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Eelgrass97

SDE Feature Class

Tags
oceans, biota, environment, economy, habitat, eelgrass, submerged aquatic vegetation (SAV), fisheries


Summary

Eelgrass beds along the Maine coast are being mapped in order to better understand the present day distribution and to aid in the identification of sensitive coastal areas for protection in the case of an oil spill.

Description

eelgrass97 is a POLYGON coverage that represents Maine's eelgrass meadows, which form an important aquatic habitat for the state, suitable for mapping at 1:24,000 scale. These meadows provide shelter for juvenile fish, and invertebrates. In certain locations they also help stabilize unconsolidated sediments and shorelines. As a continuing project, sections of the coast have been flown and photographed using Kodak 2448 film at a scale of 1:12000. This photography has been supplemented in the Penobscot Bay region by 1992 flights using Kodak 2445 film. The Penobscot Bay flights were contracted by the Maine Department of Transportation and interpreted by Dr. Fred Short of University of New Hampshire. Areas in the present study were flown in the July to October period during 1993 to 1997. 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. Transparencies from the 1993-1997 flights were oriented beneath and eelgrass bed locations compiled on stable-base manuscripts containing the coastline and other basemap features from the 1:24000 scale USGS topographic maps. Polygons delineating stands of eelgrass were digitized and coded using a four category scale of percent cover. Verification has been 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, a conservative estimate of the minimum mapping unit is 150 square meters. This represents a stand of approximately 14 meters in diameter.

Credits

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  -70.886725    East  -66.974259
North  45.127637    South  43.055220

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

ArcGIS Metadata 

Topics and Keywords 

*Content type  Downloadable Data


Citation 

Title Eelgrass97


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


Citation Contacts 

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


Resource Details 

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


Status  completed
Spatial representation type* vector


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


Credits
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.Eelgrass97
*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
Extent type  Extent used for searching
*West longitude -70.886725
*East longitude -66.974259
*North latitude 45.127637
*South latitude 43.055220
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude 351587.405520
*East longitude 659354.405513
*South latitude 4768805.098233
*North latitude 4997129.431621
*Extent contains the resource Yes

Resource Maintenance 

Resource maintenance
Update frequency  not planned


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 -5120899.9999836683
Y origin -9998099.9998539891
XY scale 26581.440103034041
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.00030096187298320491
Z tolerance 2
M tolerance 2
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.Eelgrass97
*Object type  composite
*Object count 7519



ArcGIS Feature Class Properties
Feature class name GISVIEW.MEGIS.Eelgrass97
*Feature type Simple
*Geometry type Polygon
*Has topology FALSE
*Feature count 7519
*Spatial index TRUE
*Linear referencing FALSE



Distribution 

Distributor
Contact information
Organization's name Maine Office of Geographic Information Systems
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


Available format
*Name SDE Feature Class


Transfer options
Online source
*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
*Description  Downloadable Data



Distribution format
*Name SDE Feature Class


Fields 

Details for object GISVIEW.MEGIS.Eelgrass97 
*Type Feature Class
*Row count 7519
Definition
polygon feature class
Definition source
Environmental Systems Research Institute, Inc. (ESRI)


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 ACRES
 
*Alias ACRES
*Data type Double
*Width 8
*Precision 19
*Scale 8
Field description
area of mapped eelgrass meadow in acres


Field COVER
 
*Alias COVER
*Data type Double
*Width 8
*Precision 10
*Scale 0
Field description
eelgrass percent cover
Description source
User Defined
List of values
Value 0
Description no submerged aquatic vegetation (SAV)
Value 1
Description 0-10% cover (very sparse)
Value 2
Description 10-40% cover (sparse)
Value 3
Description 40-70% cover (moderate)
Value 4
Description 70-100% cover (dense)
Value 5
Description uncoded


Range of values
Minimum value 0
Maximum value 5



Field HECTARES
 
*Alias HECTARES
*Data type Double
*Width 8
*Precision 19
*Scale 8
Field description
area of mapped eelgrass meadow in hectares


Field LOCATION
 
*Alias LOCATION
*Data type String
*Width 6
*Precision 0
*Scale 0
Field description
location in relation to low water
Description source
User Defined
List of values
Value i
Description intertidal
Value s
Description subtidal
Value u
Description undetermined




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 eelgrass97 POLYGONS are attributed with percent of eelgrass COVER and LOCATION in relation to low water.


