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Eelgrass2010

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


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 coastal habitat for protection in the case of an oil spill.

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. Between the years 2001 and 2010, sections of the coast were flown and photographed using Kodak 2448 and 2427 film at a scale of 1:12000. Areas in the present study, were flown in the months of June though September during the 2001 to 2010 time period. When possible, photography was at the time of extreme low tides, 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

This data was produced by the Maine Department of Marine Resouces, Bureau of Resource Management. Credit should always be given to the data source and/or originator when the data is transferred or printed.

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  -70.880356    East  -66.966782
North  45.112744    South  43.055169

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


Citation 

Title Eelgrass2010
Alternate titles  Maine Eelgrass Distribution, 2001-2010
Publication date 2012-05-24 00:00:00


Edition Final


Presentation formats* digital map
FGDC geospatial presentation format  vector digital data


Series
Name Maine Coastal Eelgrass

Other citation details This is the second mapping of distribution. The previous mapping took place from 1992 to 1997.


Citation Contacts 

Responsible party
Organization's name Maine Department of Marine Resources (MEDMR)
Contact's role  originator


Contact information
Phone
Voice 207-633-9500

Address
Type postal
Delivery point PO Box 8
City West Boothbay Harbor
Administrative area ME
Postal code 04575



Resource Details 

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


Status  completed
Spatial representation type* vector


Graphic overview
File name metadata.jpg

*Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3143


Credits
This data was produced by the Maine Department of Marine Resouces, Bureau of Resource Management. Credit should always be given to the data source and/or originator when the data is transferred or printed. 
ArcGIS item properties
*Name GISVIEW.MEGIS.Eelgrass2010
*Size 5.739
*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
Description
Coastal Maine
Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -70.880356
*East longitude -66.966782
*North latitude 45.112744
*South latitude 43.055169
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude 352050.185625
*East longitude 659984.586719
*South latitude 4768814.141094
*North latitude 4995474.951562
*Extent contains the resource Yes

Resource Points of Contact 

Point of contact
Organization's name Maine Department of Marine Resources (MEDMR)
Contact's role  point of contact


Contact information
Phone
Voice 207-633-9500

Address
Type postal
Delivery point PO Box 8
City West Boothbay Harbor
Administrative area ME
Postal code 04575



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.
Limitations of use
Additional on-site investigations may be required for the Maine NRPA , aquaculture lease applications, or other permitting.

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 -10200000
Y origin -9998100
XY scale 6400
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.02
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.Eelgrass2010
*Object type  composite
*Object count 5179



ArcGIS Feature Class Properties
Feature class name GISVIEW.MEGIS.Eelgrass2010
*Feature type Simple
*Geometry type Polygon
*Has topology FALSE
*Feature count 5179
*Spatial index TRUE
*Linear referencing FALSE



Data Quality 

Lineage 

Lineage statement
This file is a compilation of shape files that  were generating in the mapping process. The data file "Eelgras05" has been updated and replaced by this file.

Geoprocessing history 

Process
Process name
Date 2012-01-24 15:06:34
Tool location C:\Program Files\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Data Management Tools.tbx\CalculateField
Command issued
CalculateField eelgrassupdate location "i" VB #
Include in lineage when exporting metadata No


Process
Process name
Date 2012-01-24 15:12:52
Tool location C:\Program Files\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Data Management Tools.tbx\CalculateField
Command issued
CalculateField eelgrassupdate location "i" VB #
Include in lineage when exporting metadata No


Process
Process name
Date 2012-01-24 15:16:22
Tool location C:\Program Files\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Data Management Tools.tbx\CalculateField
Command issued
CalculateField eelgrassupdate location "i" VB #
Include in lineage when exporting metadata No


Process
Process name
Date 2012-01-24 15:20:52
Tool location C:\Program Files\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Data Management Tools.tbx\CalculateField
Command issued
CalculateField eelgrassupdate location "i" VB #
Include in lineage when exporting metadata No


Process
Process name
Date 2012-01-24 15:22:54
Tool location C:\Program Files\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Data Management Tools.tbx\CalculateField
Command issued
CalculateField eelgrassupdate location "s" VB #
Include in lineage when exporting metadata No


Process
Process name
Date 2012-05-08 11:16:04
Tool location C:\Program Files\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Data Management Tools.tbx\CalculateField
Command issued
CalculateField Eelgrass2010 OBJECTID [FID]+1 VB #
Include in lineage when exporting metadata No


Process
Process name
Date 2012-05-08 11:17:00
Tool location C:\Program Files\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Data Management Tools.tbx\CalculateField
Command issued
CalculateField Eelgrass2010 location "s" VB #
Include in lineage when exporting metadata No


