aquifer_contacts

Citation:

Citation Information:

Originator: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)
Publication Date: 2/5/2009
Title: aquifer_contacts
Geospatial Data Presentation Form: vector digital data
Series Information:

Series Name: Significant aquifer maps
Issue Identification: Printed map citation for individual quadrangles listed in the author, pubdate, title, and source fields in associated attribute table.

Publication Information:

Publication Place: Augusta ME
Publisher: Maine Office of Geographic Information Systems (MEGIS)

Other Citation Details: Full citation for significant aquifer contacts includes the author, pubdate, title, and source fields in the associated attribute table.
Online Linkage: http://megis.maine.gov/catalog/

Description:

Abstract:
AQUIFER_CONTACTS contains contacts of significant aquifers (glacial deposits that are a significant ground water resource) for Maine mapped at a scale 1:24,000, from the Department of Conservation, Maine Geological Survey. Printed maps published by the Maine Geological Survey on USGS 7.5' quadrangle bases. Aquifer boundaries delineated and digitized by the Maine Geological Survey from data compiled on USGS 7.5' quadrangle bases. Contacts coded by source (derived from political boundary; derived from USGS 7.5' quadrangle boundary; derived from water body; mapped and digitized) and accuracy of mapped and digitized contact (solid or dashed).
See aquifer_polygon data set for aquifer polygon characteristics.

Purpose: Delineate glacial deposits that may be a significant ground water resource for water resources evaluation and ground water protection.

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 1948
Beginning Time: Unknown
Ending Date: 2009
Ending Time: Unknown

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: Irregular

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -71.260767
East Bounding Coordinate: -66.766774
North Bounding Coordinate: 47.50065
South Bounding Coordinate: 42.908008

Keywords:

Theme:

Theme Keyword Thesaurus: Maine GIS Thesaurus - Theme
Theme Keyword: geology
Theme Keyword: hydrogeology
Theme Keyword: surficial deposits
Theme Keyword: sand and gravel
Theme Keyword: ground water
Theme Keyword: aquifers
Theme Keyword: 24000

Theme:

Theme Keyword Thesaurus: ISO Keywords Thesaurus
Theme Keyword: geoscientificInformation

Place:

Place Keyword Thesaurus: Maine GIS Thesaurus - Place
Place Keyword: Maine
Place Keyword: USA

Stratum:

Stratum Keyword Thesaurus: Maine GIS Thesaurus - Stratum
Stratum Keyword: hydrosphere

Access Constraints: Secondary distribution by permission only.
Use Constraints:
Users must assume responsibility in determining the usability of this data for their purposes. User must include full citation (author, pubdate, title, and source fields in associated attribute table) for the aquifer contacts when using the data in printed or digital form.
Point of Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Contact Address:

Address Type: mailing address
Address: 22 State House Station
City: Augusta
State or Province: ME
Postal Code: 04333-0022
Country: USA

Contact Voice Telephone: 207-287-2801

Data Set Credit:
Credit should be given to the data source and/or originator when data is transferred or printed. Source should be cited as: Maine Department of Conservation, Maine Geological Survey, 22 State House Station, Augusta, ME 04333-0022.
Native Data Set Environment: Office of Information Technology (OIT) Oracle 9i; Maine Office of Geographic Information Systems (MEGIS) ESRI Spatial Database Engine (SDE); Maine GIS users, "sdeuser", SDE.DEFAULT

Attribute Accuracy:

Attribute Accuracy Report:
Attribution of the data set was checked for data entry errors through a series of reviews that checked for inconsistencies with interpretation results. The coverage has been checked for label errors and attribution is complete.
Logical Consistency Report:
1: Aquifers are not mapped beneath water bodies 2: Aquifer contacts are defined by the source of the contact: derived from a political boundary (LTYPE = 'state'); derived from a USGS 7.5' quadrangle boundary (LTYPE = 'quad'); derived from a water body (LTYPE = 'water'); or, mapped by Maine Geological Survey personnel and digitized (LTYPE = 'xx'). The accuracy of mapped contacts is defined as either LSYMBOL = 11 (solid contact) or LSYMBOL = 12 (dashed contact). Solid contacts are relatively more accurately located than dashed contacts.

