WellModels

Identification Information

Citation Information

Originator	Maine Department of Human Services (MEDHS), Drinking Water Program
Publication Date	200310
Title	WellModels
Geospatial Data Presentation Form	vector digital data
Series Name	Maine GIS Data Catalog; Maine GIS SDE Server
Issue Identification	Source Water Protection Area (SWPA) Public Water Supply
Publication Place	Augusta ME
Publisher	Maine Department of Human Services, Drinking Water Program
Other Citation Details	WELLMODELS contains bedrock source water protection areas and polygons of sand/gravel 200 and 2500 day travel times. Both models were developed by the Maine Geological Survey (MGS) under an agreement with the Maine Drinking Water Program. MGS defined three levels of probability of contribution by bedrock source water protection areas to a well: low, moderate, and high, depending on the number of simulations where flow occurred. Only high and moderate probability areas are depicted in this dataset. MGS performed most of the S&G travel time modeling, while consultants for public water suppliers performed the remainder.
Online Linkage

Abstract

WELLMODELS contains bedrock source water protection areas and sand/gravel aquifer areas with 200-2500 day travel time in with a probability of contributing water to community public water supplies in Maine. The dataset is suitable for mapping at 1:24,000 or larger scale. The Maine Drinking Water Program (MEDWP), in cooperation with the Maine Geological Survey (MGS) has conducted probabilistic digital modeling of the contributing areas to selected community public water supplies. The models were run using the U.S. Geological Survey finite-difference ground-water flow model MODFLOW and the particle tracking package MODPATH. Available geologic and pump test data formed the primary inputs to the models. Additional information on MODFLOW and MODPATH and water resource modeling techniques is available at http://water.usgs.gov/nrp/gwsoftware/modflow.html and http://water.usgs.gov/pubs/twri/twri6a1/ .

Purpose

WELLMODELS was developed for use by the Maine Drinking Water Program and other entities to locate bedrock source water protection areas and sand/gravel aquifer areas with 200-2500 day travel times for Maine. Its primary purpose is to assist in management of spatial information about PWSs in compliance with the federal Safe Drinking Water Act as Amended 1996 and 22 MRSA Chapter 601. Detailed design decisions may require additional locational data. Field verification of location, ownership, and other attributes is strongly recommended. These data were developed with financial support from U.S. Environmental Protection Agency (USEPA).

Time Period of Content

Beginning Date	200108
Ending Date	200310
Currentness Reference	ground condition

Status

Progress	In work
Maintenance and Update Frequency	As needed

Bounding Coordinates

West Bounding Coordinate	-70.86624
East Bounding Coordinate	-68.03398
North Bounding Coordinate	46.03791
South Bounding Coordinate	43.23035

Keywords

Theme	public water supply, source water protection areas, 24000, bedrock, ground water, inlandWaters, NATURAL RESOURCES AND TOPOGRAPHY, geoscientificInformation, health, HEALTH AND SAFETY, sand and gravel, hydrogeology, travel time areas (Maine GIS Thesaurus-Theme)
Place	Maine (Maine GIS Thesaurus-Place)
Stratum	human dimensions, hydrosphere (Maine GIS Thesaurus-Stratum)

Access Constraints

These data are freely available for use; however, the data set should not be redistributed without permission. 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

Detailed design decisions may require additional locational data. Field verification of location, ownership, and other attributes is strongly recommended. 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. The Maine Office of Geographic Information Systems (MEGIS) provides notice of updates and corrections directly to the Maine GIS Technical Group and to Maine GIS Users, through the MEGISTECH and MEGISUSER list servers. To subscribe please contact the MEGIS technical support line at (207) 287-6144. To request correction of, or provide updates to, Maine GIS data a feedback form is available at http://megis.maine.gov/, or you may contact MEGIS directly. MEGIS is not responsible for local edits to data or metadata. 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 in consultation with the Maine GIS Executive Council.

