BCMCA_ECO_Algae_Postelsia_palmaeformis_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_Algae_Postelsia_palmaeformis_Data

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage:

\\data-server\gis\BCMCA\Repository\data_processed_namesStandardized\Plants\BCMCA_Algae_Final_01212009.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 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 Postelsia palmaeformis presence that helps 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 for data limitations and usage. Title or link is provided within source information. Data was collected and merged by target feature layer using the following data sources: 1. UBC Herbarium (Algae Export.XLS). Identifies various algae species observations.

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: -128.000127

East_Bounding_Coordinate: -124.310780

North_Bounding_Coordinate: 50.974548

South_Bounding_Coordinate: 48.356731

Keywords:

Theme:

Theme_Keyword_Thesaurus:

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

Theme_Keyword: Postelsia

Theme_Keyword: Algae

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: BCMCA

Contact_Person: Karin Bodtker

Contact_Position: Co-chair

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

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:

UBC Herbarium (Algae Export). Raw data: Algae_Export.xls. Each recorded specimens represents sample collected within UBC Herbarium. Database contains 50 records for Postelsia palmaeformis, 104 records for Pterygophora californica, and 230 records for all other features. Only online reference index: <http://www.botany.ubc.ca/herbarium/algae/index.html>

Process_Step:

Process_Description:

<<The methods used to combine datasets to identify areal extents of Postelsia presence are as follows >>

Source_Used_Citation_Abbreviation:

\\CRMLTD03\E$\F\Crm1143\Source\080818_SourceDocs\Original_Data\Plants\BCMCA_Plants.gdb

Process_Step:

Process_Description:

--> To prepare UBC dataset:
Converted UBC Algae Export.xls table into dbase format so that the XY coordinates stored in the records could be plotted spatially and exported as point feature classes. In the Algae Export excel sheet, majority of the coordinates had been converted to decimal degrees in two unnamed columns that were formatted to "scientific" and were displayed in scientific notation. This column was changed to "number" format to two decimal places. Two new columns were created to store decimal degrees: "LatDD" and "LongDD". For the coordinates not previously converted into decimal degrees: converted using an excel conversion formula (can be found in many formats online). The longitude and latitude columns have the original DM/DMS coordinates.

Process_Step:

Process_Description:

Formatted excel spreadsheets for conversion to DBF format. Created new columns in all three worksheets, labeled "LatDD" and "LongDD" to store decimal degrees. Columns without headings or information were removed. Below is a summary of columns removed: From the Postelsia worksheet: Det. Date, Subsp., Subspauth, Var., Varauth.
From the Pterygophora worksheet: Subsp, Subspauth, Var., Varauth., Det. Date
From the Others worksheet: Subsp., Subspauth, Var., Varauth.
Saved excel worksheets as dbase version 4. The saved dbf tables were reviewed to ensure they contained the same amount of records as original excel worksheets, and the decimal degree coordinates were tested against the shoreline trim to ensure the points were in the correct locations around vancouver island. A number of records did not have coordinates and showed up at 0 lat, 0 long. These were deleted during processing.

Process_Step:

Process_Description:

All records were plotted and displayed in Arcmap using display XY data tool: Added the DBF table to ArcMap, right clicked, selected display XY Data. Selected appropriate Y and X field LatDD and LongDD respectively. Set the coordinate system to GCS North American 1983.

Process_Step:

Process_Description:

Turned event layer into feature class and projected data: Right click the event layer and select data, export data and saved as a shapefile. Projected shapefile using the project tool from GCS North American 1983 to NAD 1983 BC Environment Albers imported from CMN's S_EG95.shp. Converted shapefile to feature class using feature class to feature class tool.

Process_Step:

Process_Description:

Extracted target features (as identified within Plants workshop) into separate feature layers. Duplicate UBC points that had identical attribute and spatial information were deleted (One group had multiple inventory years, in which case, kept the point with the most recent survey date). Added 3 new fields to each of the species-specific feature classes. New fields are as follows: Feature (common name of marine feature identified), SOURCE_DATA (dataset shapefile name), and Dataset_ID (dataset common identifier as per BCMCA dataset DB notes). To add fields, used the add field tool in batch mode (right click tool in toolbox and select batch) to update all feature classes at once. Click and drag each feature into the batch field window to populate one row for each feature. To set each feature classes' tool parameters, scroll to the right in the table.
Populated the fields using the calculate field tool in batch mode. Feature fields were calculated to equal the "scientific name" column. SOURCE_DATA fields were calculated using the dataset source name (i.e. Algae Export.xls). Dataset_ID fields were calculated using the common dataset identifier.

Process_Step:

Process_Description:

Buffered extracted point feature layers to create polygon representations: **The CDC points are buffered by an uncertainty distance determined using NatureServe’s methodology (<http://www.natureserve.org/prodServices/eodraft/7.pdf>). To keep the datasets consistent, the UBC points were also buffered by a width determined by the precision of the recorded coordinates. On a spherical surface at sea level, one latitudinal second measures 30.82 metres and one latitudinal minute 1849 metres, and one latitudinal degree is 110.9 kilometres. These values were rounded up and points that were precise to the second were buffered by 50 m and points that were precise to the minute were buffered by 2000 m. When the precision varied between the latitude and longitude, the points were buffered by the least precise coordinates.** Created new field called BuffDist_m_ to show applicable buffer distance radius: 50m or 2000m. The buffer tool was used in batch mode (see batch mode explained in step 3) using the BuffDist_m_ field.

Process_Step:

Process_Description: Created Metadata.

Source_Used_Citation_Abbreviation: C:\F\Crm1143\Admin\MetaData\BullKelp_Final.xml

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: All processing steps performed by Melissa Meneghetti

Contact_Organization: Coastal Resource Mapping

Contact_Position: Spatial Analyst

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: 23

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: 0.000100

Ordinate_Resolution: 0.000100

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: 0.000100

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: BCMCA_ECO_Algae_Postelsia_palmaeformis_Data

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

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.

Attribute:

Attribute_Label: DATE_

Attribute_Definition: Observation Date

Attribute:

Attribute_Label: LATDD

Attribute_Definition:

UBC specific field. Latitude of coordinate in Decimal Degrees. Values were converted from DM and DMS from original source.

Attribute:

Attribute_Label: LONGDD

Attribute_Definition:

UBC specific field. Longitude of coordinate in Decimal Degrees. Values were converted from DM and DMS from original source.

Attribute:

Attribute_Label: Feature

Attribute_Definition: Genus and Species name of marine feature.

Attribute:

Attribute_Label: SOURCE_DATA

Attribute_Definition:

The name of shapefile, feature class or table data was derived from.

Attribute:

Attribute_Label: Dataset_ID

Attribute_Definition: Common dataset identifier as categorized by BCMCA.

Attribute:

Attribute_Label: LATITUDE

Attribute_Definition:

CDC specific field. Latitude coordinates of original observation polygons. This will not necessarily be the centroid of all polygons as some polygons were merged together keeping attributes from only one of the polygons.

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: 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: LONGITUDE

Attribute_Definition:

CDC specific field. Longitude coordinates of original observation polygons. This will not necessarily be the centroid of all polygons as some CDC polygons were merged together keeping the attributes from only one of the polygons.

Attribute:

Attribute_Label: BuffDist_m_

Attribute_Definition:

UBC specific field. Displays the value used as a buffer radius for each point location. Values are either 50m or 2000m. These values are based on locational uncertainty of original coordinates. Values accurate to the minute were buffered with 2000m radius. Values accurate to the second were buffered to 50m (rounded up from 30.82m).

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: 20130501

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

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