Completeness Report:
Significant aquifers are defined as bodies of coarse grained glacial material with the potential to yield 10 or more gallons-per-minute (gpm) to a properly constructed well. Aquifers are defined with a potential to yield greater than 10 gpm and aquifers with the potential to yield greater than 50 gpm (high-yield aquifers).
Positional Accuracy:

Horizontal Positional Accuracy:

Horizontal Positional Accuracy Report:
The data were compiled on a 1:24,000 scale base with a horizontal accuracy +/- 40 feet or 12 meters. Aquifer boundaries are drawn based on field observations of surficial materials in gravel pits, stream banks, road cuts, and other exposures. Mapping is supplemented with seismic-refraction studies and the installation of observation wells and test borings, information from water-company exploration, large construction projects, town well inventories, and other sources. This information, along with aerial photography and previously published maps, allows the geologist to define the boundaries of favorable surficial deposits and estimate how well the deposits will yield water to a well. Although interpretation rests on an extensive base of geologic information, analysis of bedrock surface and surficial materials, more often than not, prohibits a precise quantitative measure of horizontal accuracy. An arc coded with LSYMBOL = 11 (solid line) represents a more clearly defined boundary location than those coded LSYMBOL = 12 (dashed line).
Lineage:

Source Information:

Source Citation:

Citation Information:

Originator: U.S. Geological Survey (USGS)
Publication Date: multiple dates
Publication Time: Unknown
Title: (24k) USGS 1:24,000 scale quadrangles
Geospatial Data Presentation Form: map
Series Information:

Series Name: National Mapping Program Standard Series Topographic Maps
Issue Identification: USGS 7.5 Minute Map Series

Publication Information:

Publication Place: Reston VA
Publisher: U.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 Linkage: http://mapping.usgs.gov/mac/maplists/howtoselectmaps.html

Source Scale Denominator: 24000
Type of Source Media: stable-base material
Source Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date:
Beginning Time: Unknown
Ending Date: Unknown
Ending Time: Unknown

Source Currentness Reference: U.S. Geological Survey

Source Contribution: USGS 1:24,000 7.5' quadrangles used as mapping base

Process Step:

Process Description:
Significant aquifers are defined as bodies of coarse grained glacial material with the potential to yield 10 or more gallons-per-minute (gpm) to a properly constructed well. Aquifer boundaries are drawn based on field observations of surficial materials in gravel pits, stream banks, road cuts, and other exposures. This surficial geology mapping is supplemented with seismic-refraction studies and the installation of observation wells and test borings and information from water-company exploration, large construction projects, town well inventories, and other sources. This information, along with aerial photography and previously published maps (cited on the published map), allows the geologist to define the boundaries of favorable surficial deposits and estimate how well the deposits will yield water to a well.
The boundaries of favorable surficial deposits do not necessarily coincide with the aquifer boundaries. In some areas, a thin cover of favorable coarse-grained material may overlie fine-grained sediments, till, or bedrock. A well in that material would not be able to sustain a yield of 10 gpm, so the area would not be mapped as an aquifer. In other areas, fine-grained sediments or till may overlie favorable coarse-grained sediments and the subsurface deposit may not be recognized as an aquifer. Single- and 12-channel seismic-refraction studies are conducted to determine the saturated thickness of a deposit by establishing the depth to water table and bedrock surface. Installing monitoring wells and drilling test borings provide direct information about the aquifer characteristics of a deposit. This work provides information on the depth to water table and bedrock surface, water quality, and how easily the sediment transmits water. The information is compiled on a USGS 1:24000 topographic map. The aquifer contacts are based on an interpretation of information described above by a geologist and the aquifer contacts drawn on a stable mylar base. Aq

Process Date: publication date of published map
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Contact Address:

Address Type: mailing address
Address: 22 State House Station
City: Augusta
State or Province: ME
Postal Code: 04333-0022
Country: USA

Contact Voice Telephone: 207-287-2801

Process Step:

Process Description: Replaced aquifer contacts for MGS publication: 05-44, Significant sand and gravel aquifers in the Togus Pond quadrangle, Maine
Process Date: 20060130
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Contact Address:

