20250820
10242000
1.0
FALSE
GISVIEW.MEDWP.WellBuffers
338699.952000
660912.663000
4760952.560200
5244755.923700
1
002
Projected
GCS_North_American_1983
NAD_1983_UTM_Zone_19N
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Linear Unit: Meter (1.000000)
20190515
12264300
20190515
12264300
24000
24000
FGDC
Andrews Tolman
(MEDWP) Maine Department of Human Services, Drinking Water Program
Manager Source Water Protection
(207) 287-6196
State House Station 11
Augusta
ME
04333-0010
US
20190515
ArcGIS Metadata
1.0
(MEGIS) Maine Office of Geographic Information Systems
(207) 287-6144
(207) 287-4563
State House Station 145
Augusta
ME
04333-0145
US
Monday through Friday 0800 - 1700 EST
Data may be downloaded from Maine GIS Data Catalog at no charge.
Data is available for immediate download from the Maine GIS Data Catalog.
ESRI Shapefile
ARC Version 8.3
ArcView Shapefile Format
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.
ARCE
ARC Version 8.3
ARC/INFO Export Format
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.
(MEGIS) Maine Office of Geographic Information Systems
(207) 287-6144
(207) 287-4563
State House Station 145
Augusta
ME
04333-0145
US
Monday through Friday 0800 - 1700 EST
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.
15 working days
map
Feature Class
GISVIEW.MEDWP.WellBuffers
2003-10-01
Maine Department of Human Services, Drinking Water Program
Augusta ME
Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
vector digital data
Maine GIS Data Catalog; Maine GIS SDE Server
Source Water Protection Area (SWPA) Public Water Supply
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 circular buffers are used for systems where there is no model developed.
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>WELLBUFFERS contains circular buffers that represent source water protection areas for wells and surface water intakes that serve the public water supply in Maine. Well buffers are proportional to population served and/or by the type of water supply system. These buffers range from 300 to 2,500 feet in radius. Intake buffers represent a 1000 foot radius around the location of a public water supply surface water intake. PWS travel time or probabilistic source protection areas are depicted in WELLMODELS and are not included in this buffer dataset. There are 3 types of public water systems in Maine: Transient Systems (restaurants, boys and girls camps, campgrounds, motels, bottled water companies, etc.); Community Systems (utilities, mobile home parks, nursing homes, etc.); and Non-transient, Non-Community (NTNC) Systems (schools, offices, factories, etc.).</SPAN></P></DIV></DIV>
This dataset was developed for use by the MEDWP and other entities. 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. The dataset was developed by the Maine Department of Human Services, Drinking Water Program, with logistical and financial support from U.S. Environmental Protection Agency (USEPA). These areas are also regulated under PL 761, requiring notice to the water supplier of locally permitted activities.
Dataset developed by Maine Drinking Water Program, with logistical and financial support from USEPA. Credit should always be given to the data source and/or originator when the data is transferred or printed.
Andrews Tolman
(MEDWP) Maine Department of Human Services, Drinking Water Program
Manager Source Water Protection
(207) 287-6196
State House Station 11
Augusta
ME
04333-0010
US
Maine GIS Thesaurus, Place
Maine
Maine GIS Thesaurus-Stratum
human dimensions
hydrosphere
Maine GIS Thesaurus-Theme
HEALTH AND SAFETY
source water protection areas
intake protection areas
utilitiesCommunication
24000
INFRASTRUCTURE
health
wellhead protection areas
well buffers
inlandWaters
public water supply
intake buffers
HEALTH AND SAFETY
human dimensions
source water protection areas
hydrosphere
intake protection areas
utilitiesCommunication
24000
INFRASTRUCTURE
health
wellhead protection areas
Maine
well buffers
inlandWaters
public water supply
intake buffers
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.
These data are freely available for use; however, the data set should not be redistributed without permission. Any secondary distribution must have this documentation appended.
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>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. </SPAN></P></DIV></DIV>
wells
2002-10-01
Maine Office of Geographic Information Systems (MEGIS)
Augusta ME
Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
vector digital data
Maine GIS Data Catalog; Maine GIS SDE Server
Source Water Protection Area (SWPA) Public Water Supply
24000 WELLS contains point locations for Maine's over 2500 wells and springs serving public water supplies.
http://megis.maine.gov/catalog/
Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9273
-70.96951
-66.89763
42.98429
47.33573
ground condition
Transient Systems: The wellhead protection area (WHPA) for all Transient systems has a radius of 91.44 meters (300 ft). Community and NTNC Systems: The attributes provide the radius used for community and non-transient, non-community systems, which is calculated based on the number of customers they serve:
1
-71.135132
-66.869992
47.356266
42.984139
Last metadata review date: 20040422
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.
The radius of the protection area is determined based on water system type and number of customers served. All polygons and regions have a single unique user-id number. Spatial topology meets "Data Standards for Maine Geographic Information Systems", June 2002. LABELERRORS, NODEERRORS have been resolved. Spatial topology is clean and free of errors. The coverage has been BUILT with POLYGON topology.
