Morton, R.D.; Carrasco, L.; McShane, G.; O’Neil, A.W.; Wood, C.M. (2017) Land Cover Map 2015 (25m raster, GB). NERC Environmental Information Data Centre.

https://doi.org/10.5285/bb15e200-9349-403c-bda9-b430093807c7

DOI for LCM2015 Vector data for Great Britain:

Rowland, C.S.; Morton, R.D.; Carrasco, L.; McShane, G.; O’Neil, A.W.; Wood, C.M. (2017) Land Cover Map 2015 (vector, GB). NERC Environmental Information Data Centre.

https://doi.org/10.5285/6c6c9203-7333-4d96-88ab-78925e7a4e73

Full metadata can be viewed on environment.data.gov.uk and data.gov.uk.