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Eelgrass Beds 2013

SDE Feature Class

Tags
biota, BIOLOGY, coastal, environment, submerged aquatic vegetation (SAV), Zostera marina, eelgrass, oceans, habitat


Summary

Eelgrass beds along the Maine coast have been mapped in order to better understand their importance as habitat, to record the present day distribution, and to aid in the identification of this sensitive.

Description

Maine's eelgrass meadows form an important marine and estuarine coastal aquatic habitat for the state. Along with other plants, eelgrass forms the base of food production in the sea. Eelgrass provides shelter for juvenile fish, and invertebrates, is a site for primary settlement of the larvae of some bivalve mollusks, and in certain locations helps to stabilize unconsolidated sediments and shorelines. In August 2013, Casco Bay was flown and photographed. Photography was timed near low tides with low wind velocity, good water clarity, and maximum biomass of eelgrass. These factors aid in the detection of the subtidal portion a bed. Polygons delineating stands of eelgrass were screen digitized and coded using a four category scale of percent cover. Verification was carried out by boat, on foot, and by plane. Though dense patches of eelgrass approximately 6 meters in diameter and less can be identified under good conditions and in some cases were mapped, a conservative estimate of the minimum mapping unit is 150 square meters. This represents a stand of approximately 14 meters in diameter.

Credits

Casco Bay Estuary Partnership with funding and project management provided by Maine Department of Environmental Protection

Use limitations

Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002, and coordinated by MEGIS.

Extent

West  -70.253583    East  -69.841894
North  43.932984    South  43.589188

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, oceans


*Content type  Downloadable Data


Theme keywords  biota, environment, oceans

Thesaurus
Title ISO 19115 Topic Categories




Theme keywords  BIOLOGY, coastal, submerged aquatic vegetation (SAV), Zostera marina, eelgrass, habitat

Citation 

Title Eelgrass Beds 2013
Publication date 2013-12-16 00:00:00


Edition Final


Presentation formats  digital map
FGDC geospatial presentation format  vector digital data


Series
Name Casco Bay Eelgrass

Other citation details This is the third mapping of eelgrass distribution throughout Casco Bay. The previous mapping took place from 1993/94 and 2001/02.


Citation Contacts 

Responsible party
Organization's name Seth Barker, Independent Contracter
Contact's role  originator


Resource Details 

Dataset languages  English (UNITED STATES)


Spatial representation type  vector


Graphic overview
File name metadata.jpg

*Processing environment Microsoft Windows Server 2003 Version 5.2 (Build 3790) Service Pack 2; Esri ArcGIS 10.1.1.3143


Credits
Casco Bay Estuary Partnership with funding and project management provided by Maine Department of Environmental Protection

ArcGIS item properties
*Name GISVIEW.MEGIS.Eelgrass2013
*Location Server=sql-gisview-prod.som.w2k.state.me.us; Service=sde:sqlserver:sql-gisview-prod.som.w2k.state.me.us,1633; Database=GISVIEW; User=MEGIS; Version=dbo.DEFAULT
*Access protocol ArcSDE Connection

Extents 

Extent
Geographic extent
Bounding rectangle
West longitude -70.299
East longitude -69.831
South latitude 43.555
North latitude 43.936

Extent
Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -70.253583
*East longitude -69.841894
*North latitude 43.932984
*South latitude 43.589188
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude 399375.440600
*East longitude 432041.963800
*South latitude 4827001.246200
*North latitude 4864777.988900
*Extent contains the resource Yes

Resource Points of Contact 

Point of contact
Individual's name Curtis Bohlen
Organization's name Casco Bay Estuary Partnership
Contact's position Director
Contact's role  point of contact


Contact information


Resource Maintenance 

Resource maintenance
Update frequency  as needed


Resource Constraints 

Constraints
Limitations of use
Users must assume responsibility in determining the usability of this data for their purposes. Digital maps retain the accuracy of their source materials. The best use of data mapped at scales of 1:500,000 and 1:250,000 is in statewide planning and studies; at 1:100,000 in regional planning and studies; at 1:62,500 and 1:24,000 in detailed studies and local planning; and at 1:12,000 and 1:5,000 or larger scales in parcel level studies and detailed local planning. In the use of Maine GIS data, please check sources, scale, accuracy, currentness and other available information. Please confirm that you are using the correct copy of both data and metadata from the Maine GIS Data Catalog. Updates, corrections, and feedback, incorporated in the Maine GIS database are made in accordance with "Data Standards for Maine Geographic Information Systems", 2002, and coordinated by MEGIS.