Entity and Attribute Detail Citation The ArcView shapefile and ArcGIS geodatabase formats, commonly used for Maine GIS data, carry default identifiers and attributes that are software generated and/or important for internal recordkeeping. These are listed here to avoid repetition for every layer, and may not be repeated in the attribute descriptions and definitions of each layer. Common software generated identifiers and attributes in Maine GIS data include: FID (feature identifier), Shape (feature geometry), OBJECTID and SHAPE_lengt. In addition, most GIS formats will carry fields for PERIMETER, AREA and/or LENGTH according to feature geometry. These fields are typically available by default, with the units based on coordinate system or projection units of GIS data. Most GIS software packages also provide a means to calculate these values. It is important to test any columns containing PERIMETER, AREA or LENGTH values before using them for analysis purposes. These important values can be carried from format to format and become out-dated. Verify that the values are correct. Also, in your GIS software, please view the properties of data layers for the map units used to calculate these fields, and for the units set for display purposes.




Metadata Details 

*Metadata language English (UNITED STATES)
*Metadata character set  8859part1 - Latin alphabet No. 1


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


Created in ArcGIS for the item 2011-05-10 08:12:51
Last modified in ArcGIS for the item 2013-11-19 10:19:13


Automatic updates
Have been performed Yes
Last update 2013-11-19 10:19:13


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) 

Identification 

Citation
Citation Information
OriginatorSeth Barker, Maine Department of Marine Resources (MEDMR)
Publication Date2003-07-01
Title
Eelgrass97
Geospatial Data Presentation Formvector digital data
Series Information
Series NameMaine GIS
Issue IdentificationSDE server; Internet Data Catalog
Publication Information
Publication PlaceAugusta ME
PublisherMaine Office of Geographic Information Systems (MEGIS)
Other Citation Details
1:24000
Online Linkagehttp://www.maine.gov/megis/catalog/

Description
Abstract
                            eelgrass97 is a POLYGON coverage that represents Maine's eelgrass meadows, which form an important aquatic habitat for the state, suitable for mapping at 1:24,000 scale. These meadows provide shelter for juvenile fish, and invertebrates. In certain locations they also help stabilize unconsolidated sediments and shorelines. As a continuing project, sections of the coast have been flown and photographed using Kodak 2448 film at a scale of 1:12000. This photography has been supplemented in the Penobscot Bay region by 1992 flights using Kodak 2445 film. The Penobscot Bay flights were contracted by the Maine Department of Transportation and interpreted by Dr. Fred Short of University of New Hampshire. Areas in the present study were flown in the July to October period during 1993 to 1997. 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. Transparencies from the 1993-1997 flights were oriented beneath and eelgrass bed locations compiled on stable-base manuscripts containing the coastline and other basemap features from the 1:24000 scale USGS topographic maps. Polygons delineating stands of eelgrass were digitized and coded using a four category scale of percent cover. Verification has been 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, a conservative estimate of the minimum mapping unit is 150 square meters. This represents a stand of approximately 14 meters in diameter.
                          
Purpose
                            Eelgrass beds along the Maine coast are being mapped in order to better understand the present day distribution and to aid in the identification of sensitive coastal areas for protection in the case of an oil spill.
                          
Time Period of Content
Time Period Information
Range of Dates/Times
Beginning Date1992
Ending Date1997
Currentness Reference
                            publication date
                          
Status
ProgressComplete
Maintenance and Update FrequencyNone planned

Spatial Domain
Bounding Coordinates
West Bounding Coordinate-70.8225
East Bounding Coordinate-66.97426
North Bounding Coordinate45.10967
South Bounding Coordinate43.05744

Keywords
Theme
Theme Keyword ThesaurusISO Keyword Thesaurus
Theme Keywordoceans
Theme Keywordbiota
Theme Keywordenvironment
Theme Keywordeconomy

Theme
Theme Keyword ThesaurusMaine GIS Thesaurus-Theme
Theme Keywordhabitat
Theme Keywordeelgrass
Theme Keywordsubmerged aquatic vegetation (SAV)
Theme Keywordfisheries

Place
Place Keyword ThesaurusMaine GIS Thesaurus-Place
Place KeywordMaine
Place KeywordUnited States
Place KeywordGulf of Maine

Stratum
Stratum Keyword ThesaurusGCMD Parameter Keyword
Stratum Keywordbiosphere
Stratum Keywordoceans

Access Constraints
                        REQUIRED: Restrictions and legal prerequisites for accessing the data set.
                      
