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WellModels

SDE Feature Class

Tags
United States, travel time areas, geoscientificInformation, inlandWaters, hydrosphere, environment, Maine, human dimensions, utilitiesCommunication, planningCadastre, health, hydrogeology, ground water, public water supply, sand and gravel, source water protection areas


Summary

WELLMODS 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).

Description

WELLMODS 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/ .

Credits

Dataset developed by Maine Drinking Water Program, with logistical and financial support from USEPA.

Use limitations

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 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  -71.090831    East  -66.908948
North  47.319393    South  43.229013

Scale Range
Maximum (zoomed in)  1:24,000
Minimum (zoomed out)  1:500,000

ArcGIS Metadata 

Topics and Keywords 

Themes or categories of the resource  geoscientificInformation, planningCadastre, environment, inlandWaters, health, utilitiesCommunication


*Content type  Downloadable Data


Place keywords  United States, Maine

Thesaurus
Title Maine GIS Thesaurus-Place




Stratum keywords  hydrosphere, human dimensions

Thesaurus
Title GCMD Parameter Keyword




Theme keywords  geoscientificInformation, inlandWaters, environment, utilitiesCommunication, planningCadastre, health

Thesaurus
Title ISO Keyword Thesaurus




Theme keywords  travel time areas, hydrogeology, ground water, public water supply, sand and gravel, source water protection areas

Thesaurus
Title Maine GIS Thesaurus-Theme




Citation 

*Title GISVIEW.MEDWP.WellModels
Publication date 2004-04-01


Presentation formats  digital map
FGDC geospatial presentation format  vector digital data


Series
Name Source Water Protection Area (SWPA)
Issue Maine Public Water Supply

Other citation details 1:24000 WELLMODS 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.


Citation Contacts 

Responsible party
Organization's name Maine Office of Geographic Information Systems (MEGIS)
Contact's role  publisher


Contact information
Address
Delivery point Augusta ME



Responsible party
Organization's name Maine Department of Human Services (MEDHS), Drinking Water Program
Contact's role  originator


Resource Details 

Dataset languages  English (UNITED STATES)


Status  under development
Spatial representation type  vector


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


Credits
Dataset developed by Maine Drinking Water Program, with logistical and financial support from USEPA.
ArcGIS item properties
*Name GISVIEW.MEDWP.WellModels
*Size 1.186
*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=MEDWP; Version=dbo.DEFAULT
*Access protocol ArcSDE Connection

Extents 

Extent
Description
ground condition
Temporal extent
Beginning date 2001-08-01
Indeterminate time unknown
Ending date 2003-10-01
Indeterminate time unknown

Extent
Geographic extent
Bounding rectangle
West longitude -70.94642
East longitude -66.90909
South latitude 43.22902
North latitude 47.30031

Extent
Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -71.090831
*East longitude -66.908948
*North latitude 47.319393
*South latitude 43.229013
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude 341939.048200
*East longitude 658077.692900
*South latitude 4788086.458600
*North latitude 5240658.087600
*Extent contains the resource Yes

Resource Points of Contact 

Point of contact
Organization's name (MEDHHSDWP) Maine Department of Health and Human Services, Drinking Water Program
Contact's position Manager Source Water Protection
Contact's role  point of contact


Contact information
Phone
Voice (207) 287-6196

Address
Type postal
Delivery point State House Station 11
City Augusta
Administrative area ME
Postal code 04333-0010
Country US



Resource Maintenance 

Resource maintenance
Update frequency  as needed


Resource Constraints 

Legal constraints
Limitations of use
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.
Limitations of use
Users must assume responsibility to determine the usability of this data for their purposes.
Constraints
Limitations of use
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 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 -5120900
Y origin -9998100
XY scale 10000
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.001
Z tolerance 0.001
M tolerance 0.001
High precision true
Latest well-known identifier 26919
Well-known text PROJCS["NAD_1983_UTM_Zone_19N",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-69.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",26919]]

Reference system identifier
*Value 26919
*Codespace EPSG
*Version 7.11.2


Spatial Data Properties 

Vector
*Level of topology for this dataset  geometry only


Geometric objects
Feature class name GISVIEW.MEDWP.WellModels
*Object type  composite
*Object count 289



ArcGIS Feature Class Properties
Feature class name GISVIEW.MEDWP.WellModels
*Feature type Simple
*Geometry type Polygon
*Has topology FALSE
*Feature count 289
*Spatial index TRUE
*Linear referencing FALSE



Data Quality 

Scope of quality information
Resource level  dataset




Data quality report - Topological consistency
Evaluation method All polygons have a single unique user-id number. Spatial topology meets "Data Standards for Maine Geographic Information Systems", June 2002.