Spatial Reference 

ArcGIS coordinate system
*Type Projected
*Geographic coordinate reference GCS_North_American_1983
*Projection NAD_1983_UTM_Zone_19N
*Coordinate reference details
Projected coordinate system
Well-known identifier 26919
X origin -5120900
Y origin -9998100
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 26919
Well-known text PROJCS["NAD_1983_UTM_Zone_19N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-69.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",26919]]

Reference system identifier
*Value 26919
*Codespace EPSG
*Version 7.11.2


Spatial Data Properties 

Vector
*Level of topology for this dataset  geometry only


Geometric objects
Feature class name GISVIEW.MEGIS.Eelgrass2013
*Object type  composite
*Object count 1056



ArcGIS Feature Class Properties
Feature class name GISVIEW.MEGIS.Eelgrass2013
*Feature type Simple
*Geometry type Polygon
*Has topology FALSE
*Feature count 1056
*Spatial index TRUE
*Linear referencing FALSE



Geoprocessing history 

Process
Process name
Date 2014-02-26 10:55:22
Tool location C:\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Data Management Tools.tbx\ChangePrivileges
Command issued
ChangePrivileges 'Database Connections\SQL.GISVIEW.MEGIS.sde\GISVIEW.MEGIS.Eelgrass2013' Public GRANT #
Include in lineage when exporting metadata No


Distribution 

Distribution format
*Name SDE Feature Class


Fields 

Details for object GISVIEW.MEGIS.Eelgrass2013 
*Type Feature Class
*Row count 1056
Definition
polygon attribute table
Definition source
QGIS


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 COVER
 
*Alias Cover
*Data type SmallInteger
*Width 2
*Precision 5
*Scale 0
Field description
Eelgrass percent cover based on crown cover categories as adapted by Orth et al and described in Orth, R.J., J.F. Nowak, D.J. Wilcox, J.R. Whiting, and L.S. Nagey. 1998. Distribution of Submerged Aquatic Vegetation in the Chesapeake Bay and Tributaries and the Coastal Bays –1997. VIMS Special Scientific Report Number 138. 351 pp.
Description source
user defined
List of values
Value 3
Description gt 40% to 70% cover


Value 4
Description 70% to 100% cover


Value 2
Description gt 10% to 40% cover


Value 0
Description NULL (intertior polygon, no eelgrass)


Value 1
Description gt 0% to 10% cover




Field HECTARES
 
*Alias Hectares
*Data type Double
*Width 8
*Precision 18
*Scale 4
Field description
Area of polygon in hectares
Description source
user calculated


Field ID
 
*Alias id
*Data type Double
*Width 8
*Precision 10
*Scale 0
Field description
Recalculated prior to publication. ID = FID + 1
Description source
QGIS
Description of values Sequential unique whole numbers that are automatically generated.




Field YEAR
 
*Alias Year
*Data type String
*Width 12
*Precision 0
*Scale 0
Field description
Calendar year that photography was aquired.
Description source
Date of photography
Range of values
Minimum value 2013
Maximum value 2013

Beginning date of values 2013-01-01
Ending date of values 2013-01-01




Field ACRES
 
*Alias Acres
*Data type Double
*Width 8
*Precision 18
*Scale 4
Field description
Area of polygon in acres
Description source
user calculated


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 SHAPE.area
 
*Alias SHAPE.area
*Data type Double
*Width 0
*Precision 0
*Scale 0




Field SHAPE.len
 
*Alias SHAPE.len
*Data type Double
*Width 0
*Precision 0
*Scale 0






Overview Description
Entity and Attribute Overview CascoBayEelgrass2013 POLYGONS are attributed with percent of eelgrass COVER.