Contact Organization

(MEDWP) Maine Department of Human Services, Drinking Water Program

Contact Person

Andrews Tolman

Contact Position

Manager Source Water Protection

Address Type

mailing address

Address

State House Station 11

City

Augusta

State or Province

Postal Code

04333-0010

Country

USA

Contact Voice Telephone

(207) 287-6196

Data Set Credit

Dataset developed by Maine Drinking Water Program, with logistical and financial support from USEPA. Additional models from Public Water Systems and their consultants, using the same or similar methods.

Native Data Set Environment

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.3, and (MEGIS) ArcInfo version 8.3, Solaris 7, pathname = /home11/crypt83/state/bdrkswpa and s&gtime, ~ file size 8.25 MB;Maine GIS SDE, Bureau of Information Services (BIS) Oracle 9i

Citation Information

Originator	Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
Publication Date	200210
Publication Time	Unknown
Title	wells
Geospatial Data Presentation Form	vector digital data
Series Name	Maine GIS Data Catalog; Maine GIS SDE Server
Issue Identification	Source Water Protection Area (SWPA) Public Water Supply
Publication Place	Augusta ME
Publisher	Maine Office of Geographic Information Systems (MEGIS)
Other Citation Details	24000 WELLS contains point locations for Maine's over 2500 wells and springs serving public water supplies.
Online Linkage	http://megis.maine.gov/catalog/

Citation Information

Originator	Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
Publication Date	200210
Title	wellsbuf
Geospatial Data Presentation Form	vector digital data
Series Name	Maine GIS Data Catalog; Maine GIS SDE Server
Issue Identification	Source Water Protection Area (SWPA) Public Water Supply
Publication Place	Augusta ME
Publisher	Maine Office of Geographic Information Systems (MEGIS)
Other Citation Details	24000 Circular buffers for wells ranging from 300 to 2,500 feet in radius, based on the population served by the system. 1000 foot buffers for surface water intakes. These buffers are used for systems where there is no model developed. In coverage format REGIONS must be used to preserve the spatial and attribute relationships between wells, intakes and buffers where features overlap.
Online Linkage	http://megis.maine.gov/catalog/

Attribute Accuracy Report

Attribute data are extracted from the State Drinking Water Information System (SIDWIS). Although this information is updated and checked for quality purposes on a regular basis, there are errors in the data. Additionally, the ownership of some PWSs changes over time, and should be checked for currency. Supplies may also be used seasonally, and may not be active. Supplies may go off-line, or be abandoned and the MEDWP may not be informed of their change in status.

Attribute Accuracy Value

good

Attribute Accuracy Explanation

Most attribute data is correct, but there are some data entry errors, and some information is based on owner's recollection, or may not be current.

Logical Consistency Report

All polygons and regions have a single unique user-id number. Spatial topology meets "Data Standards for Maine Geographic Information Systems", June 2002. REGIONERRORS, LABELERRORS, NODEERRORS have been resolved. Spatial topology is clean and free of errors. The coverage has been BUILT with POLYGON topology.

Completeness Report

The data set is complete. Maine Geological Survey defined three levels of probability of contribution by bedrock source water protection areas to a well: low, moderate, and high, depending on the number of simulations where flow occurred. Only high and moderate probability areas are depicted in this dataset.

Horizontal Positional Accuracy Report

GPS data were differentially corrected using Trimble base station data. Accuracy of the well locations which were collected by GPS can range from 1 cm to over 100 meters depending on the number of satellites in view, the position of satellites in relation to each other, the strengths of the satellite signals and the distance of the base station from the GPS receiver. Geoexplorers typically provide accuracy ranges of 2 to 5 meters. Polygons were developed using ground water models to estimate contributing areas. These models are dependent on estimates of subsurface geologic conditions, and new information about these conditions could require model update.

