Saltmarsh Habitat Map
A saltmarsh habitat map derived from airborne data. The habitat map is a polygon shapefile showing site relevant habitat classes – this is a merged product of multiple sites across multiple years. The habitat map is derived from CASI (Compact Airborne Spectrographic Imager) multispectral data, LIDAR (Light Detection and Ranging) elevation data, and other GIS products. The classification also uses ground data collected after the CASI capture. The ground data is used to identify the characteristics of the different habitats in the CASI and LIDAR data. These characteristics are then used to classify the different habitats and fit them into one of the predefined classes. The collection of ground data used in the classification has some limitations. It is not collected at the same time as the CASI or LIDAR; it is normally within a couple of months of CASI capture, therefore some variations between the CASI data and situation on site at the time of ground data collection are possible. A good spatial coverage of ground data around the site is recommended, although not always practically achievable. For a class to be mapped, there must have been samples collected for it on site. If the class is not seen on site or samples are not collected for a class, it cannot be mapped. The habitat map was created using a supervised classification, which means ground data were used to train the model. The classifications had a quantitative accuracy assessment carried out on them in the form of a confusion matrix using ground data set aside and not used in training the classifier. Alongside this aerial photography captured simultaneously with the CASI data was used to check and make final improvements to the habitat map. Attribution statement: © Environment Agency copyright and/or database right 2020. All rights reserved.
dataset
protocol: http
name: Saltmarsh_Habitat_Map_Using_CASI_and_LIDAR.lyr
description: Saltmarsh_Habitat_Map_Using_CASI_and_LIDAR.lyr download on Defra Data Services Platform
protocol: http
name: Saltmarsh_Habitat_Map_Using_CASI_and_LIDAR_Readme.pdf
description: Saltmarsh_Habitat_Map_Using_CASI_and_LIDAR_Readme.pdf download on Defra Data Services Platform
https://environment.data.gov.uk/explore/672ae95f-cec8-425d-8417-abd30a8d3684?download=true
protocol: http
name: Survey Data - Download
description: Download data by area of interest
protocol: http
name: Saltmarsh Habitat Map WMS
description: Saltmarsh Habitat Map WMS
protocol: http
name: Saltmarsh Habitat Map WFS
description: Saltmarsh Habitat Map WFS
https://environment.data.gov.uk/spatialdata/saltmarsh-habitat-map/ogc/features/v1
protocol: http
name: OGC API - Features service
description: OGC API - Features service
672ae95f-cec8-425d-8417-abd30a8d3684_resource
eng
http://www.opengis.net/def/crs/EPSG/0/27700
environment
habitats
saltmarsh
environment
vegetation
publication
2010-01-13
remote sensing
publication
2010-01-13
environmental monitoring
publication
2010-01-13
-6.236
2.072
55.816
49.943
2018-07-01
2020-09-01
creation
2018-07-01
revision
2023-12-15
irregular
The habitat map is derived from CASI (Compact Airborne Spectrographic Imager) multispectral data, LIDAR (Light Detection and Ranging) elevation data, and other GIS products. The classification also uses ground data collected after the CASI capture. The ground data is used to identify the characteristics of the different habitats in the CASI and LIDAR data. These characteristics are then used to classify the different habitats and fit them into one of the predefined classes. The habitat map was created using a supervised classification, which means ground data were used to train the model. The classifications had a quantitative accuracy assessment carried out on them in the form of a confusion matrix using ground data set aside and not used in training the classifier. Alongside this aerial photography captured simultaneously with the CASI data was used to check and make final improvements to the habitat map.
Open format | Shapefile (SHP)
Open Government Licence
There are no public access constraints to this data. Use of this data is subject to the licence identified.
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Environment Agency
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https://environment.data.gov.uk/support
description: Defra Data Services Forum
pointOfContact
Environment Agency
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pointOfContact
2024-05-31