Eelgrass - Tomales Bay [ds890]

SDE Feature Class

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Tags
Eelgrass, northern California estuaries


Summary

To show the presence and extent of eelgrass (Zostera marina) habitat in northern California bays and estuaries.

Description

Eelgrass bed areas in Tomales Bay were digitized from 2010 CDFW aerial imagery. Photographs were taken on 6/29/2010 on the incoming tide following a -0.5 ft. low at 08:25. Photographs were georeferenced 5/6-5/8/2013. Ground-truthing took place 5/13/2013-7/25/2013 This feature was finalized on 7/26/2013.

Bed areas in the Estero Americano were surveyed between June and September 2014 by CDFW staff using global positioning system (GPS) technology, observation, and field notes. Polygon features were digitized from the survey data with the aid of 2012 National Agriculture Imagery Program (NAIP) imagery.

Bed areas in the Albion River estuary were initially surveyed on 10/3/2014 by CDFW staff using GPS, observations, and field notes, with a follow-up survey on 5/21/2015. Polygon features were digitized from the survey data with the aid of 2012 NAIP imagery.

Bed areas in the Big River estuary were surveyed on 9/21/2015 by CDFW staff using global positioning system (GPS) technology, observations, and field notes. Polygon features were digitized from the survey data with the aid of 2012 NAIP imagery.

The resulting shapefile is a partial representation of eelgrass ( Zostera marina ) habitat in northern California's bays and estuaries. Itis a work in progress and will be updated to include additional estuaries as data become available.

Credits

Shapefile created by Andrew Weltz of CDFW's Aquaculture and Bay Management Project. Tomales Bay features were digitized from aerial photographs taken by Ron VanBenthuysen of CDFW and were georeferenced by A. Weltz.

Use limitations

Bed locations and metrics are approximate and are based on conditions at the time surveyed. Not for navigation use.

Extent

West -123.787282 East -122.832726
North 39.328561 South 38.072137

Scale Range
Maximum (zoomed in) 1:5,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata

Topics and Keywords

Themes or categories of the resource biota, environment


* Content type Downloadable Data
Export to FGDC CSDGM XML format as Resource Description No

Place keywords Tomales Bay, California

Theme keywords Plant, Vegetation, sn: Zostera marina, cn: Eelgrass

Citation

Title Eelgrass - Tomales Bay [ds890]
Publication date 2016-05-1800:00:00


Presentation formats * digital map


Citation Contacts

Responsible party
Organization's name California Department of Fish and Wildlife
Contact's role originator


Responsible party
Individual's name Andrew Weltz
Organization's name California Department of Fish and Wildlife
Contact's position Environmental Scientist
Contact's role point of contact


Contact information
Phone
Voice 707 576 2896

Address
Type both
Delivery point 5355 Skylane Blvd., Suite B
City Santa Rosa
Administrative area CA
Postal code 95403
e-mail address Andrew.Weltz@wildlife.ca.gov



Resource Details

Dataset languages * English(UNITED STATES)
Dataset character set utf8 - 8 bit UCS Transfer Format


Spatial representation type * vector


* Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959


Credits
Shapefile created by Andrew Weltz of CDFW's Aquaculture and Bay Management Project. Tomales Bay features were digitized from aerial photographs taken by Ron VanBenthuysen of CDFW and were georeferenced by A. Weltz.
ArcGIS item properties
* Name Eelgrass - Tomales Bay [ds890]
* Size 0.595
* Location Server=; :; Database=; User=; Version=
* Access protocol ArcSDE Connection

Extents

Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -123.787282
* East longitude -122.832726
* North latitude 39.328561
* South latitude 38.072137
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude -326261.006247
* East longitude -248067.053566
* South latitude 12609.816295
* North latitude 149623.303062
* Extent contains the resource Yes

Resource Maintenance

Resource maintenance
Update frequency irregular


Resource Constraints

Constraints
Limitations of use

Bed locations and metrics are approximate and are based on conditions at the time surveyed. Not for navigation use.