Citation Information

Originator	Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
Publication Date	unpublished material
Publication Time	Unknown
Title	(MEDWPGPS) Maine Drinking Water Program GPS, 1991-2003
Geospatial Data Presentation Form	tabular digital data
Other Citation Details	Locations in 1996-2003 were collected using Trimble Geoexplorer Global Positioning System (GPS) receivers. Locations in 1991 and 1995 were collected using Trimble Pathfinder GPS Receivers. GPS is a satellite-based positioning system operated and maintained by the U.S. Department of Defense. It consists of 24 NAVSTAR satellites that orbit the earth every twelve hours at an altitude of approximately 12,600 miles, as well as ground-based monitor and upload stations, which track and monitor the satellite orbits, and a master control station. GPS receivers use the signals sent by the satellites to determine where the satellites are and then use this information to calculate the user's position on the earth. Accuracy can range from 1 cm to over 100 meters depending on the number of satellites in view, the position of satellites in relation to each other, the strengths of the satellite signals and the distance of the base station from the GPS receiver. Geoexplorers typically provide accuracy ranges of 2 to 5 meters. Locations have been mapped using the North American Datum 27 (NAD27) later converted to NAD83 in Universal Transverse Mercator (UTM) coordinate system.

Source Scale Denominator

24000

Type of Source Media

computer program

Beginning Date

1991

Beginning Time

unknown

Ending Date

2003

Ending Time

unknown

Source Currentness Reference

ground condition

Source Citation Abbreviation

medwpgps

Citation Information

Originator	Maine Geological Survey (MGS)
Publication Date	19950101
Publication Time	Unknown
Title	bedrock
Geospatial Data Presentation Form	vector digital data
Series Name	Maine GIS Data Catalog; Maine GIS SDE Server
Publication Place	Augusta ME
Publisher	Maine Office of Geographic Information Systems
Other Citation Details	500000 Bedrock UNIT codes assigned to this coverage are available in comma delimited text, and .dbf format, on the MEGIS Data Catalog at http://megis.maine.gov/catalog/ .
Online Linkage	http://megis.maine.gov/catalog/

Source Scale Denominator

500000

Type of Source Media

online

Beginning Date

19851231

Beginning Time

Unknown

Ending Date

19941231

Ending Time

Unknown

Source Currentness Reference

source dates

Source Citation Abbreviation

bedrock

Citation Information

Originator	Maine Geological Survey (MGS)
Publication Date	20020820
Title	aqfrs24
Edition	second
Geospatial Data Presentation Form	vector digital data
Series Name	Maine GIS Data Catalog; Maine GIS SDE Server
Issue Identification	Significant Aquifers in 7.5' Quadrangle Open-File Number
Publication Place	Augusta ME
Publisher	Maine Office of Geographic Information Systems (MEGIS)
Other Citation Details	24000 Quadrangle compilers, quadrangle mappers, and Maine Geological Survey Significant Aquifers in 7.5' Quadrangle Open-File numbers for each mapped quadrangle are available in a related table "aq24meta" published in the MEGIS Data Catalog "Tables" link at http://megis.maine.gov/catalog/ .
Online Linkage	http://megis.maine.gov/catalog/

Source Scale Denominator

24000

Type of Source Media

online

Beginning Date

1998

Beginning Time

Unknown

Ending Date

20020820

Ending Time

Unknown

Source Currentness Reference

publication dates

Source Citation Abbreviation

aqfrs24

Citation Information

Originator	Maine Geological Survey (MGS)
Publication Date	19811231
Title	(SAGA) Sand and Gravel Aquifer Maps
Geospatial Data Presentation Form	atlas
Series Name	Sand and Gravel Aquifer Maps
Issue Identification	Sand and Gravel Aquifer Maps
Publication Place	Augusta ME
Publisher	Maine Geological Survey
Online Linkage	http://www.state.me.us/doc/nrimc/mgs/mgs.htm

Source Scale Denominator

50000

Type of Source Media

stable-base material

Beginning Date

19790101

Beginning Time

Unknown

Ending Date

19811231

Ending Time

Unknown

Source Currentness Reference

publication date

Source Citation Abbreviation

saga

Source Contribution

Existing Sand and Gravel Aquifer maps and existing unpublished MGS data, together with well exploration conducted by the water districts, provided a good base of knowledge at most sites for sand and gravel travel time modeling.