Use Constraints
                        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.
                      
Point of Contact
Contact Information
Contact Organization Primary
Contact Organization(MEDMR) Maine Department of Marine Resources
Contact PersonSeth Barker
Contact PositionGIS Specialist
Contact Address
Address Typemailing address
AddressPO Box 8
CityWest Boothbay Harbor
State or ProvinceME
Postal Code04575
CountryUNITED STATES

Contact Voice Telephone(207) 633-9507
Contact Facsimile Telephone(207) 633-9579
Contact Electronic Mail Addressseth.barker@maine.gov
Hours of ServiceMonday through Friday 0800 - 1700 EST

Data Set Credit
                        Credit should always be given to the data source and/or originator when the data is transferred or printed.
                      
Native Data Set Environment
(MEDMR) Maine Department of Marine Resources; Maine Office of Information Technology (OIT) Oracle 9i, Maine Office of Geographic Information Systems (MEGIS), Maine GIS SDE, Maine GIS Internet Data Catalog http://megis.maine.gov/catalog/

Data Quality 

Attribute Accuracy
Attribute Accuracy Report
                            Thematic accuracy was checked using GPS controlled navigation to representative areas of the coastline. The vector polygon data was loaded into a field PC and displayed in ArcView software. A tracking software allowed the analyst to travel to specific points in the data with precision and to check the type of habitat in the field. Sample sites were selected based on their location and distribution along the coast. No empirical accuracy statistics were  generated. Proof plots were checked against original manuscripts
                          
Logical Consistency Report
                        Following interpretation and digitization, an Arc/Info format polygon coverage was BUILT. An editing process was also conducted to ensure proper closure and labeling.
                      
Completeness Report
                        All eelgrass beds interpretable from aerial photography were mapped.
                      
Positional Accuracy
Horizontal Positional Accuracy
Horizontal Positional Accuracy Report
                                Approximate horizontal accuracy is 12 meters, assuming source data meets National Map Accuracy Standards.
                              
Quantitative Horizontal Positional Accuracy Assessment
Horizontal Positional Accuracy Value12
Horizontal Positional Accuracy Explanation
                                    Compilation base data meets National Map Accuracy Standards for 1:24,000 scale.
                                  
Lineage
Source Information
Source Citation
Citation Information
OriginatorMaine Department of Transportation (MEDOT), Dr. Fred Short Univeristy of New Hampshire (UNH) (ed.), Seth Barker Maine Department of Marine Resources (MEDMR) (comp.)
Title
(KODAK2445)MEGRASSPHOTOS
Geospatial Data Presentation Formremote-sensing image
Series Information
Series NameEelgrass Mapping Project
Issue IdentificationPhotography Penobscot Bay
Publication Information
Publication PlaceAugusta ME
PublisherMaine Office of Geographic Information Systems (MEGIS)

Source Scale Denominator12000
Type of Source Mediafilmstrip
Source Time Period of Content
Time Period Information
Single Date/Time
Calendar Date1992
Time of Dayunknown
Source Currentness Reference
ground condition
Source Citation Abbreviation
kodak2445
Source Contribution
                                Eelgrass photography has been supplemented in the Penobscot Bay region by 1992 flights using Kodak 2445 film. The Penobscot Bay flights were contracted for by the MEDOT and interpreted by Dr. Fred Short of UNH.
                              
Source Information
Source Citation
Citation Information
OriginatorSeth Barker Maine Department of Marine Resources (MEDMR)
Title
(KODAK2448)MEGRASSPHOTOS
Geospatial Data Presentation Formremote-sensing image
Series Information
Series NameEelgrass Mapping Project
Issue IdentificationPhotography
Publication Information
Publication PlaceAugusta ME
PublisherMaine Office of Geographic Information Systems (MEGIS)

Source Scale Denominator12000
Type of Source Mediafilmstrip
Source Time Period of Content
Time Period Information
Range of Dates/Times
Beginning Date1993
Beginning TimeUnknown
Ending Date1997
Ending TimeUnknown
Source Currentness Reference
ground condition
Source Citation Abbreviation
kodak2448
Source Contribution
                                As a continuing eelgrass mapping project, sections of the coast have been flown and photographed using Kodak 2448 film at a scale of 1:12000.
                              
