Desmarestia_tortuosa_MARXAN

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: December, 2009

Title: Desmarestia_tortuosa_MARXAN

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: Ecological Data

Publication_Information:

Publisher: BCMCA

Online_Linkage:

\\vancouverserver\gis\BCMCA\data4Marxan_May2010\Plants\plant_marxan_features.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 Desmarestia tortuosa presence that helps inform the marine feature identified at the BCMCA Marine Plants Workshop. Data presented as 2km planning units for Marxan analysis.

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. 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: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -127.667325

East_Bounding_Coordinate: -125.037713

North_Bounding_Coordinate: 50.618888

South_Bounding_Coordinate: 48.862040

Keywords:

Theme:

Theme_Keyword_Thesaurus:

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

Theme_Keyword: Desmarestia tortuosa

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_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:

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>

Source_Information:

Source_Contribution: BCMCA 2 km x 2 km planning units for the Canadian Pacific EEZ.

Process_Step:

Process_Description:

<<The methods used to combine datasets to identify areal extents of Desmarestia tortuosa 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 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. 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 Desmarestia tortuosa 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:

Steps up to and including this one completed by Melissa Meneghetti

Contact_Organization: Coastal Resource Mapping

Process_Step:

Process_Description:

The Shape to Centroid function in XTools was used to export a new point feature class containing the original point locations. This came as a recommendation by BCMCA Algae experts who suggested that algae features would be best quantified by occurence rather than area in planning units for Marxan analysis.

Process_Date: Dec 1, 2009

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Mathew Evans

Contact_Organization: BCMCA

Contact_Position: GIS Contractor

Process_Step:

Process_Description:

Planning units intersecting algae points were selected and exported to a new feature class.The ID field was created and populated with a MARXAN ID. Lastly, the PRESENCE field was created and populated with a value of '1'.

Process_Date: Dec 2, 2009

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Mathew Evans

Contact_Organization: BCMCA

Contact_Position: GIS Contractor

Process_Step:

Process_Description: Unit ID updated to match new BCMCA planning unit IDs

Source_Used_Citation_Abbreviation:

O:\BCMCA\Data_Andy_temp_June07\PlantsMetadata\Desmarestia_tortuosa_MARXAN.xml

Process_Date: June 2010

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Andy Pettersson

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: 7

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: 0.000606

Ordinate_Resolution: 0.000606

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: Desmarestia_tortuosa_MARXAN

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: UNIT_ID

Attribute_Definition: Unique planning unit ID

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.

Attribute:

Attribute_Label: ID

Attribute_Definition: Unique Marxan ID

Attribute:

Attribute_Label: PRESENCE

Attribute_Definition: A presence/absence indicator. 1=presence, 0=absence

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: 20100617

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Andy Pettersson

Contact_Organization: BCMCA

Contact_Position: GIS Contractor

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

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