Data quality report - Conceptual consistency
Measure description All polygons have a single unique user-id number. Spatial topology meets "Data Standards for Maine Geographic Information Systems", June 2002.




Data quality report - Completeness omission
Measure description 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.




Data quality report - Quantitative attribute accuracy
Measure description 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.


Quantitative test results
Value good


Evaluation method 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.




Data quality report - Absolute external positional accuracy
Dimension horizontal


Measure description 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.


Quantitative test results
Value 5


Evaluation method Well model polygons were developed using ground water models to estimate contributing areas. These models are dependent on estimates of subsurface geologic conditions at public water supply well locations, and new information about geologic conditions could require model update. GPS data were differentially corrected using Trimble base station data. Parameters set for MEDHHS GPS collection Geoexplorers typically provide accuracy ranges of 2 to 5 meters.




Lineage 

Process step
When the process occurred 2003-06-01
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.


Process contact
Organization's name (MEDHHSDWP) Maine Department of Health and Human Services, Drinking Water Program
Contact's position Manager Source Water Protection
Contact's role  processor


Contact information
Phone
Voice (207) 287-6196

Address
Type postal
Delivery point State House Station 11
City Augusta
Administrative area ME
Postal code 04333-0010
Country US



Source data
Relationship to the process step used


Source citation
Alternate titles  sgtime






Source data
Relationship to the process step used


Source citation
Alternate titles  bdrkswpa








Process step
When the process occurred 2003-07-01
Description A public water supply ID (NUMBER0) and a randomly selected source ID for that public water supply (PWS) have been added to the WELLMODS 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 PWSs are correct, and the source ID is correct but may not be complete.


Process contact
Organization's name (MEDHHSDWP) Maine Department of Health and Human Services, Drinking Water Program
Contact's position Manager Source Water Protection
Contact's role  processor


Contact information
Phone
Voice (207) 287-6196

Address
Type postal
Delivery point State House Station 11
City Augusta
Administrative area ME
Postal code 04333-0010
Country US





Process step
When the process occurred 2001-08-01
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 contact
Organization's name (MEDHHSDWP) Maine Department of Health and Human Services, Drinking Water Program
Contact's position Manager Source Water Protection
Contact's role  processor


Contact information
Phone
Voice (207) 287-6196

Address
Type postal
Delivery point State House Station 11
City Augusta
Administrative area ME
Postal code 04333-0010
Country US





Process step
When the process occurred 2002-10-01
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/ .


Process contact
Organization's name (MEDHHSDWP) Maine Department of Health and Human Services, Drinking Water Program
Contact's position Manager Source Water Protection
Contact's role  processor


Contact information
Phone
Voice (207) 287-6196

Address
Type postal
Delivery point State House Station 11
City Augusta
Administrative area ME
Postal code 04333-0010
Country US



Source data
Relationship to the process step used


Source citation
Alternate titles  medwpgps








Source data
Source medium name  online link
Resolution of the source data
Scale denominator 24000

Source citation
Title (MEDWPGPS) Maine Drinking Water Program GPS, 1991-2003
Alternate titles  medwpgps
Publication date
Indeterminate date inapplicable
Indeterminate time unknown


Presentation formats  digital document
FGDC geospatial presentation format  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.


Responsible party
Organization's name Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
Contact's role  originator




Extent of the source data
Description
ground condition
Temporal extent
Beginning date 1991-01-01
Indeterminate time unknown
Ending date 2003-01-01
Indeterminate time unknown



Source data
Source medium name  online link
Resolution of the source data
Scale denominator 500000

Source citation
Title bedrock
Alternate titles  bedrock
Publication date 1995-01-01
Indeterminate time unknown


Presentation formats  digital map
FGDC geospatial presentation format  vector digital data


Series
Name Maine GIS
Issue SDE server; Internet Data Catalog

Other citation details 1:500000 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/ .