Source Information
Source Citation
Citation Information
OriginatorU.S. Geological Survey (USGS)
Publication Datemultiple dates
Publication TimeUnknown
Title
(24k) USGS 1:24,000 scale quadrangles
Geospatial Data Presentation Formmap
Series Information
Series NameNational Mapping Program Standard Series Topographic Maps
Issue IdentificationUSGS 7.5 Minute Map Series
Publication Information
Publication PlaceReston VA
PublisherU.S. Geological Survey
Other Citation Details
24000 Publication date is unique to each quadrangle in the map series. Standard 7.5x7.5 minute quadrangles cover geographic areas of 49 to 71 square miles. 1 inch at map scale represents 2000 feet.
Online Linkagehttp://mapping.usgs.gov/mac/maplists/howtoselectmaps.html

Source Scale Denominator24000
Type of Source Mediastable-base material (mylar)
Source Time Period of Content
Time Period Information
Range of Dates/Times
Beginning Date1948-01-01
Beginning TimeUnknown
Ending DatePresent
Ending TimeUnknown
Source Currentness Reference
publication date
Source Citation Abbreviation
24k
Source Contribution
                                Eelgrass bed locations were compiled on stable-base manuscripts containing the coastline and other basemap features from the 24k USGS topographic maps.
                              
Process Step
Process Description
                                Photo-Interpretation-  Duplicated film diapositives were interpreted monoscopically on a large-format light table.  Submerged aquatic vegetation (SAV) habitat was annotated on acetate overlays attached to the film. The habitat was assigned to one (1) of four (4) density classes based on percent ground coverage by actual eelgrass. The photography was interpreted by a skilled analyst  very familiar with the local environment.  GPS controlled field work was used to develop signatures suitable for mapping.
                              
Process Date1997


Process Contact
Contact Information
Contact Organization Primary
Contact Organization(MEDMR) Maine Department of Marine Resources
Contact PositionGIS Specialist
Contact Address
Address Typemailing address
AddressPO Box 8
CityWest Boothbay Harbor
State or ProvinceME
Postal Code04575
CountryUNITED STATES

Contact Voice Telephone(207) 633-9507
Contact Facsimile Telephone(207) 633-9579
Hours of ServiceMonday through Friday 0800 - 1700 EST

Process Step
Process Description
                                Data Vectorization- At the conclusion of the interpretation process, the diapositives with overlays attached were placed on the light table below mylar USGS 7.5 minute quads.  The photos were manually fitted to the USGS map and the habitat polygons were transferred to the quad mylars.  The annotated mylar was scanned and an automated vectorization software was used to capture the linework as  ESRI vectors.  These vectors were manually edited and a polygon coverage was built using ArcInfo software.  The polygon coverage was then attributed according to the four SAV density classes.
                              
Process Date1997


Process Contact
Contact Information
Contact Organization Primary
Contact Organization(MEDMR) Maine Department of Marine Resources
Contact PositionGIS Specialist
Contact Address
Address Typemailing address
AddressPO Box 8
CityWest Boothbay Harbor
State or ProvinceME
Postal Code04575
CountryUNITED STATES

Contact Voice Telephone(207) 633-9507
Contact Facsimile Telephone(207) 633-9579
Hours of ServiceMonday through Friday 0800 - 1700 EST

Process Step
Process Description
                                Aerial Photography Acquisition- Conventional color (Kodak Aerochrome 2448) film was acquired over the Maine coast at a nominal scale of 1:12,000. The coast was flown in an incremental fashion in 1993, 1994, 1995, 1996, and 1997. The film was flown according to the environmental parameters recommended in the C-CAP protocol. The mission specifications included 60% endlap and 30% sidelap for adjacent lines. A 153mm color-corrected lens and Wild RC10 camera were used to collect the imagery.
                              
Process Date1997


Process Contact
Contact Information
Contact Organization Primary
Contact Organization(MEDMR) Maine Department of Marine Resources
Contact PositionGIS Specialist
Contact Address
Address Typemailing address
AddressPO Box 8
CityWest Boothbay Harbor
State or ProvinceME
Postal Code04575
CountryUNITED STATES

Contact Voice Telephone(207) 633-9507
Contact Facsimile Telephone(207) 633-9579
Hours of ServiceMonday through Friday 0800 - 1700 EST

Process Step
Process Description
                                Metadata imported.
                              
