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Layer: Ecosystems Class, Comp 1 (ID: 1)

View In:   ArcGIS Online Map Viewer

Name: Ecosystems Class, Comp 1

Display Field: SourceName

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: A Sensitive Ecosystem Inventory (SEI) was conducted for the Metro Vancouver region and Abbotsford from 2010-2012, using 2009 imagery. An update to that inventory was conducted for the Metro Vancouver region only from 2015-2018, using 2014 imagery. Provincial SEI standards were followed to identify and map ecologically significant and relatively unmodified 'Sensitive Ecosystems', including wetlands, older forests and woodlands. In addition, 'Modified Ecosystems' such as old fields and young forests, which are human modified but still have ecological value and importance to biodiversity were included in the mapping process. The project area totaled 330,600 ha, consisting of terrestrial lands plus rivers, freshwater bodies, intertidal and estuarine zones. Two main approaches were used to build the inventory of polygons based on the availability of Terrestrial Ecosystem Mapping (TEM) products. TEM was used to generate SEI values in the Coquitlam, Capilano, and Seymour watersheds; the Regional Parks network; and Mount Seymour and Indian Arm Provincial Parks. Riparian fringe and gully SEI classes could often not be directly translated from TEM so had to be newly generated. For remaining areas with no existing TEM, SEI mapping was developed through image interpretation followed by selective field checks to confirm and inform mapping decisions. For new mapping, 20% of polygons were checked in the field. Polygons were delineated at 1:5,000 (new mapping) to 1: 10,000 - 1: 20,000 (originating from TEM). Sites as small as 0.5 ha were mapped, with the exception of some “Modified Ecosystems”, where only larger instances were mapped, e.g., greater than 2.5 ha for old fields, and greater than 5ha for young forest. Some sites originating from TEM were smaller than 0.5 ha and these were also included in the inventory. Key attributes of class and subclass, structural stage, stand composition, condition and size were recorded for each component within a polygon. Although a polygon can have up to three ecosystem components, attempts were made to map as many pure sites as possible (i.e. one component). Other attributes of biogeoclimatic unit, landscape context, disturbance factors and ecosystem 'quality' were recorded for the polygon as a whole. In the 2014 update, inventory polygons were assessed with the primary purpose of detecting removals or disturbances during the previous 5 years. Corrections were also made where needed.Users of the SEI must take into account certain limitations inherent with this type of dataset and consider how those limitations may impact the intended use of the information. This includes differences between the dataset and actual site conditions that could be due to human error, classification difficulties, and changes to the site occurring after the date of the imagery or field work. The dataset is considered accurate at the scale it was delineated at and should not be enlarged beyond this. The SEI does not replace the need for on-site assessments to support any decisions made for a particular area.Visit www.metrovancouver.organd search ‘SEI’ to access the SEI Technical Report.

Service Item Id: 65e43f57c41343c7b714fc67b77e41b3

Copyright Text: MV - Josephine Clark

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Supports Datum Transformation: true

Extent:
Drawing Info: Advanced Query Capabilities:
HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: Comp1Lgnd

Fields: Types:
Capabilities: Query,Create,Update,Delete,Uploads,Editing

Sync Can Return Changes: false

Is Data Versioned: false

Supports Rollback On Failure: true

Supports ApplyEdits With Global Ids: false

Supports Query With Historic Moment: false

Supports Coordinates Quantization: true

Supported Operations:   Query   Query Attachments   Apply Edits   Add Features   Update Features   Delete Features   Calculate   Validate SQL   Generate Renderer   Return Updates   Iteminfo   Thumbnail   Metadata