Process
Process name
Date 2012-05-08 11:51:06
Tool location c:\program files\arcgis\desktop10.0\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
FeatureClassToFeatureClass "C:\Workspace12\Spill Response\EVI2012\Eelgrass2010.shp" "Database Connections\sql-gisview-prod_MEDMR(data management).sde\GISVIEW.MEDMR.EVI" Eelgrass2010 # "OBJECTID "OBJECTID" true true false 10 Double 0 10 ,First,#,C:\Workspace12\Spill Response\EVI2012\Eelgrass2010.shp,OBJECTID,-1,-1;COVER "COVER" true true false 5 Long 0 5 ,First,#,C:\Workspace12\Spill Response\EVI2012\Eelgrass2010.shp,COVER,-1,-1;YEAR "YEAR" true true false 5 Long 0 5 ,First,#,C:\Workspace12\Spill Response\EVI2012\Eelgrass2010.shp,YEAR,-1,-1;ACRES "ACRES" true true false 19 Double 8 18 ,First,#,C:\Workspace12\Spill Response\EVI2012\Eelgrass2010.shp,ACRES,-1,-1;HECTARES "HECTARES" true true false 19 Double 8 18 ,First,#,C:\Workspace12\Spill Response\EVI2012\Eelgrass2010.shp,HECTARES,-1,-1;SHAPE_area "SHAPE_area" true true false 19 Double 0 0 ,First,#,C:\Workspace12\Spill Response\EVI2012\Eelgrass2010.shp,SHAPE_area,-1,-1;SHAPE_len "SHAPE_len" true true false 19 Double 0 0 ,First,#,C:\Workspace12\Spill Response\EVI2012\Eelgrass2010.shp,SHAPE_len,-1,-1;location "location" true true false 6 Text 0 0 ,First,#,C:\Workspace12\Spill Response\EVI2012\Eelgrass2010.shp,location,-1,-1" #
Include in lineage when exporting metadata No


Process
Process name
Date 2012-07-02 13:07:33
Tool location c:\program files\arcgis\desktop10.0\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
FeatureClassToFeatureClass "Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEDMR.EVI\GISVIEW.MEDMR.Eelgrass2010" "Database Connections\GISVIEW.MEGIS.sde" Eelgrass2010 # "OBJECTID "OBJECTID" true true false 8 Double 0 10 ,First,#,Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEDMR.EVI\GISVIEW.MEDMR.Eelgrass2010,OBJECTID,-1,-1;COVER "COVER" true true false 4 Long 0 10 ,First,#,Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEDMR.EVI\GISVIEW.MEDMR.Eelgrass2010,COVER,-1,-1;YEAR "YEAR" true true false 4 Long 0 10 ,First,#,Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEDMR.EVI\GISVIEW.MEDMR.Eelgrass2010,YEAR,-1,-1;ACRES "ACRES" true true false 8 Double 8 19 ,First,#,Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEDMR.EVI\GISVIEW.MEDMR.Eelgrass2010,ACRES,-1,-1;HECTARES "HECTARES" true true false 8 Double 8 19 ,First,#,Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEDMR.EVI\GISVIEW.MEDMR.Eelgrass2010,HECTARES,-1,-1;location "location" true true false 6 Text 0 0 ,First,#,Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEDMR.EVI\GISVIEW.MEDMR.Eelgrass2010,location,-1,-1;Shape_area "Shape_area" false false true 0 Double 0 0 ,First,#,Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEDMR.EVI\GISVIEW.MEDMR.Eelgrass2010,Shape.area,-1,-1;Shape_len "Shape_len" false false true 0 Double 0 0 ,First,#,Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEDMR.EVI\GISVIEW.MEDMR.Eelgrass2010,Shape.len,-1,-1" #
Include in lineage when exporting metadata No


Process
Process name
Date 2012-07-02 13:08:23
Tool location C:\Program Files\ArcGIS\Desktop10.0\ArcToolbox\Toolboxes\Data Management Tools.tbx\ChangePrivileges
Command issued
ChangePrivileges 'Database Connections\GISVIEW.MEGIS.sde\GISVIEW.MEGIS.Eelgrass2010' public GRANT AS_IS
Include in lineage when exporting metadata No


Distribution 

Distributor
Contact information
Organization's name Maine Office of Geographic Information Systems
Contact's position GIS Coordinator
Contact's role  distributor


Contact information
Phone
Voice 207-624-7700

Address
Type postal
Delivery point State House Station #145
City Augusta
Administrative area Maine
Postal code 04333
Country USA
e-mail addressOIT.Customer-Support@maine.gov

