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Molluscan Shellfish

FGDC XML
Identification Information
Citation Information
Originator Maine Department of Marine Resources (MEDMR)
Publication Date 20101012
Title Molluscan Shellfish
Geospatial Data Presentation Form vector digital data
Series Name Maine GIS Data Catalog
Publication Place Augusta ME
Publisher Maine Office of Geographic Information Systems (MEGIS)
Online Linkage http://megis.maine.gov/catalog/
Abstract Molluscan Shellfish are polygon datasets that contain distribution information for the molluscan shellfish species; sea scallop (Placopectin magellanicus), american oysters (Crassostrea virginica), atlantic surf clams (Spisula solidissima), blue mussels (Mytilus edulis), european oysters (Ostrea edulis), hard clams (Mercenaria mercenaria), razor clam (Ensis directus) and softshell clams (Mya arenaria) for the coast of Maine . Polygons are based on locations indicated by town officials, harvesters, Harbormasters, MEDMR biologists, MEDMR specialists, MEDMR Marine Patrol officers or MEDMR scientists from February 2008 to September 2010. POLYGON codes include: Town, County, Species, NOAA_Chart, Updated, Acres and Source. A COMMENT field indicates sea scallop locations obtained from MEDMR sea scallop tow survey data generated during 2005 - 2009.
Purpose Though primarily based on harvestable locations, shellfish species distributions are helpful tools for planning activities. Baseline data of shellfish species distributions in Maine provides a foundation for future data updates. Data at this scale is suitable for use in generalized studies and local planning.
Supplemental Information These layers may not be current or complete, as shellfish distributions could change over time and portions of the Maine coast may not have been included.
Time Period of Content
Calendar Date 2010/10/12
Currentness Reference publication date
Status
Progress Complete
Maintenance and Update Frequency Irregular
Bounding Coordinates
West Bounding Coordinate -70.866830
East Bounding Coordinate -68.662213
North Bounding Coordinate 44.396135
South Bounding Coordinate 43.096281
Keywords
Theme marine environment monitoring, marine biology, molluscan, shellfish, commodities, coastal, biology, 40000, sea scallop, blue mussel, razor clam, hard clam, european oyster, atlantic surf, american oyster, molluscan shellfish, softshell clam, aquaculture, aquatic habitat, habitat, Crassastrea virginica, Ensis directus, Mercenaria mercenaria, Mya arenaria, Mytilus edulis, Ostrea edulis, Placopectin magellanicus, Spisula solidissima (Maine GIS Thesaurus-Theme)
Place Maine, Gulf of Maine (Maine GIS Thesaurus-Place)
Stratum biosphere, oceans (Maine GIS Thesaurus-Stratum)
Access Constraints Secondary distribution by permission only. Please see Maine Office of Geographic Information Systems (MEGIS) license agreement at <http://megis.maine.gov/>. Any secondary distribution must have this documentation appended.
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 most recent copy of both data and metadata from the Maine GIS Data Catalog.
Contact Person Michelle Mason Webber
Contact Organization (MEDMR) Maine Department of Marine Resources
Contact Position Shellfish Program Coordinator
Address Type mailing address
Address 21 State House Station
City Augusta
State or Province ME
Postal Code 04333
Country USA
Contact Voice Telephone 207 624 6570
Contact Facsimile Telephone 207 624-6015
Contact Electronic Mail Address michelle.mason@maine.gov
Hours of Service Monday through Friday 0700 - 1600 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 Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850
Attribute Accuracy Report Fields named: Town, County, Species, NOAA_Chart, Updated, Shape, and Source have been maintained and are complete. Other fields may not be complete.
Logical Consistency Report molluscan shellfish is a polygon dataset that provides distribution information for molluscan shellfish for the coast of Maine.
Completeness Report The dataset is updated on an irregular schedule.
Horizontal Positional Accuracy Report The data were compiled on a 1:40000 scale base with a horizontal accuracy +/- 70 feet or 20 meters (based on National Map Accuracy Standards). Polygons are based on locations indicated by town officials, harvesters, Harbormasters, DMR biologists, DMR specialists, DMR Marine Patrol officers or DMR scientists from February 2008 to September 2010.