Source Used Citation Abbreviation
U:\projects\metadata\updated\datasets\eelgrass97.xml


Process Step
Process Description
                                Dataset copied.
                              
Source Used Citation Abbreviation
Server=gisdatabase; Service=esri_vector; User=sdeuser; Version=SDE.DEFAULT
Process Date2011-05-10
Process Time08:12:51


Cloud Cover0


Spatial Reference 

Horizontal Coordinate System Definition
Planar
Planar Coordinate Information
Planar Coordinate Encoding MethodCoordinate Pair
Coordinate Representation
Abscissa Resolution1
Ordinate Resolution1
Planar Distance Unitsmeters

Geodetic Model
Horizontal Datum NameNorth American Datum of 1983
Ellipsoid NameGeodetic Reference System 80
Semi-major Axis6378137
Denominator of Flattening Ratio298.257

Vertical Coordinate System Definition
Altitude System Definition
Altitude Resolution1.000000
Altitude Encoding MethodExplicit elevation coordinate included with horizontal coordinates

Entities and Attributes 

Detailed Description
Entity Type
Entity Type Labeleelgrass97
Entity Type Definition
polygon feature class
Entity Type Definition SourceEnvironmental Systems Research Institute, Inc. (ESRI)

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 LabelACRES
Attribute Definition
area of mapped eelgrass meadow in acres

Attribute
Attribute LabelCOVER
Attribute Definition
eelgrass percent cover
Attribute Definition SourceUser Defined
Attribute Domain Values
Enumerated Domain
Enumerated Domain Value0
Enumerated Domain Value1
Enumerated Domain Value2
Enumerated Domain Value3
Enumerated Domain Value4
Enumerated Domain Value5
Enumerated Domain Value Definition
no submerged aquatic vegetation (SAV)
Enumerated Domain Value Definition
0-10% cover (very sparse)
Enumerated Domain Value Definition
10-40% cover (sparse)
Enumerated Domain Value Definition
40-70% cover (moderate)
Enumerated Domain Value Definition
70-100% cover (dense)
Enumerated Domain Value Definition
uncoded
Range Domain
Range Domain Minimum0
Range Domain Maximum5

Attribute
Attribute LabelHECTARES
Attribute Definition
area of mapped eelgrass meadow in hectares

Attribute
Attribute LabelLOCATION
Attribute Definition
location in relation to low water
Attribute Definition SourceUser Defined
Attribute Domain Values
Enumerated Domain
Enumerated Domain Valuei
Enumerated Domain Values
Enumerated Domain Valueu
Enumerated Domain Value Definition
intertidal
Enumerated Domain Value Definition
subtidal
Enumerated Domain Value Definition
undetermined

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
                            eelgrass97 POLYGONS are attributed with percent of eelgrass COVER and LOCATION in relation to low water.
                          
Entity and Attribute Detail Citation
                            The  ArcView shapefile and ArcGIS geodatabase formats, commonly used for Maine GIS data, carry default identifiers and attributes that are software generated and/or important for internal recordkeeping. These are listed here to avoid repetition for every layer, and may not be repeated in the attribute descriptions and definitions of each layer. Common software generated identifiers and attributes in Maine GIS data include: FID (feature identifier), Shape (feature geometry), OBJECTID and SHAPE_lengt.  In addition, most GIS formats will carry fields for PERIMETER, AREA and/or LENGTH according to feature geometry. These fields are typically available by default, with the units based on coordinate system or projection units of GIS data. Most GIS software packages also provide a means to calculate these values. It is important to test any columns containing PERIMETER, AREA or LENGTH values before using them for analysis purposes. These important values can be carried from format to format and become out-dated. Verify that the values are correct. Also, in your GIS software, please view the properties of data layers for the map units used to calculate these fields, and for the units set for display purposes.
                          

Distribution Information 1 

Distributor
Contact Information
Contact Organization Primary
Contact Organization(MEGIS) Maine Office of Geographic Information Systems
Contact PersonGIS Coordinator
Contact PositionGIS Coordinator
Contact Address
Address Typemailing address
AddressState House Station 174
CityAugusta
State or ProvinceME
Postal Code04333-0174
CountryUNITED STATES

Contact Voice Telephone207 624-7700
Contact Facsimile Telephone207 287-3842
Hours of ServiceMonday through Friday 0800 - 1700 EST

Resource Descriptionhttp://megis.maine.gov/catalog/
Distribution Liability
                        Users must assume responsibility to determine the usability of this data for their purposes. Although these data have been processed successfully on a computer system at the Maine Office of Geographic Information Systems, no warranty expressed or implied is made by MEGIS regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. Neither the Maine Office of Geographic Information Systems, nor any of its contributors, is liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets.
                      
