Name: Trophic Level Index Grades

Display Field: Lake

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: Lakes where the Trophic Level Index (TLI) is monitored and reported on as part of the State of the Environment monitoring process by Environment Canterbury. The Trophic Level Index (TLI) provides information on water quality in lakes. The TLI is determined by measuring: - total nitrogen - total phosphorus - visual clarity - algal biomass. Lakes are classified: Trophic Level 0-1 = Ultra-microtrophic Trophic Level 1-2 = Microtrophic Trophic Level 2-3 = Oligotrophic Trophic Level 3-4 = Mesotrophic Trophic Level 4-5 = Eutrophic Trophic Level 5-6 = Supertrophic Trophic Level 6-7 = Hypertrophic The main trophic states determined by these indicators are: - Oligotrophic lakes are clear and blue, with very low levels of nutrients and algae. - Mesotrophic lakes have moderate levels of nutrients and algae. - Eutrophic lakes are green and murky, with higher amounts of nutrients and algae. - Supertrophic lakes are fertile and saturated in phosphorus and nitrogen, often associated with poor water clarity. Excessive phytoplankton growth can occur in ideal conditions - when there's a calm, hot and sunny period of a few weeks. - Hypertrophic lakes are highly fertile and supersaturated in phosphorus and nitrogen. They have excessive phytoplankton growth which contributes to poor water clarity, poor suitability for recreational uses, and restricts the habitat for desirable fish.

Copyright Text:

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 3000000

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: 1348529.5017999997
YMin: 5048432.5746
XMax: 1648014
YMax: 5304801
Spatial Reference: 2193  (2193)

Drawing Info:

Renderer:
Class Breaks Renderer:
Field: CurrentTLI
Min. Value: 1.0
ClassBreakInfos:
• Class Maximum Value: 2
  Label: Microtrophic
  Description: N/A
  Symbol:
  
• Class Maximum Value: 3
  Label: Oligotrophic
  Description: N/A
  Symbol:
  
• Class Maximum Value: 4
  Label: Mesotrophic
  Description: N/A
  Symbol:
  
• Class Maximum Value: 5
  Label: Eutrophic
  Description: N/A
  Symbol:
  
• Class Maximum Value: 6
  Label: Supertrophic
  Description: N/A
  Symbol:
  
• Class Maximum Value: 9
  Label: Hypertrophic
  Description: N/A
  Symbol:
  
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
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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:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Lake ( type: esriFieldTypeString, alias: Lake, length: 100 )
• SiteID ( type: esriFieldTypeString, alias: SiteID, length: 10 )
• Category ( type: esriFieldTypeString, alias: Category, length: 100 )
• Maximum_depth ( type: esriFieldTypeDouble, alias: Maximum_depth )
• TLIObjective ( type: esriFieldTypeDouble, alias: TLIObjective )
• CurrentTLI ( type: esriFieldTypeDouble, alias: CurrentTLI )
• Year ( type: esriFieldTypeInteger, alias: Year )
• ThumbnailTLI ( type: esriFieldTypeString, alias: ThumbnailTLI, length: 200 )
• ThumbnailTimeSeries ( type: esriFieldTypeString, alias: ThumbnailTimeSeries, length: 200 )
• NZTMX ( type: esriFieldTypeInteger, alias: NZTMX )
• NZTMY ( type: esriFieldTypeInteger, alias: NZTMY )
• WGS84_LATITUDE ( type: esriFieldTypeDouble, alias: WGS84_LATITUDE )
• WGS84_LONGITUDE ( type: esriFieldTypeDouble, alias: WGS84_LONGITUDE )
• CreatedBy ( type: esriFieldTypeString, alias: CreatedBy, length: 50 )
• CreatedDate ( type: esriFieldTypeDate, alias: CreatedDate, length: 8 )
• ModifiedBy ( type: esriFieldTypeString, alias: ModifiedBy, length: 50 )
• ModifiedDate ( type: esriFieldTypeDate, alias: ModifiedDate, length: 8 )
• PublishDate ( type: esriFieldTypeDate, alias: PublishDate, length: 8 )
• ProcessDate ( type: esriFieldTypeDate, alias: ProcessDate, length: 8 )
• ProcessId ( type: esriFieldTypeString, alias: ProcessId, length: 50 )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• GlobalID ( type: esriFieldTypeGlobalID, alias: GlobalID, length: 38 )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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