BCMCA_ECO_Kelp_GiantKelp_Polygons_DATA

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

The British Columbia Marine Conservation Analysis (BCMCA), a Tides Canada Initiatives Project

Publication_Date: 12/2008

Title: BCMCA_ECO_Kelp_GiantKelp_Polygons_DATA

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage:

\\vancouverserver\gis\BCMCA\Repository\DATA_Shapefiles\BCMCA_ECO_Kelp_GiantKelp_Polygons_DATA.shp

Description:

Abstract:

The British Columbia Marine Conservation Analysis (BCMCA) is a collaborative project assembling and analyzing spatial information about Canada's Pacific Ocean. The overall goal of the BCMCA is to identify marine areas of high conservation value and marine areas important to human use. Results of the project are intended to inform and help advance marine planning initiatives in BC by providing collaborative, peer-reviewed scientific analyses based on the best ecological and socio-economic spatial data at scales relevant to a BC coast-wide analysis.

Purpose:

The purpose of this dataset is to identify areal extents of Giant Kelp presence that informs the marine feature identified at the BCMCA Marine Plants Workshop.

Supplemental_Information:

This dataset is a compilation of data collected by many people, for different purposes, using different survey techniques with different methodologies within each technique and, therefore, considerable care must be taken when using the data, even for site-specific inquiries. Refer to the original metadata document pasted within source information for data limitations and usage. Data was collected, merged, and dissolved by species using the following data sources: 1. Provincial (LUCO) kelp polygons based on aerial overflights and CHS chart data. 2. LOS Kelp data (May 2004) 3. Parks Canada Pacific Rim raster data (main_pp)

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: unknown

Currentness_Reference: ground condition

Status:

Progress: In work

Maintenance_and_Update_Frequency: Unknown

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -133.284244

East_Bounding_Coordinate: -123.379400

North_Bounding_Coordinate: 54.735051

South_Bounding_Coordinate: 48.188173

Keywords:

Theme:

Theme_Keyword_Thesaurus:

REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords.

Theme_Keyword: Giant Kelp (Macrocystis integrifolia)

Place:

Place_Keyword: British Columbia

Access_Constraints:

This dataset is subject to the terms and conditions of the data use agreements for the source datasets.

Use_Constraints:

This dataset is subject to the terms and conditions of the data use agreements for the source datasets.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: British Columbia Marine Conservation Analysis

Contact_Person: Karin Bodtker

Contact_Position: BCMCA, Co-Chair

Contact_Address:

Address_Type: mailing and physical address

Address: 1405-207 West Hastings Street

City: Vancouver

State_or_Province: BC

Postal_Code: V6B 1H7

Country: Canada

Contact_Voice_Telephone: 604-696-5044

Contact_Electronic_Mail_Address: kbodtker@livingoceans.org

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.6.1500

Data_Quality_Information:

Lineage:

Source_Information:

Source_Contribution:

Prov (LUCO) Kelp polygons. Although dataset has been generalized and contains minimal attributes, the following metadata description provides a detailed data collection methodology report for data sources merged from all available LUCO data. Metadata pasted below:
Marine Plants 2.5.1 Kelp Beds
Data Layers: KELPJOHN: Polygons of kelp beds in Johnstone Strait. KELPMID: Polygons of kelp beds in the Central Coast. MPLANTCC: Kelp distribution for portions of the Central Coast (1:7200). MPLANTJS: Kelp distribution for portions of Johnstone Strait (1:7200).
Data for kelp distribution in Johnstone Strait (KELPJOHN) and the Central Coast (KELPMID) was obtained from nautical charts and sailing guides. Polygons, based on the kelp symbol shown on the charts and verbal descriptions from the sailing guides, were delimited on the nautical charts and digitized. The charts had no indication of the species of kelp. MPLANTCC was digitized from 1:7200 scale mylar maps supplied by Barron Carswell at the Ministry of Agriculture, Fisheries and Food. The mylar maps were created from 1993 aerial surveys and associated ground truthing. They display high and low density beds of Macrocystis and Nereocystis on the Central Coast in the Bardwell Group, McMullin Group, Goose Group, Stirling Island-Hakai Pass and Cultus Sound areas. Two problems were encountered when incorporating this data layer. First, there were no co-ordinates on the maps to allow for accurate registration. Registration tics were generated using the coastline but high registration errors followed because of significant differences between the digital and source map coastlines. Secondly, because of the differences between the two coastlines some kelp polygons fell on top of the digital coastline. These polygons were shifted so all kelp polygons fell within water. Because of the poor registration and differences in coastline this data should be considered accurate only to a scale of 1:40 000. MPLANTJS are concentrations of Macrocystis and Nereocystis identified in the surveys conducted in the following areas: NE Vancouver Island (1983, 1989) between Ledge Point and Dillon Point including the NW shore of Malcolm Island Northern Vancouver Island (1976) from Cape Sutil to the Scott Islands and the north shores of Hope, Negei and Balaklava Islands Areas identified by the survey were generalized onto the appropriate nautical chart and digitized. The mapping coverage of near surface marine plant concentrations in Johnstone Strait is considered comprehensive. Charts for the Central Coast are generally older and of a smaller scale. Therefore the kelp data should not be considered comprehensive, except for the areas covered by the MPLANTCC digital map file. Sub-surface marine plant distribution has not been comprehensively mapped.