Citation Information

Originator	Maine Department of Human Services (MEDHS), Drinking Water Program
Publication Date	200307
Title	bdrkswpa
Geospatial Data Presentation Form	vector digital data
Series Name	Maine GIS Data Catalog; Maine GIS SDE Server
Issue Identification	Source Water Protection Area (SWPA) Public Water Supply
Publication Place	Augusta ME
Publisher	Maine Office of Geographic Information Systems (MEGIS)
Other Citation Details	Bedrock source water protection areas developed by the Maine Geological Survey under an agreement with the Maine Drinking Water Program. Areas are shown as three levels of probability of contributing water to a well: low, moderate, and high, depending on the number of simulations where flow occurred.
Online Linkage	http://megis.maine.gov/catalog/

Source Scale Denominator

24000

Calendar Date

200108

Time of Day

Unknown

Source Currentness Reference

ground condition

Source Citation Abbreviation

bdrkswpa

Source Contribution

Source mapping for WELLMODELS.

Citation Information

Originator	Maine Department of Human Services (MEDHS), Drinking Water Program
Publication Date	200210
Title	sgtime
Geospatial Data Presentation Form	vector digital data
Series Name	Maine GIS Data Catalog; Maine GIS SDE Server
Issue Identification	Source Water Protection Area (SWPA) Public Water Supply
Publication Place	Augusta ME
Publisher	Maine Office of Geographic Information Systems (MEGIS)
Other Citation Details	24000
Online Linkage	http://megis.maine.gov/catalog/

Source Scale Denominator

24000

Beginning Date

19940101

Beginning Time

Unknown

Ending Date

20021001

Ending Time

Unknown

Source Currentness Reference

ground condition

Source Citation Abbreviation

sgtime

Source Contribution

Source mapping for WELLMODELS.

Process Description

Bedrock source water protection areas in Maine with a high, moderate, or low probability of contributing water to community public water supplies were developed by the The Maine Drinking Water Program (MEDWP), in cooperation with the Maine Geological Survey (MGS). MGS conducted probabilistic digital modeling of the contributing areas to selected bedrock community public water supplies. The models were run using the U.S. Geological Survey finite-difference ground-water flow model MODFLOW and the particle tracking package MODPATH. Available geologic and pump test data formed the primary inputs to the models. A set of structured sensitivity analyses produced a probability plot of capture zones. Each model set was generalized into "high" "moderate" and "low" probability zones of contribution to the well(s). These data were developed with financial support from U.S. Environmental Protection Agency (USEPA). Additional information on MODFLOW and MODPATH and water resource modeling techniques is available at http://water.usgs.gov/nrp/gwsoftware/modflow.html and http://water.usgs.gov/pubs/twri/twri6a1/ .

Process Date

200108

Contact Organization

(MEDWP) Maine Department of Human Services, Drinking Water Program

Contact Person

Andrews Tolman

Contact Position

Manager Source Water Protection

Address Type

mailing address

Address

State House Station 11

City

Augusta

State or Province

Postal Code

04333-0010

Country

USA

Contact Voice Telephone

(207) 287-6196

Process Description

A public water supply ID (NUMBER0) and a randomly selected source ID for that public water supply (PWS) have been added to the WELLMODELS polygons. This allows for some table joins and analysis that previously was not possible. It isn't a perfect reflection of reality, since most of the polygons enclose, and reflect the use of, more than one well. However, the PWS's are correct, and the source ID is correct but may not be complete.