Address Type: mailing address
Address: 22 State House Station
City: Augusta
State or Province: ME
Postal Code: 04333-0022
Country: USA

Contact Voice Telephone: 207-287-2801

Process Step:

Process Description:
Updated/replaced aquifer contacts for the following MGS publications: 06-3, Significant sand and gravel aquifers in the Petit Manan quadrangle, Maine
06-8, Significant sand and gravel aquifers in the Seal Harbor quadrangle, Maine
06-10, Significant sand and gravel aquifers in the Sargentville quadrangle, Maine
06-12, Significant sand and gravel aquifers in the Southwest Harbor quadrangle, Maine
06-13, Significant sand and gravel aquifers in the Castine quadrangle, Maine
06-24, Significant sand and gravel aquifers in the Buckfield quadrangle, Maine
Added aquifer contacts for the following MGS publications:
06-25, Significant sand and gravel aquifers in the Allagash Lake quadrangle, Maine
06-27, Significant sand and gravel aquifers in the Fish River Lake SW quadrangle, Maine
06-29, Significant sand and gravel aquifers in the Big Brook Lake quadrangle, Maine
06-31, Significant sand and gravel aquifers in the Five Finger Brook quadrangle, Maine
06-33, Significant sand and gravel aquifers in the McKeen Lake quadrangle, Maine
06-35, Significant sand and gravel aquifers in the Gardner Pond quadrangle, Maine
06-37, Significant sand and gravel aquifers in the Round Pond quadrangle, Maine

Process Date: 20060622
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Contact Address:

Address Type: mailing address
Address: 22 State House Station
City: Augusta
State or Province: ME
Postal Code: 04333-0022
Country: USA

Contact Voice Telephone: 207-287-2801

Process Step:

Process Description:
Added aquifer contacts for the following MGS publications: 06-40, Sand and gravel aquifers in the Houlton Pond quadrangle, Maine
06-42, Sand and gravel aquifers in the Seven Islands quadrangle, Maine
06-44, Sand and gravel aquifers in the Blue Brook quadrangle, Maine
06-46, Sand and gravel aquifers in the Big Black Rapids quadrangle, Maine
06-48, Sand and gravel aquifers in the Ninemile Deadwater quadrangle, Maine
06-50, Sand and gravel aquifers in the Charles Pond quadrangle, Maine
06-52, Sand and gravel aquifers in the St. Pmaphile quadrangle, Maine

Process Date: 20060707
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Contact Address:

Address Type: mailing address
Address: 22 State House Station
City: Augusta
State or Province: ME
Postal Code: 04333-0022
Country: USA

Contact Voice Telephone: 207-287-2801

Process Step:

Process Description:
Updated/replaced aquifer contacts for the following MGS publications: 06-72, Significant sand and gravel aquifers in the Worthley Pond quadrangle, Maine (supersedes publication 98-210)
06-73, Significant sand and gravel aquifers in the Canton quadrangle, Maine (supersedes publication 98-217)
06-74, Significant sand and gravel aquifers in the West Sumner quadrangle, Maine (supersedes publication 98-213)

Process Date: 20060721
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Contact Address:

Address Type: mailing address
Address: 22 State House Station
City: Augusta
State or Province: ME
Postal Code: 04333-0022
Country: USA

Contact Voice Telephone: 207-287-2801

Process Step:

Process Description:
Updated/replaced aquifer contacts for the following MGS publications: 06-76, Significant sand and gravel aquifers in the Searsmont quadrangle, Maine
06-78, Significant sand and gravel aquifers in the Lincolnville quadrangle, Maine
07-2, Significant sand and gravel aquifers in the Blue Hill quadrangle, Maine
07-4, Significant sand and gravel aquifers in the Salsbury Cove quadrangle, Maine
07-6, Significant sand and gravel aquifers in the Penobscot quadrangle, Maine
07-35, Significant sand and gravel aquifers in the Branch Lake quadrangle, Maine
Added aquifer contacts for the following MGS publications:
07-41, Significant sand and gravel aquifers in the Rocky Mountain NW quadrangle, Maine
07-43, Significant sand and gravel aquifers in the Beau Lake quadrangle, Maine
07-45, Significant sand and gravel aquifers in the Hafey Pond quadrangle, Maine
07-47, Significant sand and gravel aquifers in the Estcourt quadrangle, Maine
07-49, Significant sand and gravel aquifers in the Rocky Brook quadrangle, Maine
07-51, Significant sand and gravel aquifers in the Landry quadrangle, Maine