Spatial Reference

ArcGIS coordinate system
* Type Projected
* Geographic coordinate reference GCS_WGS_1984
* Projection WGS_1984_Web_Mercator_Auxiliary_Sphere
* Coordinate reference details
Projected coordinate system
Well-known identifier 102100
X origin -20037700
Y origin -30241100
XY scale 10000
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.001
Z tolerance 0.001
M tolerance 0.001
High precision true
Latest well-known identifier 3857
Well-known text PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]

Reference system identifier
* Value 3857
* Codespace EPSG
* Version 8.6.2


Spatial Data Properties

Vector
* Level of topology for this dataset geometry only


Geometric objects
Feature class name DS0890_20160518
* Object type composite
* Object count 0



ArcGIS Feature Class Properties
Feature class name DS0890_20160518
* Feature type Simple
* Geometry type Polygon
* Has topology FALSE
* Feature count 0
* Spatial index TRUE
* Linear referencing FALSE



Geoprocessing history

Process
Date 2016-05-1815:25:02
Tool location c:\program files (x86)\arcgis\desktop10.3\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project
Command issued
Include in lineage when exporting metadata No


Process
Date 2016-05-1815:25:15
Tool location c:\program files (x86)\arcgis\desktop10.3\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
Include in lineage when exporting metadata No


Distribution

Distribution format
* Name SDE Feature Class


Transfer options
* Transfer size 0.595


Online source
Location http://bios.wildlife.ca.gov
Function performed information

Online source
Location ftp://ftp.wildlife.ca.gov/BDB/GIS/BIOS/Public_Datasets/800_899/ds890.zip
Function performed download

Fields

Details for object DS0890_20160518
* Type Feature Class
* Row count 0
Definition
__
Definition source
__


Field OBJECTID
* Alias OBJECTID
* Data type OID
* Width 4
* Precision 10
* Scale 0
* Field description
Internal feature number.
* Description source
Esri
* Description of values
Sequential unique whole numbers that are automatically generated.




Field Shape
* Alias Shape
* Data type Geometry
* Width 4
* Precision 0
* Scale 0
* Field description
Feature geometry.
* Description source
Esri
* Description of values
Coordinates defining the features.




Field Id
* Alias Id
* Data type Integer
* Width 4
* Precision 10
* Scale 0




Field Habitat
* Alias Habitat
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
A description of the habitat type represented by feature
Description source
CDFW


Field Source
* Alias Source
* Data type String
* Width 25
* Precision 0
* Scale 0
Field description
Description of data source
Description source
CDFW


Field area_acres
* Alias area_acres
* Data type Double
* Width 8
* Precision 38
* Scale 8
Field description
Calculation of area represented by feature in acres.
Description source
CDFW


Field Location
* Alias Location
* Data type String
* Width 35
* Precision 0
* Scale 0
Field description
Description of location of feature.
Description source
CDFW


Field Shape.STArea()
* Alias Shape.STArea()
* Data type Double
* Width 0
* Precision 0
* Scale 0




Field Shape.STLength()
* Alias Shape.STLength()
* Data type Double
* Width 0
* Precision 0
* Scale 0






Metadata Details

* Metadata language English(UNITED STATES)
* Metadata character set utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata * dataset
Scope name * dataset


* Last update 2016-05-18


ArcGIS metadata properties
Metadata format ArcGIS1.0
Standard or profile used to edit metadata FGDC
Metadata style FGDC CSDGM Metadata


Created in ArcGIS for the item 2016-05-1815:25:00
Last modified in ArcGIS for the item 2016-05-1815:25:14


Automatic updates
Have been performed Yes
Last update 2016-05-1815:25:14

Item location history
Item copied or moved 2016-05-1815:14:30
From P:\WorkArea\ds800-899\890-Eelgrass_Tomales_Bay_CDFW\v2\v2_work\ds890
To \\geodata.\\ds800-899\890-Eelgrass_Tomales_Bay_CDFW\v2\v2_final\ds890


Metadata Contacts

Metadata contact
Individual's name Andrew Weltz
Organization's name California Department of Fish and Wildlife
Contact's position Environmental Scientist
Contact's role point of contact


Contact information
Phone
Voice 707 576 2896

Address
Type both
Delivery point 5355 Skylane Blvd., Suite B
City Santa Rosa
Administrative area CA
Postal code 95403
e-mail address Andrew.Weltz@wildlife.ca.gov



Metadata Maintenance

Maintenance
Update frequency irregular


Thumbnail and Enclosures