Process Date

200307

Contact Organization

(MEDWP) Maine Department of Human Services, Drinking Water Program

Contact Person

Andrews Tolman

Contact Position

Manager Source Water Protection

Address Type

mailing address

Address

State House Station 11

City

Augusta

State or Province

Postal Code

04333-0010

Country

USA

Contact Voice Telephone

(207) 287-6196

Process Description

Most 200 day and 2500 day travel time areas for selected Community Public Water Supply Wells in sand and gravel aquifers were developed using the U.S. Geological Survey finite-difference ground-water flow model MODFLOW and the particle tracking package MODPATH to calculate times of travel. Some were estimated using analytical methods. The Maine Geological Survey (MGS) performed most of the modeling, while consultants for public water suppliers performed the remainder. Details on hydrogeologic delineation, determination of ambient flow direction and rates, hydraulic properties of aquifers and contributing areas are available from MEDWP. Each site was visited, and any geologic exposures assessed. Site visits also served to verify water levels, locations, elevations, and use of wells, and related information. Additional information on MODFLOW and MODPATH and water resource modeling techniques is available at http://water.usgs.gov/nrp/gwsoftware/modflow.html and http://water.usgs.gov/pubs/twri/twri6a1/ .

Source Used Citation Abbreviation

medwpgps

Process Date

200210

Contact Organization

(MEDWP) Maine Department of Human Services, Drinking Water Program

Contact Person

Andrews Tolman

Contact Position

Manager Source Water Protection

Address Type

mailing address

Address

State House Station 11

City

Augusta

State or Province

Postal Code

04333-0010

Country

USA

Contact Voice Telephone

(207) 287-6196

Process Description

Data for bedrock source water protection and sand/gravel 200-2500 travel time areas were originally developed in two separate data layers BDRKSWPA and SGTIME. These were recompiled for use in SDE format and to serve the Maine Drinking Water Programs IMS application.

Source Used Citation Abbreviation

bdrkswpa

Source Used Citation Abbreviation

sgtime

Process Date

200306

Contact Organization

(MEDWP) Maine Department of Human Services, Drinking Water Program

Contact Person

Andrews Tolman

Contact Position

Manager Source Water Protection

Address Type

mailing address

Address

State House Station 11

City

Augusta

State or Province

Postal Code

04333-0010

Country

USA

Contact Voice Telephone

(207) 287-6196

Process Description

Metadata imported.

Source Used Citation Abbreviation

C:\DOCUME~1\intern\LOCALS~1\Temp\xml81.tmp

Process Description

Dataset copied.

Source Used Citation Abbreviation

Server=bisprodv208.dafs.state.me.us; Service=esri_sde; User=medwp; Version=SDE.DEFAULT

Process Description

Dataset copied.

Source Used Citation Abbreviation

Server=gisdatabase.dafs.state.me.us; Service=5154/tcp; User=medwp; Version=SDE.DEFAULT

Process Date

20100422

Process Time

11541800

Process Description

Metadata imported.

Source Used Citation Abbreviation

C:\temp\models510.shp.xml

Process Date

20111101

Process Time

11045900

Cloud Cover

Direct Spatial Reference Method

Vector

Point and Vector Object Information

Planar Coordinate Encoding Method

Abscissa Resolution

Ordinate Resolution

Planar Distance Units

Horizontal Datum Name

North American Datum of 1983

Ellipsoid Name

Geodetic Reference System 80

Semi-major Axis

6378137

Denominator of Flattening Ratio

298.257

Altitude Resolution

1.000000

Altitude Encoding Method

Explicit elevation coordinate included with horizontal coordinates

Entity Type Label

WELLMODELS.PAT

Entity Type Definition

polygon attribute table

Entity Type Definition Source

Environmental Systems Research Institute, Inc. (ESRI)

Attribute Label

FID

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

OBJECTID

Attribute Definition

internal feature identifier (SDE format)

Attribute Definition Source

ArcSDE

Unrepresentable Domain

Sequential unique whole numbers that are automatically generated.

Beginning Date of Attribute Values

Attribute Label

SHAPE

Attribute Definition

feature geometry (SDE format)

Attribute Definition Source

ArcSDE

Unrepresentable Domain

Coordinates defining the features.