Overview Description
Entity and Attribute Overview CascoBayEelgrass2013 POLYGONS are attributed with percent of eelgrass COVER.




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 2014-03-12


ArcGIS metadata properties
Metadata format ArcGIS 1.0
Metadata style FGDC CSDGM Metadata
Standard or profile used to edit metadata FGDC


Created in ArcGIS for the item 2014-02-26 10:53:56
Last modified in ArcGIS for the item 2014-03-12 14:03:21


Automatic updates
Have been performed Yes
Last update 2014-03-12 13:57:39


Metadata Contacts 

Metadata contact
Organization's name Seth Barker, Independent Contracter
Contact's role  point of contact


FGDC Metadata (read-only) 

Entities and Attributes 

Detailed Description
Entity Type
Entity Type LabelGISVIEW.MEGIS.Eelgrass2013
Entity Type Definition
polygon attribute table
Entity Type Definition SourceQGIS

Attribute
Attribute LabelOBJECTID
Attribute Definition
Internal feature number.
Attribute Definition SourceESRI
Attribute Domain Values
Unrepresentable Domain
Sequential unique whole numbers that are automatically generated.

Attribute
Attribute LabelCOVER
Attribute Definition
Eelgrass percent cover based on crown cover categories as adapted by Orth et al and described in Orth, R.J., J.F. Nowak, D.J. Wilcox, J.R. Whiting, and L.S. Nagey. 1998. Distribution of Submerged Aquatic Vegetation in the Chesapeake Bay and Tributaries and the Coastal Bays –1997. VIMS Special Scientific Report Number 138. 351 pp.
Attribute Definition Sourceuser defined
Attribute Domain Values
Enumerated Domain
Enumerated Domain Value3
Enumerated Domain Value Definition
gt 40% to 70% cover
Enumerated Domain
Enumerated Domain Value4
Enumerated Domain Value Definition
70% to 100% cover
Enumerated Domain
Enumerated Domain Value2
Enumerated Domain Value Definition
gt 10% to 40% cover
Enumerated Domain
Enumerated Domain Value0
Enumerated Domain Value Definition
NULL (intertior polygon, no eelgrass)
Enumerated Domain
Enumerated Domain Value1
Enumerated Domain Value Definition
gt 0% to 10% cover

Attribute
Attribute LabelHECTARES
Attribute Definition
Area of polygon in hectares
Attribute Definition Sourceuser calculated

Attribute
Attribute LabelID
Attribute Definition
Recalculated prior to publication. ID = FID + 1
Attribute Definition SourceQGIS
Attribute Domain Values
Unrepresentable Domain
Sequential unique whole numbers that are automatically generated.

Attribute
Attribute LabelYEAR
Attribute Definition
Calendar year that photography was aquired.
Attribute Definition SourceDate of photography
Attribute Domain Values
Range Domain
Range Domain Minimum2013
Range Domain Maximum2013
Beginning Date of Attribute Values2013-01-01
Ending Date of Attribute Values2013-01-01

Attribute
Attribute LabelACRES
Attribute Definition
Area of polygon in acres
Attribute Definition Sourceuser calculated

Attribute
Attribute LabelSHAPE
Attribute Definition
Feature geometry.
Attribute Definition SourceESRI
Attribute Domain Values
Unrepresentable Domain
Coordinates defining the features.

Attribute
Attribute LabelSHAPE.area

Attribute
Attribute LabelSHAPE.len

Overview Description
Entity and Attribute Overview
                            CascoBayEelgrass2013 POLYGONS are attributed with percent of eelgrass COVER.
                          

Overview Description
Entity and Attribute Overview
                            CascoBayEelgrass2013 POLYGONS are attributed with percent of eelgrass COVER.