Citation Information
Originator Local knowledge from Maine coastal town officials
Publication Date Unpublished Material
Title MEDMR local knowledge
Geospatial Data Presentation Form paper
Other Citation Details Multiple NOAA raster charts were used in this project. Attribute field "NOAA_Chart" provides the specific chart title associated with specific polygons. Chart scales used in the project range from 1:80000 to 1:20000
Beginning Date 20080219
Beginning Time unknown
Ending Date 20101012
Ending Time unknown
Source Citation Abbreviation medmr_loc_knwlg
Source Contribution Local knowledge of molluscan shellfish species locations along the Maine coast
Citation Information
Originator Maine Office of Geographic Information Systems (MEGIS)
Publication Date 20070701
Publication Time Unknown
Title metwp24
Geospatial Data Presentation Form vector digital data
Series Name Maine GIS
Issue Identification SDE server; Internet Data Catalog
Publication Place Augusta ME
Publisher Maine Office of Geographic Information Systems
Other Citation Details 1:24000
Online Linkage http://megis.maine.gov/catalog/
Source Scale Denominator 24000
Type of Source Media online
Beginning Date 19480101
Beginning Time unknown
Ending Date 20050822
Ending Time unknown
Source Currentness Reference source dates
Source Citation Abbreviation metwp24
Citation Information
Originator (NOAA) National Oceanic and Atmospheric Administration
Publication Date multiple dates
Title NOAA_RNC
Geospatial Data Presentation Form raster digital data
Series Name Raster Navigational Charts: NOAA RNC's
Publication Place Silver Springs, MD
Publisher National Ocean Service-Office of Coast Survey
Other Citation Details Multiple NOAA raster charts were used in this project. Attribute field "NOAA_Chart" provides the specific chart title associated with specific polygons. Chart scales used in the project range from 1:80000 to 1:20000
Online Linkage http://www.nauticalcharts.noaa.gov/staff/charts.htm#RNC
Type of Source Media raster digital data
Time of Day unknown
Source Currentness Reference publication date
Source Citation Abbreviation noaa_rnc
Source Contribution Base information to which shellfish polygons were referenced.
Process Description Sea scallop tow survey data insertion- Sea scallop tow survey data for years 2005 through 2009 were extracted from the MEDMR's MARVIN database, and placed into a Microsoft Excel spreadsheet format. This spreadsheet was converted into a Microsoft Access database file, and imported into the ArcGIS project file. The X -Y coordinates were plotted in ArcMap, using geographic coordinate system "North American Datum 1983". Polygons were drawn around points containing reported quantities of at least one sea scallop. There were two points in the 2005 sea scallop data that were located over a land mass: they contained reported quantities of zero scallops, and they were excluded from the sea scallop shapefile. There were two points in the 2006 sea scallop data that were south of Mount Desert Island. Since there was no reference town in the "towns-24K" file to correspond to these points, they were excluded from the sea scallop shapefile. There were many points in the 2009 sea scallop data that were outside of the three-mile limit of state jurisdiction; since there was no reference town in the "towns-24K" file to correspond to these points, they were excluded from the sea scallop shapefile.
Process Date 2010/07/10
Contact Person Michelle Mason Webber
Contact Organization (MEDMR) Maine Department of Marine Resources
Contact Position Shellfish Program Coordinator
Address Type mailing address
Address 21 State House Station
City Augusta
State or Province ME
Postal Code 04333
Country USA
Contact Voice Telephone 207 624 6570
Contact Facsimile Telephone 207 624-6015
Contact Electronic Mail Address michelle.mason@maine.gov
Hours of Service Monday through Friday 0700 - 1600 EST
Process Description Map construction- Series of paper maps were created for each coastal town, depicting the nearshore coastline. These maps were created using electronic National Oceanic and Atmospheric Administration (NOAA) charts in ArcMap 9.2, which were then converted to .PDF documents. Landmarks were used as reference points from one map to the next, so participants could stay oriented throughout the map series.
Process Date 2009/05
Contact Person Michelle Mason Webber
Contact Organization (MEDMR) Maine Department of Marine Resources
Contact Position Shellfish Program Coordinator
Address Type mailing address
Address 21 State House Station
City Augusta
State or Province ME
Postal Code 04333
Country USA
Contact Voice Telephone 207 624 6570
Contact Facsimile Telephone 207 624-6015
Contact Electronic Mail Address michelle.mason@maine.gov
Hours of Service Monday through Friday 0700 - 1600 EST
Process Description Data collection- Paper map series were sent to town officials, harvesters, Harbormasters, MEDMR specialists, MEDMR scientists and MEDMR biologists. All recipients were asked to mark molluscan shellfish resource locations, observed within the last two to three years, on the maps. They could use a different pen color for each species, or write the species name in the marked areas. They were asked to send the maps back to the project manager. Two people chose to mark resources on paper NOAA charts, which were returned to the project manager. Some people marked only commercially viable shellfish locations, and other people marked all observed locations of shellfish resources. The project manager met in person with MEDMR Marine Patrol officers: the officers marked paper NOAA charts with shellfish locations.
