BCMCA_ECO_Algae_Dictyoneurum_californicum_Data_nov12

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: April 2013

Title: BCMCA_ECO_Algae_Dictyoneurum_californicum_Data_nov12

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage:

\\data-server\gis\BCMCA\Repository\data_processed_namesStandardized\Plants\BCMCA_Algae_Final_updated2013.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 Dictyoneurum californicum (including species previously identified as Dictyoneuropsis reticulata) presence that helps inform the marine feature identified at the BCMCA Marine Plants Workshop.

Supplemental_Information:

**Please note that this feature has been updated since the Marxan analyses were run and the feature data no longer match the Marxan-ready data.**
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. 2. CDC. Identifies species as element occurrence's.

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: -128.492522

East_Bounding_Coordinate: -122.776921

North_Bounding_Coordinate: 52.030428

South_Bounding_Coordinate: 48.311401

Keywords:

Theme:

Theme_Keyword: Algae

Theme_Keyword: Dictyoneurum californicum

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_Address:

Address_Type: mailing and physical address

Contact_Electronic_Mail_Address: info@bcmca.ca

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:

CDC Algae data. Dataset name: alga_eos.shp. Mapped areas of land/water (Element Occurrence) in which a species (algae) or ecological community is, or was, present and provincial ranking applied. The CDC follows NatureServe mapping methodolgy whereby Element Occurances are depicted as polygons. Locations are supplied via lat/long coordinates, and bufferred according to locational uncertainties. Includes rare algae names for 50 species short listed. Original metadata document: Online <http://www.env.gov.bc.ca/cdc/gis/eo_data_fields_06.htm>

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 Dictyoneurum californicum 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 CDC dataset:
Re-projected CDC's alga_eos.shp from an Unknown Coordinate System to NAD 1983 BC Environment Albers imported from CMN's BS_EG95.shp. Converted shapefile to feature class using feature class to feature class tool. Selected from CDC_algae_eos.shp all marine target features identified in Plants workshop and exported into separate feature classes. Using ArcMap, all records applicable to workshop target species were selected in the attributes table, exported into a feature class, and stored within the Algae Geodatabase.

Source_Used_Citation_Abbreviation:

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

Process_Step:

Process_Description:

Added 3 fields to CDC feature layers: Feature (common name of marine feature identified), SOURCE_DATA (dataset shapefile name), 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.

Process_Step:

Process_Description:

Populated the fields using the calculate field tool in batch mode. Feature fields were calculated to equal the "SNAME" column. SOURCE_DATA fields were calculated to equal the name of the shapefile or feature class that the data was derived from. Dataset_ID fields were calculated to equal the common dataset identifier as categorized by BCMCA.

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 coords.

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. Deleted one erroneous UBC point whose recorded coordinates placed point in the center of southern vancouver island. UBC location information indicates sampling was taken on Sombrio Beach (West Coast VI). CDC data has a polygon located at Sombrio Beach with same collection year and references UBC Herbarium. Based on attributes, the assumption was made that the two points represent the same area, however, UBC coordinate data was recorded incorrectly. Deleted "erroneous" UBC point and retained CDC data. Deleted 3 overlapping (or within close proximity) UBC points. Attribute comparison revealed identical survey collection dates and location descriptions. 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** 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:

-->To prepare both CDC and UBC feature layers for merge:
Searched for duplicate records between CDC and UBC feature layers. Overlaid both datasets and searched for any UBC data points (unbuffered) that fell within the polygonal area of an CDC polygon. If a UBC point was found within, or in close proximity to a CDC polygon, the observation date of both datasets was reviewed and if found to be the same, the UBC point was deleted.

Process_Step:

Process_Description:

To simplify potential issues in the merging process, all CDC feature class layers and all UBC feature class layers were first merged together separately using the merge tool. These were then merged together for a second time so the end resultant feature layer included both UBC and CDC data layers. Individual species were then extracted from the combined datasets.
During UBC merge only the following fields were retained: Date, LattDD (decimal degree latitude), LongDD, BuffDist_m_ (Buffer distance in meters), Feature (Genus and species of workshop target), Source_data (the original shapefile, feature class, or table the information was obtained from), and DatasetID (the common dataset identifier as found within BCMCA dataset DB notes). All records with 0,0 coordinates were removed.
During the CDC merge, only the following fields were retained: LATITUDE, LONGITUDE, DATE_, BuffDist_m_ (Buffer distance in meters), Feature (Genus and Species name of target feature as identified within Plants), Source_data (the original shapefile, feature class, or table the information was obtained from), and DatasetID. **Note: survey date field had its name changed to DATE_ to match the UBC column naming convention.

Process_Step:

Process_Description: Merged the CDC and UBC feature layers using merge tool.

Process_Step:

Process_Description:

Extracted Dictyoneurum californicum features from the merged CDC and UBC data: Within ArcMap, all records applicable to target feature were selected in the attributes table and exported into a feature class. (right click feature class in table of contents and select data -> export data).

Process_Step:

Process_Description: Created Metadata.

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

Process_Step:

Process_Description:

Using field calculator, selected all CDC records and populated BuffDist_m field to equal "CDC Determined".

Process_Step:

Process_Description: Updated metadata.

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

Process_Step:

Process_Description:

Data for Dictyoneuropsis reticulata was merged with the data for Dictyoneurum californicum based on on advice that D. reticulata is a synonym of D. californicum

Process_Date: April 2013

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Carrie Robb

Contact_Organization: BCMCA

Contact_Position: Data Manager

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: 17

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_Dictyoneurum_californicum_Data_nov12

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).

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: 20130503

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: BCMCA

Contact_Person: Carrie Robb

Contact_Position: Data Manager

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@bcmca.ca

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