Responsible party
Organization's name Maine Office of Geographic Information Systems
Contact's role  publisher


Contact information
Address
Delivery point Augusta ME



Responsible party
Organization's name Maine Department of Conservation (MEDOC), Maine Geological Survey (MGS)
Contact's role  originator


Resource location online
Locationhttp://megis.maine.gov/catalog/



Extent of the source data
Description
source dates
Temporal extent
Beginning date 1985-12-31
Indeterminate time unknown
Ending date 1994-12-31
Indeterminate time unknown



Source data
Description Source mapping for WELLMODS.


Resolution of the source data
Scale denominator 24000

Source citation
Title sgtime
Alternate titles  sgtime
Publication date 2002-10-01


Presentation formats  digital map
FGDC geospatial presentation format  vector digital data


Series
Name Source Water Protection Area (SWPA)
Issue Maine Public Water Supply

Other citation details 1:24000


Responsible party
Organization's name Maine Department of Human Services (MEDHS), Drinking Water Program
Contact's role  originator


Responsible party
Organization's name Maine Office of Geographic Information Systems (MEGIS)
Contact's role  publisher


Contact information
Address
Delivery point Augusta ME



Resource location online
Locationhttp://megis.maine.gov/catalog/



Extent of the source data
Description
ground condition
Temporal extent
Beginning date 1994-01-01
Indeterminate time unknown
Ending date 2002-10-01
Indeterminate time unknown



Source data
Description 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.


Source medium name  hardcopy—diazo on paper
Resolution of the source data
Scale denominator 50000

Source citation
Title (SAGA) Sand and Gravel Aquifer Maps
Alternate titles  saga
Publication date 1981-12-31


Presentation formats  hardcopy map
FGDC geospatial presentation format  atlas


Series
Name Sand and Gravel Aquifer Maps
Issue Sand and Gravel Aquifer Maps

Responsible party
Organization's name Maine Geological Survey (MGS)
Contact's role  originator


Responsible party
Organization's name Maine Geological Survey
Contact's role  publisher


Contact information
Address
Delivery point Augusta ME



Resource location online
Locationhttp://www.maine.gov/doc/nrimc/mgs/mgs.htm



Extent of the source data
Description
publication date
Temporal extent
Beginning date 1979-01-01
Indeterminate time unknown
Ending date 1981-12-31
Indeterminate time unknown



Source data
Source medium name  online link
Resolution of the source data
Scale denominator 24000

Source citation
Title aqfrs24
Alternate titles  aqfrs24
Publication date 2002-08-20


Edition second


Presentation formats  digital map
FGDC geospatial presentation format  vector digital data


Series
Name 7.5' Quadrangle Open-File Numbe
Issue Significant Aquifers

Other citation details 1:24000 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/ .


Responsible party
Organization's name Maine Geological Survey (MGS)
Contact's role  originator


Responsible party
Organization's name Maine Office of Geographic Information Systems (MEGIS)
Contact's role  publisher


Contact information
Address
Delivery point Augusta ME



Resource location online
Locationhttp://megis.maine.gov/catalog/



Extent of the source data
Description
publication dates
Temporal extent
Beginning date 1998-01-01
Indeterminate time unknown
Ending date 2002-08-20
Indeterminate time unknown



Source data
Description Source mapping for WELLMODS.


Resolution of the source data
Scale denominator 24000

Source citation
Title bdrkswpa
Alternate titles  bdrkswpa
Publication date 2003-07-01


Presentation formats  digital map
FGDC geospatial presentation format  vector digital data


Series
Name Source Water Protection Area (SWPA)
Issue Public Water Suppy

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.


Responsible party
Organization's name Maine Office of Geographic Information Systems (MEGIS)
Contact's role  publisher


Contact information
Address
Delivery point Augusta ME



Responsible party
Organization's name Maine Department of Human Services (MEDHS), Drinking Water Program
Contact's role  originator


Resource location online
Locationhttp://megis.maine.gov/catalog/



Extent of the source data
Description
ground condition
Temporal extent
Date and time 2001-08-01
Indeterminate time unknown



Distribution 

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


Contact information
Phone
Voice 207 624-7700
Fax 207 287-3842

Address
Type postal
Delivery point State House Station 174
City Augusta
Administrative area ME
Postal code 04333-0174
Country US

Hours of service Monday through Friday 0800 - 1700 EST


Available format
Name ESRI Shapefile
Version ARC Version 9.x
Specification ArcView Shapefile Format
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/.
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.