The radius of the protection area is determined based on water system type and number of customers served. All polygons and regions have a single unique user-id number. Spatial topology meets "Data Standards for Maine Geographic Information Systems", June 2002. LABELERRORS, NODEERRORS have been resolved. Spatial topology is clean and free of errors. The coverage has been BUILT with POLYGON topology.
The data set is complete. PWS travel time or probabilistic source protection areas are depicted in WELLMODELS and not included in this buffer dataset.
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. 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.
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.
good
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.
Buffers are calculated based on the GPS location of the wells.
Buffers are calculated based on the GPS location of the wells. Source data for WELLBUFFERS.
24000
(24k) USGS 1:24,000 scale quadrangles
wells
U.S. Geological Survey
Reston VA
U.S. Geological Survey (USGS)
map
National Mapping Program Standard Series Topographic Maps
USGS 7.5 Minute Map Series
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.
http://mapping.usgs.gov/mac/maplists/howtoselectmaps.html
publication date
1948-01-01
24000
(MEDWPGPS) Maine Drinking Water Program GPS, 1991-2003
medwpgps
Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
tabular digital data
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.
ground condition
1991-01-01
2003-01-01
Buffers are calculated based on the GPS location of the intakes. Source data for WELLBUFFERS.
24000
intakes
intakes
2003-06-01
Maine Office of Geographic Information Systems (MEGIS)
Augusta ME
Maine Department of Human Services (MEDHS), Drinking Water Program (MEDWP)
vector digital data
Maine GIS Data Catalog; Maine GIS SDE Server
Source Water Protection Area (SWPA) Public Water Supply
24000
http://megis.maine.gov/catalog/
ground condition
2003-06-01
Well buffers are created using an Arcview Avenue script that calculates buffer radius based on the population served.
2000-01-10
Andrews Tolman
(MEDWP) Maine Department of Human Services, Drinking Water Program
Manager Source Water Protection
(207) 287-6196
State House Station 11
Augusta
ME
04333-0010
US
wells
Data collected during the field season are incorporated into WELLBUFFERS for an annual update.
2002-10-01
Andrews Tolman
(MEDWP) Maine Department of Human Services, Drinking Water Program
Manager Source Water Protection
(207) 287-6196
State House Station 11
Augusta
ME
04333-0010
US
wells
Data for public water supply wells and intakes previously two separate data layers were recompiled for use in SDE format and to serve the Maine Drinking Water Programs IMS application.
2003-06-01
(MEGIS) Maine Office of Geographic Information Systems
(207) 287-6144
(207) 287-4563
State House Station 145
Augusta
ME
04333-0145
US
Monday through Friday 0800 - 1700 EST
2046
The Maine Drinking Water Program maintains an extensive database of information on each public water supply well. PWS travel or probabilistic source protection areas are depicted in WELLMODELS and not included in this buffer dataset. The radius of the protection area is determined based on water system type and number of customers served. See table provided in Supplemental Information for additional information. PWSID can be used to relate to existing, or build additional, detailed database information. Other items provide information on BUFFER_ID, TYPE of public water system.
GISVIEW.MEDWP.WellBuffers
Feature Class
2046
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
PWSID
PWSID
String
12
0
0
FACID
FACID
String
254
0
0
GlobalID
GlobalID
GlobalID
38
0
0
RADIUS_M
RADIUS_M
Double
8
38
8
RADIUS_F
RADIUS_F
Double
8
38
8
FAC_TYPE
FAC_TYPE
String
254
0
0
SOURCEID
SOURCEID
String
254
0
0
S_NAME
S_NAME
String
40
0
0
POP
POP
Double
8
38
8
NUM_WELL
NUM_WELL
Double
8
38
8
NUM_INTK
NUM_INTK
Double
8
38
8
SRCE_NM
SRCE_NM
String
40
0
0
DEPTH_FT
DEPTH_FT
Double
8
38
8
GPM
GPM
Double
8
38
8
DIAM_IN
DIAM_IN
Double
8
38
8
S_TYPE
S_TYPE
String
4
0
0
TYPE_CD
TYPE_CD
String
2
0
0
O_STREET
O_STREET
String
40
0
0
O_CITY
O_CITY
String
40
0
0
O_STATE
O_STATE
String
2
0
0
O_ZIP
O_ZIP
String
10
0
0
O_NAME
O_NAME
String
254
0
0
DRILL_DT
DRILL_DT
Date
8
0
0
GEOCODE
GEOCODE
String
8
0
0
S_ST_DT
S_ST_DT
String
254
0
0
S_END_DT
S_END_DT
String
254
0
0
S_STATUS
S_STATUS
String
1
0
0
F_STATUS
F_STATUS
String
1
0
0
Shape
Shape
Geometry
4
0
0
Feature geometry.
Esri
Coordinates defining the features.
Shape.STArea()
Shape.STArea()
Double
0
0
0
Shape.STLength()
Shape.STLength()
Double
0
0
0
dataset
EPSG
6.13(3.0.1)
Simple
FALSE
2046
TRUE
FALSE