Source_Information:

Source_Contribution:

LOS Kelp data. Shapefile Name: Kelp_bc_merge8. Several overlapping sources for "kelp" were merged together by Living Oceans Society. The only features used were specifically where sourcethm = flora_pc_qci1_bu and qci_py.shp. flora_pc_qci1_bu represents the 2000 Sloan and Bartier dataset with points buffered by 100m. qci_py.shp represents provincial shorezone polygon (1 only) created from oblique aerial videos

Source_Information:

Source_Contribution:

Parks Canada Pacific Rim raster data. Dataset Name: main_pp. Giant Kelp confidence weighted abundance raster. Metadata report: The cell values of each confidence weighted abundance raster range from some negative extreme (representing areas that we are confident the species is absent) to zero (representing areas for which we have no good basis for judgement of relative abundance i.e. data sources conflict and/or we have no data for the area) to some extreme positive value (representing areas that we are confident have high abundance of the species). Intermediate negative and positive values represent an index (product) of our confidence in the data source and relative abundance.
Some known false values exist (in particular values in the vicinity of 329086E,5417687N (UTM10, Nad83) are erroneous and should be set to zero as they are associated with an input data point with incorrect coordinates).

Source_Information:

Source_Contribution:

flora_pc_qci1_bu.shp. Dataset was created by buffering points (100m) from the Sloan and Bartier database of marine plants in Gwaii Haanas. Used shapefile to update LOS records with Kelp species attribute information.

Process_Step:

Process_Description:

The methods used to combine datasets to identify areal extents of Giant Kelp presence are as follows: Convert Prov (LUCO) Kelp dataset to feature class using feature class to feature class.

Process_Step:

Process_Description:

Defined and projected from an Unknown Coordinate System to NAD 1983 Albers imported from LOS's kelp_bc_merge8 dataset using Define Projection tool. Note: Original coverage had an undefined coordinate system. Metadata review revealed a projection was previously assigned but was not defined. To determine projection, tested alignment with a known coastline dataset with BC Albers projection. Prov kelp dataset aligned well with data. Hence, NAD 1983 Albers projection was assumed and used to define the projection.

Process_Step:

Process_Description:

Extracted records from LOS Kelp dataset where sourcethm = flora_pc_qci1_bu and qci_py.shp. Using field calculator, calculated Feature field to "Kelp". Merged LOS data into provincial Kelp (LUCO) dataset using merge tool to create Prov_Kelp_Master dataset. Removed 2 eelgrass records from Kelp "master" dataset. Extracted all Giant Kelp polygons from "master" dataset to create final Giant Kelp feature layer. Standardized "Species" column to list the common name of the marine feature.

Process_Step:

Process_Description:

Generalized Giant Kelp polygons using dissolve tool to eliminate boundaries between touching polygons.

Process_Step:

Process_Description:

Prepared Parks Canada Pacific Rim dataset (main_pp): Used a conditional evaluation to assign gridcode values between 0 and 1 a value of 1. Function used: CON(<condition>, <true_expression>}, {false_expression}}. Code entered into GRID prompt: outgrid = con(main_pp >0 && main_pp <= 1, 1, main_pp). Converted raster floating point values to integer using INT function (GRID command) (outgrid = int(name of grid)). Code entered into GRID prompt: main_int = int(main_pp).

Process_Step:

Process_Description:

Converted grid to coverage using GRIDPOLY Arc command (Gridpoly <in_grid> <out_cover>). Code entered into Arc prompt: gridpoly main_int main.

