BCMCA_ECO_Kelp_BullKelp_Polygons_Data

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
The British Columbia Marine Conservation Analysis (BCMCA), a Tides Canada Initiatives Project
Publication_Date: November, 2009
Title: BCMCA_ECO_Kelp_BullKelp_Polygons_Data
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Ecological Data
Publication_Information:
Publisher: BCMCA
Online_Linkage:
\\CARRIE\E\Andy_Bcmca\data_processed_namedStandardized\Plants\BCMCA_CanopyFormingKelp_rev.mdb
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 human use spatial data at scales relevant to a BC coast-wide analysis.
Purpose:
The purpose of this dataset is to identify areal extents of Bull Kelp presence to help inform 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 (nelu_pp) 4. CRD nereocystis points (nereocystis_tl feature class)
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -133.306774
East_Bounding_Coordinate: -122.965772
North_Bounding_Coordinate: 54.742554
South_Bounding_Coordinate: 48.145679
Keywords:
Theme:
Theme_Keyword_Thesaurus:
REQUIRED: Reference to a formally registered thesaurus or a similar authoritative source of theme keywords.
Theme_Keyword: Bull Kelp (Nereocystis leutkeana)
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_Person_Primary:
Contact_Person: Karin Bodtker
Contact_Organization: British Columbia Marine Conservation Analysis
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: 6046965044
Contact_Electronic_Mail_Address: kbodtker@livingoceans.org
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.3.1.3500
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 dataset. 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 by100m. 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: nelu_pp. Bull 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 to 100m from the Sloan and Bartier database of marine plants in Gwaii Haanas. Used shapefile to update LOS records with Kelp species attribute information.
Source_Information:
Source_Contribution:
CRD nereocystis points. Dataset name: nereocystis _tl (feature class) located in the Subtidal_Survey of the CRD's Harbour_Atlas geodatabase.
Process_Step:
Process_Description:
The methods used to combine datasets to identify areal extents of Bull Kelp presence are as follows: Convert Prov (LUCO) Kelp dataset to feature class using feature class to feature class tool.
Source_Used_Citation_Abbreviation:
\\CRMLTD03\E$\F\Crm1143\Source\080818_SourceDocs\Original_Data\Plants\BCMCA_Plants.gdb
Process_Step:
Process_Description:
Defined and projected from an Unknown Coordinate System to NAD 1983 Albers imported from LOS's kelp_bc_merge8 dataset using the Define Projection tool. Note: Original coverage had an undefined coordinate system. Metadata review revealed a projection was previously assigned but was not defined. To determine projection, tested alignment with a known coastline dataset with BC Albers projection. Prov kelp dataset aligned well with data. Hence, NAD 1983 Albers projection was assumed and used to define the projection.
Source_Used_Citation_Abbreviation:
\\CRMLTD03\E$\F\Crm1143\Source\080818_SourceDocs\Original_Data\Plants\BCMCA_Plants.gdb
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 into provincial kelp (LUCO) dataset using merge tool to create Prov_Kelp_Master dataset. Removed 2 eelgrass records from Kelp "master" dataset. Extracted all Bull Kelp polygons from "master" dataset to create final Bull Kelp feature layer. Standardized "Species" column to list the common name of the marine feature.
Process_Step:
Process_Description:
Generalized Bull Kelp polygons using dissolve tool to eliminate boundaries between touching polygons.
Process_Step:
Process_Description:
Prepared Parks Canada Pacific Rim dataset (nelu_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(nelu_pp >0 && nelu_pp <= 1, 1, nelu_pp). Converted raster floating point values to integer using INT function (GRID command) (outgrid = int(name of grid)). Code entered into GRID prompt: nelu_int = int(nelu_pp).
Process_Step:
Process_Description:
Converted grid to coverage using GRIDPOLY Arc command (Gridpoly <in_grid> <out_cover>). Code entered into Arc prompt: gridpoly nelu_int nelu.
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 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 polygons using dissolve tool to eliminate boundaries between touching polygons. Changed 2 polygons categorized as a "presence" (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 Bull Kelp presence (AlbersPacRim_Nelu_presence_diss) dataset to final Bull Kelp feature layer using merge tool.
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 Bull 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 Bull Kelp Final feature layer that were crossed by the boundary of Giant 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_Step:
Process_Description:
Created topology and assigned "must not overlap" rule. Cleaned two overlapping Bull Kelp polygons through merge.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person:
Steps up to and including this one completed by Melissa Meneghetti
Contact_Organization: Coastal Resource Mapping
Process_Step:
Process_Description:
The nereocystis_tl feature class was buffered by 100m using the Buffer Wizard with the dissolve barriers option selected. A new feature class was output.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Mathew Evans
Contact_Organization: BCMCA
Contact_Position: GIS Contractor
Process_Step:
Process_Description:
The buffered points were merged with the BullKelp_Final feature class
Source_Used_Citation_Abbreviation: BullKelp_Final
Source_Produced_Citation_Abbreviation: BullKelp_Final_Update_Jul09
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Mathew Evans
Contact_Organization: BCMCA
Contact_Position: GIS Contractor
Process_Step:
Process_Description:
The Select By Attributes function was used to select all records where FEATURE = "". Then the Field Calculator was used to populate the selected records in the FEATURE field with "Bull Kelp". The Field Calculator was used again to populate the selected records in the DATASOURCE field with "nereocystis_tl".
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Mathew Evans
Contact_Organization: BCMCA
Contact_Position: GIS Contractor
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: 7170
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Label point
Point_and_Vector_Object_Count: 39346
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 39346
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 4
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: 0.000025
Ordinate_Resolution: 0.000025
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_BullKelp_Polygons_Data
Entity_Type_Definition_Source:
Identifies areal extents of Bull Kelp presence by merging all prepared Bull Kelp datasets.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: OBJECTID
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: FEATURE
Attribute_Definition: Common name of the marine feature identified.
Attribute:
Attribute_Label: DATA_SOURCE
Attribute_Definition: Name of the dataset the data was derived from.
Attribute:
Attribute_Label: Dataset_ID
Attribute_Definition: Common dataset identifier as categorized by BCMCA.
Attribute:
Attribute_Label: Shape_Length
Attribute_Definition: Length of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
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.
Overview_Description:
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: British Columbia Marine Conservation Analysis
Contact_Instructions: See www.bcmca.ca for distribution details
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 50.954
Metadata_Reference_Information:
Metadata_Date: 20100926
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Carrie Robb
Contact_Organization: Living Oceans Society (for BCMCA)
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 1405-207 West Hastings Street
City: Vanvouver
State_or_Province: BC
Postal_Code: V6B 1H7
Country: Canada
Contact_Voice_Telephone: 604-696-5044
Contact_Electronic_Mail_Address: crobb@livingoceans.org
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
Generated by mp version 2.9.6 on Sun Sep 26 00:05:56 2010