Process Date 2010/09
Contact Person Michelle Mason Webber
Contact Organization (MEDMR) Maine Department of Marine Resources
Contact Position Shellfish Program Coordinator
Address Type mailing address
Address 21 State House Station
City Augusta
State or Province ME
Postal Code 04333
Country USA
Contact Voice Telephone 207 624 6570
Contact Facsimile Telephone 207 624-6015
Contact Electronic Mail Address michelle.mason@maine.gov
Hours of Service Monday through Friday 0700 - 1600 EST
Process Description Digitization of data- marked maps and charts were scanned into Adobe Acrobat 6.0 Professional, and a .PDF document was created. The .PDF documents were georeferenced to the appropriate electronic NOAA chart, and polygons were created to encompass each marked location of molluscan shellfish. Where multiple sources indicated a specific location, the most "hands-on" source category was used as the source. Some polygons are composites from several sources, and show the largest boundary indicated by the multiple sources. Shellfish polygons that were confirmed by MEDMR Marine Patrol officers, and those polygons that were significantly modified by an officer's knowledge, were credited in the attribute tables as being sourced from the Marine Patrol.
Process Date 2010/09
Contact Person Michelle Mason Webber
Contact Organization (MEDMR) Maine Department of Marine Resources
Contact Position Shellfish Program Coordinator
Address Type mailing address
Address 21 State House Station
City Augusta
State or Province ME
Postal Code 04333
Country USA
Contact Voice Telephone 207 624 6570
Contact Facsimile Telephone 207 624-6015
Contact Electronic Mail Address michelle.mason@maine.gov
Hours of Service Monday through Friday 0700 - 1600 EST
Process Description Data review- Michelle Mason Webber fixed town coding errors, overlapping polygons and irregular polygon boundaries. Seth Barker created a geodatabase, and applied topology to the shellfish layers
Process Date 2010/10
Contact Organization (MEDMR) Maine Department of Marine Resources
Contact Person Seth Barker
Contact Position GIS Specialist
Address Type mailing address
Address PO Box 8
City West Boothbay Harbor
State or Province ME
Postal Code 04575
Country USA
Contact Voice Telephone (207) 633-9507
Contact Facsimile Telephone (207) 633-9579
Contact Electronic Mail Address seth.barker@maine.gov
Hours of Service Monday through Friday 0800 - 1700 EST
Process Description Dataset copied.
Source Used Citation Abbreviation C:\Documents and Settings\michelle.mason\My Documents\GIS stuff\Data\Phase II shape files\Shape files from MEGIS website\molluscan_shellfish
Process Description Dataset copied.
Source Used Citation Abbreviation C:\Documents and Settings\Michelle.Mason\My Documents\GIS stuff\Data\Phase II shape files\molluscan_shellfish_phaseII
Process Date 20101206
Process Time 09361500
Process Description Metadata imported.
Source Used Citation Abbreviation Z:\allshare\Michelle\Shape files\Phase II shape files\molluscan_shellfish_phaseII.xml
Process Date 20101213
Process Time 14100400
Cloud Cover 0
Direct Spatial Reference Method Vector
SDTS Point and Vector Object Type G-polygon
Point and Vector Object Count 0
Grid Coordinate System Name Universal Transverse Mercator
UTM Zone Number 19
Scale Factor at Central Meridian 0.999600
Longitude of Central Meridian -69.000000
Latitude of Projection Origin 0.000000
False Easting 500000.000000
False Northing 0.000000
Planar Coordinate Encoding Method coordinate pair
Abscissa Resolution 0.000100
Ordinate Resolution 0.000100
Planar Distance Units meters
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
Altitude Resolution 1.000000
Altitude Encoding Method Explicit elevation coordinate included with horizontal coordinates
Entity Type Label MEDMR.American_oysters_phaseII
Entity Type Definition polygon attribute table
Entity Type Definition Source Environmental Systems Research Institute, Inc. (ESRI)
Attribute Label OBJECTID_1
Attribute Definition Internal feature number.
Attribute Definition Source ESRI
Unrepresentable Domain Sequential unique whole numbers that are automatically generated.
Beginning Date of Attribute Values 
Attribute Label COUNTY
Attribute Definition County name
Attribute Definition Source The name of the county in which the selected feature's town is located. The county was determined using DeLorme's "Maine Atlas and Gazetteer" county map
Beginning Date of Attribute Values 
Attribute Label NOAA_CHART
Attribute Definition Chart number of basemap
Attribute Definition Source Electronic NOAA chart that contains the feature. Scales vary from 1:20,000 to 1:80,000
Beginning Date of Attribute Values 
Attribute Label OBJECTID
Attribute Definition Internal feature number.
