Description: 2022 Broad Scale Mapping of the Waipati (Chaslands) Estuary was undertaken by Salt Ecology on behalf of Otago Regional Council and is described in: Forrest BM, Roberts KL, Stevens LM, Scott-Simmonds T. 2023. Synoptic Broad Scale Ecological Assessment of Waipati (Chaslands) River Estuary. Salt Ecology Report 113, prepared for Otago Regional Council, May 2023. 52p.
Ground-truthing was conducted during 1 December 2022.
Features were mapped onto 30cm/pixel colour aerial imagery captured between January and April 2019 and sourced from LINZ Data Service.
Generally, at a digitising scale of 1:2000, 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) is ~10 to 50 metres depending on the extent of ground truthing undertaken.
Features were digitised and field codes recorded by Salt Ecology in a master layer.
Salt Ecology 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.
Use with permission of Otago Regional Council and Salt Ecology.
Description: 2022 Broad Scale Mapping of the Waipati (Chaslands) Estuary was undertaken by Salt Ecology on behalf of Otago Regional Council and is described in: Forrest BM, Roberts KL, Stevens LM, Scott-Simmonds T. 2023. Synoptic Broad Scale Ecological Assessment of Waipati (Chaslands) River Estuary. Salt Ecology Report 113, prepared for Otago Regional Council, May 2023. 52p.
Ground-truthing was conducted during 1 December 2022.
Features were mapped onto 30cm/pixel colour aerial imagery captured between January and April 2019 and sourced from LINZ Data Service.
Generally, at a digitising scale of 1:2000, 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) is ~10 to 50 metres depending on the extent of ground truthing undertaken.
Features were digitised and field codes recorded by Salt Ecology in a master layer.
Salt Ecology proprietary scripting tools were used to validate field codes, check for topology errors, produce symbolised output layers and create summary data tables.
Macroalgal features were classified based on estimated percent cover, measured biomass (g/m2 wet weight) and presence of entrainment (i.e., stable macroalgal beds rooted ≥30mm deep within sediment). PatchIDs identify a macroalgae bed or group of beds that share common classification metrics.
Use with permission of Otago Regional Council and Salt Ecology.
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Description: 2022 Broad Scale Mapping of the Waipati (Chaslands) Estuary was undertaken by Salt Ecology on behalf of Otago Regional Council and is described in: Forrest BM, Roberts KL, Stevens LM, Scott-Simmonds T. 2023. Synoptic Broad Scale Ecological Assessment of Waipati (Chaslands) River Estuary. Salt Ecology Report 113, prepared for Otago Regional Council, May 2023. 52p.
Ground-truthing was conducted during 1 December 2022.
Features were mapped onto 30cm/pixel colour aerial imagery captured between January and April 2019 and sourced from LINZ Data Service.
Generally, at a digitising scale of 1:2000, 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) is ~10 to 50 metres depending on the extent of ground truthing undertaken.
Features were digitised and field codes recorded by Salt Ecology in a master layer.
Salt Ecology proprietary scripting tools were used to validate field codes, check for topology errors, produce symbolised output layers and create summary data tables.
200m terrestrial margin land use and dominant vegetation cover was recorded around the estuary boundary. Land cover was classified according to the New Zealand Land Cover Database version 5.0 (LCDB5) with one exception. A duneland land cover class has been added to highlight a habitat that is of particular interest as it relates to estuaries.
Use with permission of Otago Regional Council and Salt Ecology.
Description: 2022 Broad Scale Mapping of the Waipati (Chaslands) Estuary was undertaken by Salt Ecology on behalf of Otago Regional Council and is described in: Forrest BM, Roberts KL, Stevens LM, Scott-Simmonds T. 2023. Synoptic Broad Scale Ecological Assessment of Waipati (Chaslands) River Estuary. Salt Ecology Report 113, prepared for Otago Regional Council, May 2023. 52p.
Ground-truthing was conducted during 1 December 2022.
Features were mapped onto 30cm/pixel colour aerial imagery captured between January and April 2019 and sourced from LINZ Data Service.
Generally, at a digitising scale of 1:2000, 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) is ~10 to 50 metres depending on the extent of ground truthing undertaken.
