2022 Broad Scale Mapping of the Hoopers Estuary was undertaken by Salt Ecology on behalf of Otago Regional Council and is described in: Hoopers Inlet: 2022/2023 Broad-scale Habitat Mapping of Salt marsh and the Terrestrial Margin. Salt Ecology Short Report 030, prepared by Keryn Roberts for Otago Regional Council, June 2023. p5. Ground-truthing was conducted during 26-27 November 2022. Features were mapped onto 30cm/pixel colour aerial photos captured on 13 April 2022 and supplied by Opollo Mapping for Otago Regional Council. Spatial accuracy for features clearly visible on aerial photos (e.g. salt marsh, cobble fields, dense macroalgae) is ~2 metres. Spatial accuracy for features difficult to distinguish on aerial photos (e.g. where boundaries represent a habitat transition from mud to sand, sparse macroalgal beds) is ~10 to 20 metres depending on the extent of ground truth undertaken. Features were digitised and field codes recorded in a master layer. Proprietary scripting tools were used to validate field codes, check for topology errors, produce symbolised output layers and create summary data tables. The estuary polygon layer depicts the full extent of the estuary and includes both the intertidal and subtidal areas. Due to partial closure of the estuary entrance, intertidal flats did not fully drain during the field survey period. The entrance remained partially closed during site visits in December 2022 and February 2023. Consequently, intertidal features outside of salt marsh were not able to be mapped. Use with permission of Otago Regional Council and Salt Ecology.