Imagery and elevation models monitoring algae research sites - 2017 - Calvert Island - British Columbia - Canada

Orthomosaics of long-term intertidal monitoring sites on NW Calvert Island were created using unoccupied aerial systems (UAS). Subsequently, a digital elevation model and elevation point cloud were generated for each site.

Imagery was captured for each site with a DJI Phantom 3 Pro UAS. The survey design followed a grid pattern to ensure coverage of the entire study area with a minimum 80% overlap between images. To geolocate the images, 6-10 ground control points were surveyed with a Topcon GR-5 real-time kinematic (RTK) GPS.

Near infrared imagery(NIR) was also captured at the North Beach site with a MAPIR Survey 2 camera. The MAPIR is a low-resolution modified camera that captures imagery in the NIR and Red bands. The camera is mounted to the Phantom 3 and operated manually. The MAPIR images are processed to create an imagery mosaic with Pix4D. The imagery is then radiometrically calibrated using the empirical line method with grey and white targets. A spectroradiometer has NOT been used to assess the accuracy of the imagery calibration.

The difference vegetation index (DVI) is calculated to remove the effects of illumination, and to emphasize vegetation signatures. The DVI is calculated as NIR-R.

For a specific list of sites, see the attached documentation.

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) January 21, 2022 (Publication)
January 21, 2022 (Revision)
Dataset Reference Date(s) December 19, 2017 (Publication)
Frequency of Update As Needed

Responsible Party 1
Name
Hakai Geospatial Technology Team
Affiliation
Hakai Institute
Email
data@hakai.org
Role
  • Author
  • Custodian
  • Distributor
  • Owner
  • Point of Contact
  • Processor
Responsible Party 2
Name
Will McInnes
Affiliation
Hakai Institute
Role
  • Point of Contact
  • Processor
Responsible Party 3
Affiliation
Hakai Institute
Email
data@hakai.org
Role
  • Distributor
  • Resource Provider
Responsible Party 4
Affiliation
Hakai Research Institute
Email
data@hakai.org
Role
Distributor

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
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North Bounding Latitude 51.68021937787972
South Bounding Latitude 51.64358968607138
East Bounding Longitude -128.089599609375
West Bounding Longitude -128.15757751464844
Vertical Extent
Min
0.0
Max
5.0
Default Locale English