Process Date: 20070405
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Contact Address:

Address Type: mailing address
Address: 22 State House Station
City: Augusta
State or Province: ME
Postal Code: 04333-0022
Country: USA

Contact Voice Telephone: 207-287-2801

Process Step:

Process Description:
Updated/replaced aquifer contacts for the following MGS publications: 07-57, Significant sand and gravel aquifers in the Rocky Mountain SW quadrangle, Maine
07-59, Significant sand and gravel aquifers in the Schoolhouse Rapids quadrangle, Maine
07-61, Significant sand and gravel aquifers in the Big Rapids quadrangle, Maine
07-63, Significant sand and gravel aquifers in the East Lake SE quadrangle, Maine
07-75, Significant sand and gravel aquifers in the Greenwood quadrangle, Maine
07-76, Significant sand and gravel aquifers in the Kingfield quadrangle, Maine
07-97, Significant sand and gravel aquifers in the Mount Abraham quadrangle, Maine
07-148, Significant sand and gravel aquifers in the Kibby Mountain quadrangle, Maine
07-150, Significant sand and gravel aquifers in the Tumbledown Mountain quadrangle, Maine
08-2, Significant sand and gravel aquifers in the Basin Mountain quadrangle, Maine
08-4, Significant sand and gravel aquifers in the Pierce Pond quadrangle, Maine
08-6, Significant sand and gravel aquifers in the Enchanted Pond quadrangle, Maine
08-7, Significant sand and gravel aquifers in the King and Bartlett Lake quadrangle, Maine
08-9, Significant sand and gravel aquifers in the Big Spencer Mountain quadrangle, Maine
08-11, Significant sand and gravel aquifers in the King and Bartlett Mountain quadrangle, Maine
08-12, Significant sand and gravel aquifers in the East Carry Pond quadrangle, Maine
08-13, Significant sand and gravel aquifers in the The Forks quadrangle, Maine
08-14, Significant sand and gravel aquifers in the Spencer Lake quadrangle, Maine

Process Date: 20080318
Process Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)

Contact Address:

Address Type: mailing address
Address: 22 State House Station
City: Augusta
State or Province: ME
Postal Code: 04333-0022
Country: USA

Contact Voice Telephone: 207-287-2801

Process Step:

Process Description: Dataset copied.

Process Step:

Process Description:
Replaced aquifer contacts sources for the following MGS publications: 08-57, Significant sand and gravel aquifers in the Bangor quadrangle, Maine (supersedes 01-9).
08-58, Significant sand and gravel aquifers in the West Paris quadrangle, Maine (supersedes 98-212).
08-87, Significant sand and gravel aquifers in the Old Town quadrangle, Maine (supersedes 01-188).

Updated/replaced aquifer contacts for the following MGS publications:
08-54, Significant sand and gravel aquifers in the Big Shanty Mountain quadrangle, Maine (supersedes 98-59).
08-55, Significant sand and gravel aquifers in the Jo Mary Mountain quadrangle, Maine (supersedes 98-66).
08-59, Significant sand and gravel aquifers in the Turner Center quadrangle, Maine (supersedes 98-221).
08-61, Significant sand and gravel aquifers in the Livermore Falls quadrangle, Maine (supersedes 98-218).
08-67, Significant sand and gravel aquifers in the Wayne quadrangle, Maine (supersedes 04-79).
08-84, Significant sand and gravel aquifers in the Bryant Pond quadrangle, Maine (supersedes 98-208).
08-85, Significant sand and gravel aquifers in the Hay Mountain quadrangle, Maine (supersedes 98-11).
08-86, Significant sand and gravel aquifers in the Veazie quadrangle, Maine (supersedes 01-262).

