Cite this dataset as
Broughton, R.K., Gerard, F., Haslam, R., Howard, A.S. (2017). Woody habitat corridor data in South West England. NERC Environmental Information Data Centre. (Dataset). https://doi.org/10.5285/4b5680d9-fdbc-40c0-96a1-4c022185303f
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This dataset is made available under the terms of the Open Government Licence 
Woody habitat corridor data in South West England
This dataset contains polylines depicting non-woodland linear tree and shrub features in Cornwall and much of Devon, derived from lidar data collected by the Tellus South West project. Data from a lidar (light detection and ranging) survey of South West England was used with existing open source GIS datasets to map non-woodland linear features consisting of woody vegetation. The output dataset is the product of several steps of filtering and masking the lidar data using GIS landscape feature datasets available from the Tellus South West project (digital terrain model (DTM) and digital surface model (DSM)), the Ordnance Survey (OS VectorMap District and OpenMap Local, to remove buildings) and the Forestry Commission (Forestry Commission National Forest Inventory Great Britain 2015, to remove woodland parcels). The dataset was tiled as 20 x 20 km shapefiles, coded by the bottom-left 10 km hectad name. Ground-truthing suggests an accuracy of 73.2% for hedgerow height classes.
Publication date: 2017-03-21
View record as
Format
Shapefile
Spatial information
- Study area
-
- Spatial representation type
- Vector
- Spatial reference system
- OSGB 1936 / British National Grid
Temporal information
- Temporal extent
-
2013-07-01 to 2013-08-31
Provenance & quality
The output data product has been ground truthed, suggesting an accuracy of 73.2% between field survey and modeled heghts of hedgerows (see documentation). The dataset has not been exhaustively checked for all errors. Extensive manual checking (comparison to aerial imagery) removed obvious anomalies, but many are likely to be remaining. Particular issues with misclassification of features at the coast resulted in all features within a 50 m buffer of the high water mark being removed. Some areas of tall in-field crops are probably also present as apparent low scrub, and difficulty in rendering very irregular patches of trees and scrub have created very dense or very simplistic areas of polylines.
Related
Citations
Broughton, R.K., Chetcuti, J., Burgess, M.D., Gerard, F.F., & Pywell, R.F. (2021). A regional-scale study of associations between farmland birds and linear woody networks of hedgerows and trees. In Agriculture, Ecosystems & Environment (Vol. 310, p. 107300). Elsevier BV. https://doi.org/10.1016/j.agee.2021.107300
Correspondence/contact details
Dr. Richard Broughton
UK Centre for Ecology & Hydrology
Maclean Building, Benson Lane, Crowmarsh Gifford
Wallingford
Oxfordshire
OX10 8BB
UNITED KINGDOM
enquiries@ceh.ac.uk
Wallingford
Oxfordshire
OX10 8BB
UNITED KINGDOM
Authors
https://orcid.org/0000-0002-6838-9628
Haslam, R.
British Geological Survey
Howard, A.S.
British Geological Survey
Other contacts
- Rights holder
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UK Centre for Ecology & Hydrology
- Custodian
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NERC EDS Environmental Information Data Centreinfo@eidc.ac.uk
- Publisher
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NERC Environmental Information Data Centreinfo@eidc.ac.uk