VAN_1755_0026_01/Metro_Vancouver_SEI_2014___Ecosystems_Class_Comp

View In: ArcGIS JavaScript ArcGIS Online Map Viewer ArcGIS Earth ArcMap ArcGIS Pro

View Footprint In: ArcGIS Online Map Viewer

Service 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.

Map Name: Dashboard Test

Legend

All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers:

Ecosystems Class, Comp 1 (1)

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: 4bb1de3773ef42fe9d2257de07b8ed60

Copyright Text: MV - Josephine Clark

Spatial Reference: 26910 (26910)

Single Fused Map Cache: false

Initial Extent:

Full Extent:

Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Supports Dynamic Layers: true

MaxRecordCount: 2000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON, PBF

Supports Query Data Elements: true

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources: Info Dynamic Layer

Supported Operations: Export Map Identify QueryDomains QueryLegends Find Return Updates

VAN_1755_0026_01/Metro_Vancouver_SEI_2014___Ecosystems_Class_Comp_1 (MapServer)