Beginning Date of Attribute Values

Attribute Label

TYPE

Enumerated Domain Value

Enumerated Domain Value Definition

sand and gravel aquifer area with 200 day travel time to selected community public water supply well

Enumerated Domain Value

Enumerated Domain Value Definition

sand and gravel aquifer area with 2500 day travel time to selected community public water supply well

Enumerated Domain Value

Enumerated Domain Value Definition

bedrock source water protection area with MODERATE probability of contributing to a community public water supply

Enumerated Domain Value

Enumerated Domain Value Definition

bedrock source water protection area with HIGH probability of contributing to a community public water supply

Beginning Date of Attribute Values

Attribute Label

SHAPE_AREA

Attribute Definition

Area of feature in internal units squared.

Attribute Definition Source

ESRI

Unrepresentable Domain

Positive real numbers that are automatically generated.

Beginning Date of Attribute Values

Attribute Label

SHAPE_LEN

Beginning Date of Attribute Values

Entity Type Label

MEDWP.MODELED_BY

Entity and Attribute Overview

The Maine Drinking Water Program maintains an extensive database of information on each public water supply well in Maine. WELLMODELS contains bedrock source water protection areas, and sand/gravel aquifer areas with 200-2500 day travel times, that have a probability of contributing water to community public water supplies in Maine.The dataset is attributed with the item TYPE which describes the probability associated with each polygon.

Entity and Attribute Overview

Contact Organization

(MEGIS) Maine Office of Geographic Information Systems

Address Type

mailing address

Address

State House Station 145

City

Augusta

State or Province

Postal Code

04333-0145

Country

USA

Contact Voice Telephone

(207) 287-6144

Contact Facsimile Telephone

(207) 287-4563

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, are 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

ARCE

Format Version Number

ARC Version 8.3

Format Specification

ARC/INFO Export Format

Format Information Content

An Arc/Info export file is an interchange format used to transfer spatial data, INFO data files, and other ESRI ARC/INFO files between various machine types. Export files have the suffix .e00 and contain, in fixed-length ASCII format, all spatial information available for each feature. The command IMPORT is available in A/I to convert the export file to original format, i.e. coverage, grid, or other spatial data file. Import will add a spatial data file and a related INFO file to a machine directory. ESRI's ArcView is packaged with an import utility called IMPORT71 for the same export file conversion. The utility is also available through the FREE software link on the Maine GIS Data Catlaog under "CDProducts" at http://megis.maine.gov/catalog/ or from ESRI at http://www.esri.com/. CARE MUST BE TAKEN after import, not to separate the spatial information from its related INFO file. Since export files are in ASCII format make sure any file transfer method like FTP is executed under ASCII mode. Binary transfer will not work correctly.

[accinstr]

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

[accinstr]

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

Format Name

ESRI Shapefile

Format Version Number

ARC Version 8.3

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.

[accinstr]

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.

[accinstr]

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.

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

Custom Order Process

MEGIS provides technical support for Maine GIS data, estimates on custom mapping, and consultation on data and application development, as time permits. You may call (207) 287-6144 with questions about Maine GIS data, and to inquire about assistance with your GIS environment.

Metadata Reference Information

Metadata Date

20020318

Metadata Review Date

20040423

Metadata Contact

Contact Organization	(MEDWP) Maine Department of Human Services, Drinking Water Program
Contact Person	Andrews Tolman
Contact Position	Manager Source Water Protection
Address Type	mailing address
Address	State House Station 11
City	Augusta
State or Province	ME
Postal Code	04333-0010
Country	USA
Contact Voice Telephone	(207) 287-6196

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

Please confirm that you are using the most recent copy of both data and metadata from the Maine GIS Data Catalog. The Maine Office of Geographic Information Systems (MEGIS) provides notice of updates and corrections directly to the Maine GIS Technical Group and Maine GIS Users through the MEGISTECH and MEGISUSER list servers. To subscribe please contact the MEGIS technical support line at (207) 287-6144. To request correction in, or updates to, Maine GIS data a feedback form is available at http://megis.maine.gov/, or you may contact MEGIS directly. MEGIS is not responsible for local edits to data or metadata. 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 in consultation with the Maine GIS Executive Council.

Online Linkage

http://www.esri.com/metadata/esriprof80.html

Profile Name

ESRI Metadata Profile