Added aquifer contacts for the following MGS publications:
08-19, Significant sand and gravel aquifers in the Caribou Lake North quadrangle, Maine.
08-21, Significant sand and gravel aquifers in the Caribou Lake South quadrangle, Maine.
08-23, Significant sand and gravel aquifers in the Farrar Mountain quadrangle, Maine.
08-25, Significant sand and gravel aquifers in the Harrington Lake quadrangle, Maine.
08-27, Significant sand and gravel aquifers in the Pine Stream Flowage quadrangle, Maine.
08-29, Significant sand and gravel aquifers in the Rainbow Lake West quadrangle, Maine.
08-31, Significant sand and gravel aquifers in the Wadleigh Mountain quadrangle, Maine.

Process Step:

Process Description: Metadata imported.
Process Date: 20090218
Process Time: 09:17:42

Cloud Cover: 0

Direct Spatial Reference Method: Vector
Point and Vector Object Information:

SDTS Terms Description:

SDTS Point and Vector Object Type: String
Point and Vector Object Count: 22115

Horizontal Coordinate System Definition:

Geographic:

Latitude Resolution: 0
Longitude Resolution: 0

Geodetic Model:

Semi-major Axis: 0
Denominator of Flattening Ratio: 0

Vertical Coordinate System Definition:

Altitude System Definition:

Altitude Resolution: 0.000010
Altitude Encoding Method: Explicit elevation coordinate included with horizontal coordinates

Detailed Description:

Entity Type:

Entity Type Label: aquifer_contacts
Entity Type Definition: arc feature class
Entity Type Definition Source: ESRI

Attribute:

Attribute Label: AUTHOR
Attribute Definition: author(s) of the published significant aquifer open-file map
Attribute Definition Source: MGS

Attribute:

Attribute Label: LSYMBOL
Attribute Definition: line symbol for printed map
Attribute Definition Source: MGS
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: 0
Enumerated Domain Value Definition: invisible line (not plotted on printed map)

Enumerated Domain:

Enumerated Domain Value: 11
Enumerated Domain Value Definition: solid line

Enumerated Domain:

Enumerated Domain Value: 12
Enumerated Domain Value Definition: dashed line

Enumerated Domain:

Enumerated Domain Value: 16
Enumerated Domain Value Definition: invisible line (not plotted on printed map)

Attribute:

Attribute Label: LTYPE
Attribute Definition: source of contact line
Attribute Definition Source: MGS
Attribute Domain Values:

Enumerated Domain:

Enumerated Domain Value: state
Enumerated Domain Value Definition: derived from political boundary

Enumerated Domain:

Enumerated Domain Value: quad
Enumerated Domain Value Definition: derived from USGS 7.5' quadrangle boundary

Enumerated Domain:

Enumerated Domain Value: water
Enumerated Domain Value Definition: derived from 1:24,000 hydrography

Enumerated Domain:

Enumerated Domain Value: xx
Enumerated Domain Value Definition: mapped and digitized aquifer boundary

Attribute:

Attribute Label: OBJECTID
Attribute Definition: internal feature number
Attribute Definition Source: ESRI
Attribute Domain Values:

Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute Label: PUBCODE
Attribute Definition: Maine Geological Survey publication code/ordering number for the published significant aquifer open-file map
Attribute Definition Source: MGS

Attribute:

Attribute Label: PUBDATE
Attribute Definition: publication date of the published significant aquifer open-file map
Attribute Definition Source: MGS

Attribute:

Attribute Label: SOURCE
Attribute Definition: citation for the published significant aquifer open-file map
Attribute Definition Source: MGS

Attribute:

Attribute Label: Shape
Attribute Definition: feature geometry
Attribute Definition Source: ESRI
Attribute Domain Values:

Unrepresentable Domain: Coordinates defining the features.

Attribute:

Attribute Label: Shape_Length
Attribute Definition: length of feature in internal units
Attribute Definition Source: ESRI
Attribute Domain Values:

Unrepresentable Domain: positive real numbers that are automatically generated

Attribute:

Attribute Label: TITLE
Attribute Definition: title of the published significant aquifer open-file map
Attribute Definition Source: MGS

Overview Description:

Entity and Attribute Overview: Attribute table for aquifer contacts.

