c5563ca5-60b9-475b-a4a4-c2d6209674ea English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2025-11-21T09:57:59 UK GEMINI 2.3 WGS 84 Video imagery and flow measurements from five surveys on the River Tweed, July 2024-June 2025 2025-09-17 publication https://catalogue.ceh.ac.uk/id/c5563ca5-60b9-475b-a4a4-c2d6209674ea 10.5285/c5563ca5-60b9-475b-a4a4-c2d6209674ea doi: Mandipe, S. (2025). Video imagery and flow measurements from five surveys on the River Tweed, July 2024-June 2025. NERC EDS Environmental Information Data Centre 10.5285/c5563ca5-60b9-475b-a4a4-c2d6209674ea This dataset contains river surface velocity data from video footage and from a kinematic current meter, during five surveys on the River Tweed in Scotland from July 2024 to June 2025. For the video footage, different Ground Control Point (GCP) positions and camera angles are adopted for a comparison of error from various image velocimetry techniques. The footage was captured using a nadir angle with a Unmanned Aerial System (UAS), as well as from an oblique view using an iPhone 14 Pro Max camera, with GCPs positioned at the free water surface and at an elevation above the free water surface. The footage frames were extracted and processed using three different image velocimetry softwares (Particle Tracking Velocimetry (PTV), Particle Image Velocimetry (PIV) and Space-Time Image Velocimetry (STIV)). Raw surface velocity outputs from the softwares are recorded herein. The data also includes the extracted frames from the geometrically corrected image velocimetry frames (orthophotos) from the three different viewing angles, and values for tracer density from a preliminary analysis is also included. Discharge data was collated during the final survey in June 2025 using the velocity-area method and salt dilution gauging. This data is recorded alongside an estimation of discharge from image velocimetry surface velocity data using the trapezoidal area of the river. The data was collated for the purpose of evaluating error propagation in image velocimetry applications under operational and sub-optimal environmental conditions. It was collected as part of a PhD project developed to assess the operational efficacy of image velocimetry applications in the UK. The data is complete and unfiltered. Full details about this dataset can be found at https://doi.org/10.5285/c5563ca5-60b9-475b-a4a4-c2d6209674ea Sharon Mandipe UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk pointOfContact Mandipe, S. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0002-8972-953X ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author UK Centre for Ecology and Hydrology / University of Reading (Scenario DTP PhD: NERC) EMAIL NOT PROVIDED owner NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian NERC EDS Environmental Information Data Centre info@eidc.ac.uk publisher Hydrography theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication hydrology river image processing GEMET - Concepts, version 4.1.3 2019-01-28 creation Hydrology unmanned aerial system (UAS) image velocimetry otherRestrictions no limitations otherRestrictions This resource is available under the terms of the Open Government Licence otherRestrictions If you reuse this data, you should cite: Mandipe, S. (2025). Video imagery and flow measurements from five surveys on the River Tweed, July 2024-June 2025. NERC EDS Environmental Information Data Centre https://doi.org/10.5285/c5563ca5-60b9-475b-a4a4-c2d6209674ea textTable English utf8 environment inlandWaters imageryBaseMapsEarthCover 2024-06-01 2025-07-31 -8.648 -0.728 54.634 60.861 Comma-separated values (CSV) jpg mp4 NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://catalogue.ceh.ac.uk/datastore/eidchub/c5563ca5-60b9-475b-a4a4-c2d6209674ea Download the data Download a copy of this data fileAccess https://data-package.ceh.ac.uk/sd/c5563ca5-60b9-475b-a4a4-c2d6209674ea.zip Supporting information Supporting information available to assist in re-use of this dataset information dataset dataset 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 River surface velocity data was derived from video footage processed using three different image velocimetry softwares. Surface velocity values from software are recorded, and video footage is included. River surface velocity data obtained using a current meter is recorded. River discharge data obtained using salt dilution gauging and velocity-area methods is recorded. Ground Control Point (GCP) distance and elevation is recorded. Frame-by-frame images of geometrically corrected footage from the River Tweed, which were post-processed from Image Velocimetry softwares is recorded.