Bathymetry for Six Lakes on Calvert and Hecate Islands - 2016 - British Columbia - Canada

Bathymetric surveys were completed for six lakes on Calvert and Hecate Islands as part of the Kwakshua Watersheds Program. The surveys were conducted at different times from May to July 2016 using a canoe-mounted, location-aware depth sounder and by taking random manual depth measurements.
All depth recordings are referenced to a survey benchmark and have been quality controlled, cleaned and processed in a 3D GIS environment. For each lake, bathymetry has been modeled by means of a 1m Natural Neighbours raster generated from a Triangulated Irregular Network (TIN) using survey data. The high water mark is used as reference for full lake volume calculations. The lake outline has been manually digitized from high resolution orthophotos. Bathymetry TIN models have been produced for each lake by using the manually digitized lake outlines as a “hard clip” interpolator of depth = 0, and using normalized (referenced on the vertical to a common benchmark) pre-processed and cleaned depth sounder and manual depth-reading survey data (depth) as mass points. The surveyed lakes are the following: Major lake within watershed 708 on Calvert Island. Major lake within watershed 1015 on Hecate Island. A system of four interconnected lakes within watershed 693 on Calvert Island. This dataset contains two layers of information: 1m depth contours for all lakes merged into the same layer to allow for symbolization and comparison of all lakes on the same vertical scale Surveyed lake outline polygons manually digitized from high resolution (25cm) orthophotos acquired in 2012. All data processing has been undertaken using ESRI’s ArcGIS 10.3 platform (ArcMap and ArcScene). Author Contributions: Santiago Gonzalez Arriola did all geospatial data processing and produced the final data and map products. Maartje Korver lead the the field data collection and initial data management. Wayne Jacob developed the depth sounder instrument and data logger. Ian Giesbrecht co-conceptualized the project with Suzanne Tank and Allison Oliver, and supervised implementation of field and geospatial aspects. Several members of the Hakai Geospatial Technologies team made important contributions, including Will McInnes, Matt Foster, Ray Brunsting and Keith Holmes. For stage-volume tables, volume equations and further details on the methodologies employed in the survey and processing of the data please contact data@hakai.org Suggested citation: Gonzalez Arriola, S., M. Korver, W. Jacob and I. Giesbrecht. 2016. Bathymetry for six lakes on Calvert and Hecate Islands, British Columbia. Hakai Institute Data Package. https://doi.org/10.21966/fcwf-p919

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

Dates

Metadata Reference Date(s) March 29, 2022 (Publication)
March 29, 2022 (Revision)
Dataset Reference Date(s) August 10, 2016 (Publication)
Frequency of Update As Needed

Citation

Dataset extent

Map data © OpenStreetMap contributors

Additional Info

Field Value
Ocean Variables Other
Scope Dataset
Status On Going
Topic Category oceans
Maintenance Note Generated from https://cioos-siooc.github.io/metadata-entry-form
Point of Contact
Point of Contact 1
Name
Santiago Gonzalez Arriola
Affiliation
Hakai Institute
Role
Point of Contact
Point of Contact 2
Name
Hakai Geospatial Technology Team
Affiliation
Hakai Institute
Email
data@hakai.org
Role
  • Custodian
  • Point of Contact
Responsible Party
Responsible Party 1
Name
Santiago Gonzalez Arriola
Affiliation
Hakai Institute
Role
  • Author
  • Processor
Responsible Party 2
Name
Maartje Korver
Role
Author
Responsible Party 3
Name
Wayne Jacob
Affiliation
Hakai Institute
Email
wayne.jacob@hakai.org
Role
Author
Responsible Party 4
Name
Ian Giesbrecht
Affiliation
Hakai Institute
Email
ian.giesbrecht@hakai.org
Role
  • Author
  • Owner
Responsible Party 5
Name
Hakai Geospatial Technology Team
Affiliation
Hakai Institute
Email
data@hakai.org
Role
Processor
Responsible Party 6
Affiliation
Hakai Institute
Email
data@hakai.org
Role
Publisher
Distributor
Distributor 1
Name
Ian Giesbrecht
Affiliation
Hakai Institute
Email
ian.giesbrecht@hakai.org
Role
Distributor
Spatial Extent {"type": "Polygon", "coordinates": [[[-128.09646606445312, 51.5996802644666], [-127.9508972167969, 51.5996802644666], [-127.9508972167969, 51.69171329024539], [-128.09646606445312, 51.69171329024539], [-128.09646606445312, 51.5996802644666]]]}
North Bounding Latitude 51.69171329024539
South Bounding Latitude 51.5996802644666
East Bounding Longitude -127.9508972167969
West Bounding Longitude -128.09646606445312
Vertical Extent
Min
0.0
Max
0.0
Default Locale English
Citation identifier
Code
10.21966/fcwf-p919