Identification

Title

Kelp Canopy Extent 2006 - NW Calvert Island

Alternative title(s)

Kelp Canopy Extent 2006 - NW Calvert Island

Abstract

2006 air photos sourced from the province were used to digitize kelp canopies for NW Calvert Island. Focal areas of West Beach and Choked Passage off Calvert Island have been chosen to to multiple year analysis of kelp canopy change pre - and post otter establishment in the area. Kelp density / species / and extent are recorded - see attributes listed below. 2006 kelp canopy extent represents the maximum growth for the year. Tide level was roughly 2.47 meters (8.1 foot) - a level which could impact kelp extent and the ability for GIS technicians to properly detect and identify species. More research is being done to validate and test tide levels with associated kelp extent findings. All digitizing occurred using Arc GIS. SFU volunteer crew (Amanda Schrack and Sebastian Mather) along with principal investigators Jenn Burt and Keith Holmes. Methods based on KIM 1 methodology as described in Sutherland 2007 report: http://www.env.gov.bc.ca/omfd/reports/Kelp2007-HakaiPass.pdf Areas covered: West Beach – 7th beach to West Beach + Choked Passage – Surf Pass and North Beach to Wolf Beach North to Hakai Land and Sea Beach. Attributes: FID - Unique identification number - ARC auto generated during polygon creation Shape - Polygon - spatial representation Species - "Macro" / "Nereo" / Mixed detailing the two possible kelp canopy species. Macro refers to macrocystis pyrifera or giant kelp. Nereo refers to nereocystis luetkeana or bull kelp. Mixed is a homogenous mix of both Macro and Nereo species. Defined by GIS techs - identified by "credit" field. Density - density of kelp defined as either high or low. Based on the Sutherland methodology for kelp density. High = high density / based on mean kelp plants found per square meter. Low = low density - still a continuous bed of kelp with large gaps the length of each fond. Area sq_m - size of each kelp bed in square meters. Defined by arc geometry calculation. Concat - concatenation of species and density information. Used for cartographic purposes. Defined by concatenating species and density metrics in ARC GIS. Confidence - Used by GIS technician to identify difficult to detect species / kelp bed extent / density. Used to inform reviewers and quality control spatial information. High = High confidence - no need to check over, Medium = medium confidence - check over, Low = low confidence - unsure of major elements - reviewer check over. A "Checked" may be added to the information to determine quality control has been completed on low confidence polygons. Determined by the last "credit" reviewer. Credit - Initials of GIS technician to create and give the final quality check on the kelp extent polygon. KH = Keith Holmes, JB = Jenn Burt, AS = Amanda Schrack, SM = Sebastian Mather. Species_la - full Latin species name for the kelp. macrocystis pyrifera / nereocystis luetkeana / mixed. Mixed has a homogeneous mix of both macrocystis pyrifera and nereocystis luetkeana species Dataset created by Jenn Burt and Keith Holmes. Simon Fraser University Volunteers: Amanda Schrack and Sebastian Mather Contact: keith.holmes@hakai.org

Resource type

dataset

Resource locator

https://hecate.hakai.org/auth/access-request.php#

protocol: WWW:LINK-1.0-http--link

name: Hakai Data Access Online Request Form

description: Online form for requesting access to particular datasets owned by Hakai

http://hakai.maps.arcgis.com/home/item.html?id=cff1e8ea75bf4c838c80255272fda7ce

protocol: WWW:LINK-1.0-http--link

name: Hakai's ArcGIS Online Platform (restricted access)

description: Hakai's AGOL Instance is the platform for Access and online use of this dataset/'s reference layer

Unique resource identifier

code

codeSpace

Dataset language

eng

Spatial reference system

authority code

EPSG

code identifying the spatial reference system

3857

Classification of spatial data and services

Topic category

biota

oceans

Keywords

Keyword set

keyword value

Downloadable Data

originating controlled vocabulary

Keyword set

keyword value

kelp

Nereocystis luetkeana

Macrocystis pyrifera

2006

calvert

hakai

air

photo

canopy

marine

urchin

extent

Geographic location

West bounding longitude

-128.1719970703125

East bounding longitude

-128.10985565185547

North bounding latitude

51.68362528576685

South bounding latitude

51.63229666135982

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

creation

effective date

2015-11-27

date type

publication

effective date

2015-11-27

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

Shapefile

version of format

ESRI

Constraints related to access and use

Constraint set

Use constraints

Appropriate credit must be given to Hakai Institute and the authors of the dataset.

Responsible organisations

Responsible party

organisation name

Hakai Institute

full postal address

1002 Wharf Street - Suite 100

Victoria

V8W1T4

telephone number

+1 (250) 590 3306

email address

data@hakai.org

responsible party role

pointOfContact

Responsible party

organisation name

Hakai Institute

email address

responsible party role

processor

Metadata on metadata

Metadata point of contact

organisation name

Hakai Institute

email address

responsible party role

publisher

Metadata date

2018-10-17T22:56:00

Metadata language

eng