Attribute Definition Source ESRI
Unrepresentable Domain Sequential unique whole numbers that are automatically generated.
Beginning Date of Attribute Values 
Attribute Label SHAPE
Attribute Definition Feature geometry.
Attribute Definition Source ESRI
Unrepresentable Domain Coordinates defining the features.
Beginning Date of Attribute Values 
Attribute Label SOURCE
Attribute Definition Contributor
Attribute Definition Source The source of first-hand knowledge of the location of the feature. The catagories of sources include: town officials, harvesters, Harbormasters, MEDMR biologists, MEDMR Marine Patrol officers, MEDMR specialists or MEDMR scientists. Where two sources indicated the same feature location, the most "hands-on" source category was listed as the source. Some features are composites from several sources, and show the most extensive boundary indicated by the multiple sources
Beginning Date of Attribute Values 
Attribute Label SPECIES
Attribute Definition Species common name
Attribute Definition Source The name given to the molluscan bivalve species in the public realm
Beginning Date of Attribute Values 
Attribute Label TOWN
Attribute Definition Town name
Attribute Definition Source The identity of the town was derived from MEDMR shapefile "towns-24k". Town boundaries were determined using shapefile "metwp24" from the MEGIS data catalog
Beginning Date of Attribute Values 
Attribute Label UPDATED
Attribute Definition The date the feature's boundaries or attributes were last changed
Beginning Date of Attribute Values 
Attribute Label ACRES2
Attribute Definition Polygon area in acres
Attribute Definition Source ESRI
Beginning Date of Attribute Values 
Attribute Label SHAPE.AREA
Attribute Definition Area of the polygon in square meters
Attribute Definition Source ESRI
Beginning Date of Attribute Values 
Attribute Label SHAPE.LEN
Attribute Definition Perimeter of the polygon in meters
Attribute Definition Source ESRI
Beginning Date of Attribute Values 
Contact Organization (MEGIS) Maine Office of Geographic Information Systems
Contact Position GIS Coordinator
Address Type mailing address
Address State House Station 145
City Augusta
State or Province ME
Postal Code 04333-0145
Country USA
Contact Voice Telephone (207) 624-7700
Contact Facsimile Telephone (207) 287-3842
Hours of Service Monday through Friday 0800 - 1700 EST
Resource Description Downloadable Data
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.
Format Name ESRI Shapefile
Format Version Number ARC 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 Technique 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/.
Transfer Size 0.025
[accinstr]  These data are available to Internet browsers for download from the Maine GIS Internet Data 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). See http://megis.maine.gov/links/ for a link to ArcExplorer 9.x .
Fees Data may be downloaded from Maine GIS Internet Data Catalog at no charge.
Turnaround Data is available for immediate download from the Maine GIS Internet Data Catalog.
Contact Organization (MEGIS) Maine Office of Geographic Information Systems
Contact Position GIS Coordinator
Address Type mailing address
Address State House Station 145
City Augusta
State or Province ME
Postal Code 04333-0145
Country USA
Contact Voice Telephone (207) 624-7700
Contact Facsimile Telephone (207) 287-3842
Hours of Service Monday through Friday 0800 - 1700 EST
Distribution Liability Users must assume responsibility to determine the usability of this data for their purposes.
Format Name ARCSDE
Format Version Number ArcSDE 9.x
Format Information Content Oracle 9i
Transfer Size 0.025
[accinstr]  Please contact the Maine Office of GIS (MEGIS) for access instructions.
Fees Access 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 Information
Metadata Date 20110106
Metadata Contact
Contact Person Michelle Mason Webber
Contact Organization (MEDMR) Maine Department of Marine Resources
Contact Position Shellfish Program Coordinator
Address Type mailing address
Address 21 State House Station
City Augusta
State or Province ME
Postal Code 04333
Country USA
Contact Voice Telephone 207 624 6570
Contact Facsimile Telephone 207 624-6015
Contact Electronic Mail Address michelle.mason@maine.gov
Hours of Service Monday through Friday 0700 - 1600 EST
Metadata Standard Name FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version FGDC-STD-001-1998
Metadata Time Convention local time
Metadata Access Constraints none
Metadata Use Constraints none
Online Linkage http://www.esri.com/metadata/esriprof80.html
Profile Name ESRI Metadata Profile
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