Ordering process
Terms and fees Data may be downloaded from Maine GIS Internet Data Catalog at no charge.
Turnaround time Data is available for immediate download from the Maine GIS Internet Data Catalog.

Transfer options
Online source
Locationhttp://megis.maine.gov/catalog/
Description  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 .



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


Contact information
Phone
Voice (207) 624-7700
Fax (207) 287-3842

Address
Type postal
Delivery point State House Station 174
City Augusta
Administrative area ME
Postal code 04333-0174
Country US

Hours of service Monday through Friday 0800 - 1700 EST


Available format
Name ARCSDE
Version ArcSDE 9.x
Format information content Oracle 9i


Ordering process
Terms and 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.



Distribution format
*Name SDE Feature Class


Transfer options
Online source
Locationhttp://megis.maine.gov/catalog/

Fields 

Details for object GISVIEW.MEDWP.WellModels 
*Type Feature Class
*Row count 289
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 TYPE
 
*Alias TYPE
*Data type SmallInteger
*Width 2
*Precision 5
*Scale 0


List of values




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 The Maine Drinking Water Program maintains an extensive database of information on each public water supply well in Maine. WELLMODS 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 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.




References 

Aggregate Information
Association type  cross reference


Aggregate resource name
Title wellsbuf_old
Publication date 2004-04-01


Presentation formats  digital map
FGDC geospatial presentation format  vector digital data


Series
Name Source Water Protection Area (SWPA)
Issue Maine Public Water Supply

Other citation details 1:24000 Circular buffers for wells ranging from 300 to 2,500 feet in radius, based on the population served by the system. These circular buffers are used for systems where there is no model developed.


Responsible party
Organization's name Maine Office of Geographic Information Systems (MEGIS)
Contact's role  publisher


Contact information
Address
Delivery point Augusta ME



Responsible party
Organization's name Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
Contact's role  originator


Resource location online
Locationhttp://megis.maine.gov/catalog/



Aggregate Information
Association type  cross reference


Aggregate resource name
Title wells
Publication date 2004-04-01
Indeterminate time unknown


Presentation formats  digital map
FGDC geospatial presentation format  vector digital data


Series
Name Source Water Protection Area (SWPA)
Issue Maine Public Water Supply

Other citation details 1:24000 WELLS contains point locations for Maine's over 2500 wells and springs serving public water supplies.


Responsible party
Organization's name Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
Contact's role  originator


Responsible party
Organization's name Maine Office of Geographic Information Systems (MEGIS)
Contact's role  publisher


Contact information
Address
Delivery point Augusta ME



Resource location online
Locationhttp://megis.maine.gov/catalog/



Metadata Details 

Metadata language English (UNITED STATES)
Metadata character set  utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata  dataset
Scope name* dataset


*Last update 2013-11-12


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


Created in ArcGIS for the item 2011-11-01 11:04:59
Last modified in ArcGIS for the item 2013-11-12 14:25:22


Automatic updates
Have been performed Yes
Last update 2013-11-12 14:25:22


Metadata Contacts 

Metadata contact
Organization's name (MEDHHSDWP) Maine Department of Health and Human Services, Drinking Water Program
Contact's position Manager Source Water Protection
Contact's role  point of contact


Contact information
Phone
Voice (207) 287-6196

Address
Type postal
Delivery point State House Station 11
City Augusta
Administrative area ME
Postal code 04333-0010
Country US



Metadata Maintenance 

Maintenance
Update frequency  unknown


Other maintenance requirements Last metadata review date: 20100120


Thumbnail and Enclosures 

FGDC Metadata (read-only) 

Entities and Attributes 

Detailed Description
Entity Type
Entity Type LabelGISVIEW.MEDWP.WellModels
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 LabelTYPE
Attribute Domain Values
Enumerated Domain

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
                            The Maine Drinking Water Program maintains an extensive database of information on each public water supply well in Maine. WELLMODS 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 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.