Name: Saltmarsh Habitat Map
Display Field: Site
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: This saltmarsh habitat map is 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.
Copyright Text: Environment Agency
Default Visibility: true
MaxRecordCount: 2000
Supported Query Formats: JSON, geoJSON, PBF
Min Scale: 25000
Max Scale: 0
Supports Advanced Queries: true
Supports Statistics: true
Has Labels: false
Can Modify Layer: true
Can Scale Symbols: false
Use Standardized Queries: true
Supports Datum Transformation: true
Extent:
XMin: 323143.0697999997
YMin: 95314
XMax: 522200.4966000002
YMax: 427288
Spatial Reference: 27700
(27700)
Drawing Info:
Renderer:
Unique Value Renderer:
Field 1: class
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
Default Label: N/A
UniqueValueInfos:
-
Value: Pioneer
Label: Pioneer
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [255, 0, 0, 255]
Outline:
-
Value: Spartina
Label: Spartina
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [255, 255, 0, 255]
Outline:
-
Value: Mid-Low Marsh
Label: Mid-Low Marsh
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [85, 255, 0, 255]
Outline:
-
Value: Upper Marsh
Label: Upper Marsh
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [0, 197, 255, 255]
Outline:
-
Value: Reedbeds
Label: Reedbeds
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [197, 0, 255, 255]
Outline:
-
Value: Transitional Grasses
Label: Transitional Grasses
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [137, 137, 68, 255]
Outline:
-
Value: Floodplain and Coastal Grazing Marsh
Label: Floodplain and Coastal Grazing Marsh
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [0, 255, 197, 255]
Outline:
Transparency: 0
Labeling Info:
Advanced Query Capabilities:
Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
HasZ: false
HasM: false
Has Attachments: false
HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText
Type ID Field: null
Fields:
-
site
(
type: esriFieldTypeString, alias: Site, length: 50
)
-
casi_date
(
type: esriFieldTypeString, alias: CASI Survey Date, length: 12
)
-
lidar_date
(
type: esriFieldTypeString, alias: LIDAR Survey Date, length: 12
)
-
analysisyr
(
type: esriFieldTypeString, alias: Analysis Year, length: 7
)
-
class
(
type: esriFieldTypeString, alias: Saltmarsh Class, length: 50
)
-
version
(
type: esriFieldTypeInteger, alias: Version
)
-
objectid
(
type: esriFieldTypeOID, alias: FID
)
-
shape
(
type: esriFieldTypeGeometry, alias: Shape
)
-
st_area(shape)
(
type: esriFieldTypeDouble, alias: st_area(shape)
)
-
st_perimeter(shape)
(
type: esriFieldTypeDouble, alias: st_perimeter(shape)
)
Supported Operations:
Query
Query Attachments
Query Analytic
Generate Renderer
Return Updates
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