Features were digitised and field codes recorded by Salt Ecology in a master layer.
Salt Ecology proprietary scripting tools were used to validate field codes, check for topology errors, produce symbolised output layers and create summary data tables.
Dominant estuarine salt marsh species were mapped. Salt marsh species codes combine the two first letters of the Latin species and genus names (e.g. Pldi = Plagianthus divaricatus (ribbonwood)). Vegetation was recorded in order of dominance; e.g Lesi Sare = (Lesi (rushland) dominant to Sare (herbfield)). Vegetation height is able to be derived from the structural class of features; e.g. Lesi (rushland) is taller than Sare (herbfield).
Use with permission of Otago Regional Council and Salt Ecology.
Description: 2022 Broad Scale Mapping of the Waipati (Chaslands) Estuary was undertaken by Salt Ecology on behalf of Otago Regional Council and is described in: Forrest BM, Roberts KL, Stevens LM, Scott-Simmonds T. 2023. Synoptic Broad Scale Ecological Assessment of Waipati (Chaslands) River Estuary. Salt Ecology Report 113, prepared for Otago Regional Council, May 2023. 52p.
Ground-truthing was conducted during 1 December 2022.
Features were mapped onto 30cm/pixel colour aerial imagery captured between January and April 2019 and sourced from LINZ Data Service.
Generally, at a digitising scale of 1:2000, 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) is ~10 to 50 metres depending on the extent of ground truthing undertaken.
Features were digitised and field codes recorded by Salt Ecology in a master layer.
Salt Ecology proprietary scripting tools were used to validate field codes, check for topology errors, produce symbolised output layers and create summary data tables.
Dominant intertidal surface substrate features were mapped, including areas beneath salt marsh vegetation. Sand and mud substrate classifications were validated through the laboratory analysis of representative samples from the surface 20mm for sediment grain size.
Use with permission of Otago Regional Council and Salt Ecology.
Description: 2022 Broad Scale Mapping of the Waipati (Chaslands) Estuary was undertaken by Salt Ecology on behalf of Otago Regional Council and is described in: Forrest BM, Roberts KL, Stevens LM, Scott-Simmonds T. 2023. Synoptic Broad Scale Ecological Assessment of Waipati (Chaslands) River Estuary. Salt Ecology Report 113, prepared for Otago Regional Council, May 2023. 52p.
Ground-truthing was conducted during 1 December 2022.
Features were mapped onto 30cm/pixel colour aerial imagery captured between January and April 2019 and sourced from LINZ Data Service.
Generally, at a digitising scale of 1:2000, 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) is ~10 to 50 metres depending on the extent of ground truthing undertaken.
Features were digitised and field codes recorded by Salt Ecology in a master layer.
Salt Ecology proprietary scripting tools were used to validate field codes, check for topology errors, produce symbolised output layers and create summary data tables.
The intertidal layer depicts the area of exposed between high and low tides and has been divided into areas with and without salt marsh vegetation. The portion of the intertidal area not covered by salt marsh is referred to as the available intertidal habitat (AIH) for seagrass and macroalgae.
Use with permission of Otago Regional Council and Salt Ecology.
Description: 2022 Broad Scale Mapping of the Waipati (Chaslands) Estuary was undertaken by Salt Ecology on behalf of Otago Regional Council and is described in: Forrest BM, Roberts KL, Stevens LM, Scott-Simmonds T. 2023. Synoptic Broad Scale Ecological Assessment of Waipati (Chaslands) River Estuary. Salt Ecology Report 113, prepared for Otago Regional Council, May 2023. 52p.
Ground-truthing was conducted during 1 December 2022.
Features were mapped onto 30cm/pixel colour aerial imagery captured between January and April 2019 and sourced from LINZ Data Service.
Generally, at a digitising scale of 1:2000, 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) is ~10 to 50 metres depending on the extent of ground truthing undertaken.
Features were digitised and field codes recorded by Salt Ecology in a master layer.
Salt Ecology proprietary scripting tools were used to validate field codes, check for topology errors, produce symbolised output layers and create summary data tables.
Subtidal areas were mapped as water. Generally, vegetation and substrate features are not mapped in the subtidal zone.
Use with permission of Otago Regional Council and Salt Ecology.