Description: 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.
Copyright Text: Salt Ecology, Otago Regional Council
Description: 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.
Terrestrial margin land use as well as vegetation was recorded for areas within 200 metres of the estuary boundary. Land cover classes are the same as those used in 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.
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.
Description: 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.
Salt marsh species codes are recorded in order of their 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).
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.
Description: 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.
Dominant surface substrate features were mapped for the intertidal extent 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.
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.
Description: 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.
Salt marsh species codes are recorded in order of their 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).
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.
Description: 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 intertidal layer depicts those areas of land that are exposed between the high and low tides.
The intertidal area has been split based on the presence of salt marsh vegetation. The portion of the intertidal area that is not covered by salt marsh is referred to as the available intertidal habitat (AIH) area.
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.
Description: 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 Master layer depicts the broad scale habitat areas within and directly adjacent to the estuary.
The Master layer has been digitised directly from broad scale field maps and is the one source of truth from which output map layers and summary statistics are generated. The master layer includes all mapped terrestrial margin, intertidal and subtidal features with the exception of macroalgae features.
Field codes are listed in descending order of dominance. Percent cover values corrolate with seagrass species codes and are listed in the same order.
Terrestrial margin land use as well as vegetation was recorded for areas within 200 metres of the estuary boundary. Land cover classes are the same as those used in 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.
The estuary polygon layer depicts the full extent of the estuary and includes both the intertidal and subtidal areas.
The intertidal layer depicts those areas of land that are exposed between the high and low tides.
The intertidal area has been split based on the presence of salt marsh vegetation. The portion of the intertidal area that is not covered by salt marsh is referred to as the available intertidal habitat (AIH) area.
Subtidal areas have been mapped as water. Generally vegetation and substrate features in are not mapped in the subtidal zone.
Dominant surface substrate features were mapped for the intertidal extent 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.
Salt marsh species codes are recorded in order of their 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).
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.