Process_Step:

Process_Description:

Converted Pacific Rim coverage to feature class using feature class to feature class tool.

Process_Step:

Process_Description:

Grouped "GridCode" values into 3 categories (no data (0), presence (> 0), absence (< 0)) using field calculation. Dim iResult As Integer
If [GRID_CODE] < 0 Then iResult = -1 Elseif [GRID_CODE] > 0 Then iResult = 1 Elseif [GRID_CODE] = 0 Then iResult = 0 End If

Process_Step:

Process_Description:

Re-projected data from UTM Zone 10N to NAD 1983 Albers imported from LOS's kelp_bc_merge8 dataset using project tool. Exported data into 4 layers: presence (1), absence (-1), noData (0), and master (all values) based on "GridCode" attribute values. Generalized adjacent polygons using dissolve tool to eliminate boundaried between touching polygons. Changed 2 polygons categorized as an "absence" (gridcode value = < 0) to "No Data" (gridcode value = 0) within the vicinity of 329086E, 5417687N. Merged polygons to No data using advanced editor toolbar.

Process_Step:

Process_Description:

Merged Pacific Rim Giant Kelp presence (PacRim_Main_presence_diss) layer to final Giant Kelp feature layer using merge tool. Selected all Prov Giant Kelp polygons within PacRim extent and deleted.

Process_Step:

Process_Description:

Re-projected from NAD 1983 Albers to NAD 1983 BC Environment Albers imported from CMN B5_EG95 dataset using project tool.

Process_Step:

Process_Description:

Updated LOS records (where source = flora_pc_qci1_BU and qci_py.shp) with species attribute information. Species attribute information supplied within flora_pc_qci1_buff100.shp. Copy and pasted Giant Kelp features into final feature layer. Generalized using dissolve tool to eliminate boundaries between touching polygons.

Process_Step:

Process_Description:

Prov (LUCO) kelp polygons is comprised of several overlapping data layers, likely merged as layers were made available. During overlay process, polygons did not appear to have been cleaned. As a result, small sliver-like polygons and small patches of species were found. Areas under 10 sq meters were merged into its' adjacent neighbour. In cases where no adjacent polygon, feature was deleted.

Process_Step:

Process_Description:

Using select by location, selected features from Giant Kelp Final feature layer that were crossed by the boundary of Bull kelp and General Kelp final feature layers. Overlap exists in areas, especially where source = flora_pc_qci1_bu from buffered points and Pacific Rim data. Did not modify attributes or shape where polygons intersected.

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person:

Steps up to and including this one were completed by Melissa Meneghetti

Contact_Organization: Coastal Resource Mapping

Process_Step:

Process_Description: Dataset copied.

Source_Used_Citation_Abbreviation:

O:\BCMCA\Data_Processed\Plants\Canopy_Kelp\Final\Shapefiles\GiantKelp_Final

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: G-polygon

Point_and_Vector_Object_Count: 3089

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Albers Conical Equal Area

Albers_Conical_Equal_Area:

Standard_Parallel: 50.000000

Standard_Parallel: 58.500000

Longitude_of_Central_Meridian: -126.000000

Latitude_of_Projection_Origin: 45.000000

False_Easting: 1000000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000000

Ordinate_Resolution: 0.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137.000000

Denominator_of_Flattening_Ratio: 298.257222

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Resolution: 0.000025

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: BCMCA_ECO_Kelp_GiantKelp_Polygons_DATA

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: FEATURE

Attribute_Definition: Common name of the marine feature identified.

Attribute:

Attribute_Label: DATA_SOURC

Attribute_Definition: Data source

Attribute:

Attribute_Label: Dataset_ID

Attribute_Definition: Common dataset identifier as categorized by BCMCA.

Attribute:

Attribute_Label: Shape_Leng

Attribute:

Attribute_Label: Shape_Area

Attribute_Definition: Area of feature in internal units squared.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: a. The British Columbia Marine Conservation Analysis (BCMCA)

Contact_Instructions: See www.bcmca.ca for distribution details

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 2.832

Metadata_Reference_Information:

Metadata_Date: 20100831

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Living Oceans Society (for BCMCA)

Contact_Person: Carrie Robb

Contact_Position: GIS Specialist

Contact_Address:

Address_Type: mailing and physical address

Address: 1405-207 W. Hastings St.

City: Vancouver

State_or_Province: BC

Postal_Code: V6B 1H7

Country: Canada

Contact_Voice_Telephone: (604) 696-5044

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile