Kelp Canopy Extent - 2015 - NW Calvert Island - British Columbia - Canada

Kelp Canopy Extent - 2015 - NW Calvert Island - British Columbia - Canada

Digitized kelp extent, species, and density for NW Calvert Island in the summer of 2015.

This methodology outlines the procedure for obtaining and processing high-resolution imagery of the canopy-forming kelp beds in the Northwest Calvert Island area. It also includes the procedure for data analysis and metrics of interest to be monitored over time.

Aerial Survey Area The survey for annual kelp bed mapping extends south from Starfish Island in Choked Pass to 7th Beach - NW Calvert Island, British Columbia, Canada.

Survey timing protocols are framed by the goal of obtaining imagery that best represents the maximum extent of the canopy-forming kelps. Based on optimizing the timing of maximum canopy development, tide level, and light conditions, we select acceptable “survey windows” at the beginning of each season. Firstly, survey windows occur during the period of maximum canopy extent, generally considered to be between August and October in British Columbia. Secondly, survey windows are determined by the timing of low tide cycles, such that all imagery is captured at tide heights lower than +1.0 m MLW.

Imagery Capture: Surveys are conducted using DJI Phantom 3 professional Unmanned Aerial Vehicles (UAVs or drones) equipped with a commercial grade 4k RGB camera to capture imagery. The UAV and camera are operated by using the DJI Capture software application connected to a tablet or smartphone.

Kelp extent layer is represented by polygons which were digitized manually in ARC GIS.

Attributes: Density, Area, Confidence, and Species.

Dataset created by Jenn Burt and Keith Holmes. Simon Fraser University Volunteers: Amanda Schrack and Andrea Chee Contact: data@hakai.org

Access and Use

Licence: Creative Commons Attribution 4.0
Limitations: Appropriate credit must be given to Hakai Institute and the authors of the dataset.

Data and Resources

Citation

Keywords

Dataset extent

Map data © OpenStreetMap contributors

Metadata Reference Date(s) March 11, 2022 (Publication)
March 11, 2022 (Revision)
Dataset Reference Date(s) April 30, 2015 (Publication)
Frequency of Update As Needed

Responsible Party 1
Name
Keith Holmes
Affiliation
Hakai Institute
Email
data@hakai.org
Role
  • Author
  • Custodian
  • Originator
  • Point of Contact
  • Principal Investigator
  • Processor
  • Publisher
  • Editor
Responsible Party 2
Name
Jenn Burt
Affiliation
Hakai Institute
Email
jenn.burt@gmail.com
Role
  • Author
  • Originator
  • Point of Contact
  • Principal Investigator
  • Processor
  • Publisher
  • Editor
Responsible Party 3
Affiliation
Hakai Institute
Email
data@hakai.org
Role
  • Distributor
  • Owner
  • Point of Contact
  • Resource Provider

Field Value
Ocean Variables
  • Macroalgal canopy cover and composition
  • Other
Scope Dataset
Status On Going
Topic Category oceans
Maintenance Note Generated from https://cioos-siooc.github.io/metadata-entry-form
Spatial Extent { "coordinates": [ [ [ -128.17543029785156, 51.63272286429384 ], [ -128.10916900634766, 51.63272286429384 ], [ -128.10916900634766, 51.68149662336026 ], [ -128.17543029785156, 51.68149662336026 ], [ -128.17543029785156, 51.63272286429384 ] ] ], "type": "Polygon" }
North Bounding Latitude 51.68149662336026
South Bounding Latitude 51.63272286429384
East Bounding Longitude -128.10916900634766
West Bounding Longitude -128.17543029785156
Vertical Extent
Min
0.0
Max
10.0
Default Locale English