GENERAL INFORMATION Title of dataset: Sheep GPS and pasture locations (Nofence). Authors involved with sample collection, processing and/or analysis: Edward A. Codling. Contact Author: Edward A. Codling. ORCID ID: 0000-0001-5124-3334 Institution: University of Essex Address: Wivenhoe Park, Colchester, Essex CO4 3SQ, UK Email: ecodling@essex.ac.uk Date of data collection: 15/04/2024 to 9/11/2024. Geographic location of data collection: Mynydd Myddfai, Bannau Brycheiniog (Brecon Beacons) National Park; study farm: Esgairlllaethdy, Lat: 51.951849, Long: -3.767607. Funding: This research did not receive any external funding. Nofence collars were purchased through an internal equipment allocation. METHODOLOGICAL INFORMATION Global Positioning System (GPS) data: Nofence virtual fencing collars were deployed on approximately 100 upland sheep; each collar contains a GPS sensor recording location. Locations were set to record every 15 minutes when the animals were active and the update rate was reduced when the animals were not active e.g., during the night, to save battery. The farmer defined a polygonal boundary, stored as a sequence of GPS locations, that acts as a virtual fence for the animals. DATA-FILES: Nofence_readme.txt Readme file provided by Nofence that explains the data formatting and arrangement in each GPS datafile. pastures_10839.csv GPS locations of pasture (polygonal virtual fence) defined as a set of GPS locations for each farmer-defined time period. positions_20240327_104507.csv GPS locations of each Nofence collar from 15th April to 27th April 2024. positions_20240427_104507.csv GPS locations of each Nofence collar from 27th April to 27th May 2024. positions_20240527_104507.csv GPS locations of each Nofence collar from 27th May to 27th June 2024. positions_20240627_104507.csv GPS locations of each Nofence collar from 27th June to 27th July 2024. positions_20240727_104507.csv GPS locations of each Nofence collar from 27th July to 27th August 2024. positions_20240827_104507.csv GPS locations of each Nofence collar from 27th August to 27th September 2024. positions_20240927_104507.csv GPS locations of each Nofence collar from 27th September to 27th October 2024. positions_20241027_104507.csv GPS locations of each Nofence collar from 27th October to 11th November 2024.