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: (MEGIS) Maine Office of Geographic Information Systems

Contact Position: GIS Coordinator
Contact Address:

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. 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.
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Digital Transfer Information:

Format Name: ESRI Shapefile
Format Version Number: ARC Version 9.x
Format Specification: ArcView Shapefile Format
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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.
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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 .
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Format Version Number: ARC Version 9.x
Format Specification: ArcView Shapefile Format
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MEGIS has made all layers, in the 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, and ArcExplorer; an existing ARC/INFO coverage can be converted to a shapefile by export; other spatial data formats can be converted to shapefiles. Three files are created for 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. CAUTION: When you edit an existing theme or shapefile you are creating a new version of a source; give your version a new name or a version identifier to reflect your edits. Be prepared to fully document your sources and to both quantify and qualify the edits you make in order to facilitate coordination with other data sources. PLEASE NOTE: conversion to shapefile format changes some characters ( # - .) to underscores; item names over 10 characters are truncated. An effort will be made over time to consider these limitations in item names, and to eliminate the use of these characters in Maine GIS data development. It should not be assumed that a conversion from shapefile back to coverage will produce the same data. The results of such a conversion are greatly improved by the use of PRECISION setting DOUBLE, DOUBLE and careful management of tolerances. Shapefiles tolerate overlapping features, coverages maintain these with correct attribution only if a REGIONS subclass is specified and retained.
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Format Specification: ArcView Shapefile Format
Format Information Content:
MEGIS will soon make all data in the internet Data Catalog available in ESRI's ArcView shapefile format. This additional format will first be available for E911 data under the TOWNS tab. 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; you can create your own data using the shapefile format; an existing ARC/INFO coverage can be converted to a shapefile; other spatial data formats can be converted to shapefiles. Three files are created for 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. CAUTION: When you edit an existing theme or shapefile you are creating a new dataset or at least a new version of a dataset; give the dataset a new name or a version identifier to reflect your edits. Be prepared to fully document your sources and to both quantify and qualify the edits you make in order to facilitate coordination with other data sources. PLEASE NOTE: conversion to shapefile format changes some characters ( # - .) to underscores; item names over 10 characters are truncated. An effort will be made over time to consider these limitations in item names, and to eliminate the use of these characters in Maine GIS data development. It should not be assumed that a conversion from shapefile back to coverage would produce the same data file as found in the original coverage format. The results of such a conversion are greatly improved by the use of PRECISION setting DOUBLE, DOUBLE and careful management of tolerances.
Digital Transfer Option:

Online Option:

Access Instructions: Anyone with an internet browser can view and download these data from the http address http://megis.maine.gov/catalog/. Please follow instructions on the website for the internet Data Catalog.

Digital Transfer Option:

Online Option:

Access Instructions: Where file size and internet access permit, data requests can be filled via File Transfer Protocol (FTP) from the ftp address ftp://ftp.state.me.us/.

Fees: Data may be downloaded from Maine GIS Data Catalog at no charge.
Turnaround: Data is available for immediate download from the Maine GIS Data Catalog.

Standard Order Process:

Non-digital Form: map
Fees:
MEGIS does some custom mapping, with available Maine GIS data, as time allows. If you have a custom mapping question please call the technical support line at (207) 287-6144 and ask about an estimate for your mapping needs.
Turnaround: 15 working days

Resource Description: Downloadable Data

Metadata Date: 2/13/2009
Metadata Review Date:
Metadata Future Review Date:
Metadata Contact:

Contact Information:

Contact Organization Primary:

Contact Organization: Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)
Contact Person: Director, Earth Resource Information

Contact Address:

Address Type: mailing address
Address: 22 State House Station
City: Augusta
State or Province: ME
Postal Code: 04333-0022
Country: USA

Contact Voice Telephone: 207-287-2801

Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
Metadata Extensions:

Online Linkage: http://www.esri.com/metadata/esriprof80.html
Profile Name: ESRI Metadata Profile

Metadata Extensions:

Online Linkage: http://www.esri.com/metadata/esriprof80.html
Profile Name: ESRI Metadata Profile