Standard Order Process
Digital Form
Digital Transfer Information
Format NameESRI Shapefile
Format Version NumberARC Version 9.x
Format Specification
ArcView Shapefile Format
Format Information Content
MEGIS has made all vector layers, in the Maine GIS Internet Data Catalog, available in ESRI's ArcView shapefile format. A shapefile is a simple non-topological format that stores the geometry and attribute information for a set of geographic features as a set of vector (point, line, polygon) coordinates. Shapefiles draw quickly and directly in ArcView, ArcGIS, ArcExplorer. Shapefiles are a compatible data type for many other types of GIS software. Three files are fundamental to each shapefile: .shp stores the feature geometry (shape and location information); .shx stores the index of the feature geometry; .dbf a dBASE (TM) file stores the attribute information for the features. Other index files may be created to help speed analysis and query: these file formats are .sbn .sbx .ain .aix .fbn and .fbx. In addition you may find projection .prj, and metadata .xml, files associated with shapefiles.
File Decompression TechniqueData available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/.

Digital Transfer Option
Online Option
Computer Contact Information
Network Address
Network Resource Namehttp://megis.maine.gov/catalog/

Access Instructions
                                        These data are available to Internet browsers for download from the Maine GIS Internet Data Catalog - http://megis.maine.gov/catalog/


Data available from this website is in .zip compressed format. WinZip is a Windows based, PKZip-compatible compression utility. You will need a program like this to extract the data. A link to a trial copy WinZip software is available at http://megis.maine.gov/links/

If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI) - www.esri.com

See http://megis.maine.gov/links/ for a link to ArcExplorer 9.x .
                                      
FeesData may be downloaded from Maine GIS Internet Data Catalog at no charge.
TurnaroundData is available for immediate download from the Maine GIS Internet Data Catalog.


Technical Prerequisites
If you are not already a GIS user, free software for viewing these files is available from Environmental Systems Research Institute, Inc. (ESRI) http://www.esri.com/ You may also see http://megis.maine.gov/links/ for a link to ArcExplorer 9.x


Distribution Information 2 

Distributor
Contact Information
Contact Organization Primary
Contact OrganizationMaine Office of Geographic Information Systems
Contact PositionGIS Coordinator
Contact Address
Address Typemailing address
AddressState House Station 174
CityAugusta
State or ProvinceME
Postal Code04333-0174
CountryUNITED STATES

Contact Voice Telephone(207) 624-7700
Contact Facsimile Telephone(207) 287-3842
Hours of ServiceMonday through Friday 0800 - 1700 EST

Distribution Liability
                        Users must assume responsibility to determine the usability of this data for their purposes.
                      
Standard Order Process
Digital Form
Digital Transfer Information
Format NameARCSDE
Format Version NumberArcSDE 9.x
Format Information Content
Oracle 9i

Digital Transfer Option
Online Option
Access Instructions
                                        Please contact the Maine Office of GIS (MEGIS) for access instructions.
                                      
FeesAccess is available through Maine's wide area network; WAN users may contact the Maine Office of Information Technology, Maine Office of Geographic Information Systems (MEGIS) for a login.


Metadata Reference 

Metadata Date1999-05-11
Metadata Review Date2010-01-14
Metadata Contact
Contact Information
Contact Organization Primary
Contact Organization(MEDMR) Maine Department of Marine Resources
Contact PersonREQUIRED: The person responsible for the metadata information.
Contact PositionGIS Specialist
Contact Address
Address Typemailing address
AddressPO Box 8
CityWest Boothbay Harbor
State or ProvinceME
Postal Code04575
CountryUNITED STATES

Contact Voice Telephone(207) 633-9507
Contact Facsimile Telephone(207) 633-9579
Hours of ServiceMonday through Friday 0800 - 1700 EST

Metadata Standard NameFGDC CSDGM
Metadata Standard VersionFGDC-STD-001-1998
Metadata Time Conventionlocal time


Metadata Access Constraintsnone
Metadata Use Constraints
none