Hours of service 9 am to 5 pm EST
Contact instructions
Monday through Friday




Fields 

Details for object GISVIEW.MEGIS.Eelgrass2010 
*Type Feature Class
*Row count 5179
Definition
polygon attribute table
Definition source
Environmental Systems Research Institute, Inc. (ESRI)


Field OBJECTID_1
 
*Alias OBJECTID_1
*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 ACRES
 
*Alias ACRES
*Data type Double
*Width 8
*Precision 19
*Scale 8
Field description
Area of polygon in acres
Description source
user calculated


Field COVER
 
*Alias COVER
*Data type Integer
*Width 4
*Precision 10
*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 1
Description gt 0% to 10% cover


Value 2
Description gt 10% to 40% cover


Value 3
Description gt 40% to 70% cover


Value 4
Description 70% to 100% cover


Value 5
Description eelgrass present but % cover not coded


Value 0
Description no eelgrass - dounut




Field HECTARES
 
*Alias HECTARES
*Data type Double
*Width 8
*Precision 19
*Scale 8
Field description
Area of polygon in hectares
Description source
user calculated


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




Field YEAR
 
*Alias YEAR
*Data type Integer
*Width 4
*Precision 10
*Scale 0
Field description
Calendar year that photography was aquired.
Description source
Date of photography
Range of values
Minimum value 0.03299
Maximum value 2497039.87500

Beginning date of values 1992
Ending date of values 2005




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 location
 
*Alias location
*Data type String
*Width 6
*Precision 0
*Scale 0
Field description
Location vertically along the shore. Intertidal locations are exposed at mean low water. This was applied only from Schoodic Point, east.
List of values
Value i
Description intertidal - exposed at mean low water


Value s
Description subtidal - below the surface of the water at mean low water




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 eelgrass05 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 2013-11-19


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


Created in ArcGIS for the item 2012-05-08 11:18:36
Last modified in ArcGIS for the item 2013-11-19 12:56:05


Automatic updates
Have been performed Yes
Last update 2013-11-19 12:48:26

Item location history
Item copied or moved 2012-05-08 11:18:36
From C:\Workspace12\Eelgrass\Eelgrass2010
To \\DMR-MRB1PCSBAR2\C$\Workspace12\Spill Response\EVI2012\Eelgrass2010


Metadata Contacts 

Metadata contact
Organization's name Maine Office of Geographic Information Systems
Contact's position GIS Coordinator
Contact's role  point of contact


Contact information
Phone
Voice 207-624-7700

Address
Type postal
Delivery point State House Station #145
City Augusta
Administrative area Maine
Postal code 04333
Country USA
e-mail addressOIT.Customer-Support@maine.gov

Hours of service 9 am to 5 pm EST
Contact instructions
Monday through Friday


Metadata Maintenance 

Maintenance
Update frequency  not planned


Thumbnail and Enclosures 

FGDC Metadata (read-only) 

Entities and Attributes 

Detailed Description
Entity Type
Entity Type LabelEelgrass2010
Entity Type Definition
polygon attribute table
Entity Type Definition SourceEnvironmental Systems Research Institute, Inc. (ESRI)

Attribute
Attribute LabelOBJECTID_1
Attribute Definition
Internal feature number.
Attribute Definition SourceESRI
Attribute Domain Values
Unrepresentable Domain
Sequential unique whole numbers that are automatically generated.

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

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 Value1
Enumerated Domain Value Definition
gt 0% to 10% cover
Enumerated Domain
Enumerated Domain Value2
Enumerated Domain Value Definition
gt 10% to 40% cover
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 Value5
Enumerated Domain Value Definition
eelgrass present but % cover not coded
Enumerated Domain
Enumerated Domain Value0
Enumerated Domain Value Definition
no eelgrass - dounut

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

Attribute
Attribute LabelOBJECTID
Attribute Definition
Recalculated prior to publication. OBJECTID = FID + 1
Attribute Definition SourceESRI
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 Minimum0.03299
Range Domain Maximum2497039.87500
Beginning Date of Attribute Values1992
Ending Date of Attribute Values2005

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

Attribute
Attribute Labellocation
Attribute Definition
Location vertically along the shore. Intertidal locations are exposed at mean low water. This was applied only from Schoodic Point, east.
Attribute Domain Values
Enumerated Domain
Enumerated Domain Valuei
Enumerated Domain Value Definition
intertidal - exposed at mean low water
Attribute Domain Values
Enumerated Domain
Enumerated Domain Values
Enumerated Domain Value Definition
subtidal - below the surface of the water at mean low water

Attribute
Attribute LabelShape.area

Attribute
Attribute LabelShape.len

Overview Description
Entity and Attribute Overview
                            eelgrass05 POLYGONS are attributed with percent of eelgrass COVER.