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SDE Feature Class
Tags
health, public water supply, watersheds, 24000, inlandWaters, utilities Communication, HEALTH AND SAFETY
DIRECTWATERSHED watersheds were extracted and modified from other watershed data to facilitate conduct of the source water assessment program. Its primary purpose is to assist in management of spatial nformation 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
DIRECTWATERSHED depicts watershed areas of surface waters that are active sources of Maine public water supplies, depicted at 1:24000 scale. For river systems, the watershed is arbitrarily truncated .5 mile (0.8 kilometers) upstream of the intake. For lake systems, the direct watershed is truncated at the first order bifurcation of each tributary stream. Watershed delineations for some public water supply surface waters were based on new delineations verified by field work. Data, from the Maine GIS dataset MEDRDVD were used to represent watershed boundaries where these provided the best known representation. When available, the local knowledge of the water supplier was used to adjust the boundaries. Some watersheds are not in active use by public water systems, but are held in reserve for future growth or emergencies. TINGIS, an attribute table, can be joined to this dataset to determine active water supplies.
Dataset developed by Maine CDC Drinking Water Program, with logistical and financial support from US EPA and MEGIS.
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) 624-7700. To request correction of, or provide updates to, Maine GIS data a feedback form is available athttp://www.maine.gov/megis/, 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.
Extent
| West | -71.032631 | East | -66.995975 |
| North | 47.371739 | South | 43.159880 |
Dataset developed by Maine CDC Drinking Water Program, with logistical and financial support from US EPA and MEGIS.
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) 624-7700. To request correction of, or provide updates to, Maine GIS data a feedback form is available athttp://www.maine.gov/megis/, 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.
polygon attribute table
Environmental Systems Research Institute, Inc. (ESRI)
PWSID expressed as a number
DWP
Internal feature number.
ESRI
area of source in acres
Maine DWP
8 digit Hydrologic Unit Code
U.S. Geological Survey (USGS)
feature geometry (SDE format)
ArcSDE
name of the surface water body serving as a public water supply source
Maine DWP
Feature geometry.
ESRI
a concatenation of the PWS identification number with the source identification number
DWP
DIRECTWATERSHED depicts watershed areas of surface waters that are active sources of Maine public water supplies, depicted at 1:24000 scale. For river systems, the watershed is arbitrarily truncated .5 mile (0.8 kilometers) upstream of the intake. For lake systems, the direct watershed is truncated at the first order bifurcation of each tributary stream. Watershed delineations for some public water supply surface waters were based on new delineations verified by field work. Data, from the Maine GIS dataset MEDRDVD were used to represent watershed boundaries where these provided the best known representation. When available, the local knowledge of the water supplier was used to adjust the boundaries. Some watersheds are not in active use by public water systems, but are held in reserve for future growth or emergencies. TINGIS, an attribute table, can be joined to this dataset to determine active water supplies.
DIRECTWATERSHED watersheds were extracted and modified from other watershed data to facilitate conduct of the source water assessment program. Its primary purpose is to assist in management of spatial nformation 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
ground condition
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.
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.
Dataset developed by Maine CDC Drinking Water Program, with logistical and financial support from US EPA and MEGIS.
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 DWP 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.
Spatial topology meets "Data Standards for Maine Geographic Information Systems", June 2002.
The data set is complete.
Approximate horizontal accuracy is 12 meters, assuming source data meets National Map Accuracy Standards.
In DIRECTWATERSHED some watersheds for Maine public water supplies are based on new delineations and verified by field work. For others, data from the Maine GIS dataset MEDRDVD were used to represent watershed boundaries where these provided the best known representation. When available, the local knowledge of the water supplier was used to adjust the boundaries. For river systems, the watershed is arbitrarily truncated .5 mile (0.8 kilometers) upstream of the intake. For lake systems, the direct watershed is truncated at the first order bifurcation of each tributary stream. Data was originally processed in ArcView in UTM NAD27, and then re-projected to NAD83.
In June, 2008, the dataset was edited to remove watersheds no longer utilized for public supply and to remove relict fields from the parent attribute table. Linking fields PWSID and UNIQUEID were added.
The Maine Drinking Water Program maintains extensive database of information on each surface water body that serves as a public water supply. DIRECTWATERSHED has been attributed to provide general reference information related to the unique identifier for each public water supply, USGS hydrologic unit code, surface water body name, and acreage with the items HUC, S_NAME, and ACRES. The PWSID and UNIQUEID fields provide links to DWP data in the TINGIS table located in the OGIS SDE database. TINGIS includes data on current use (activity) of the public water system associated with this source. Some watersheds are not in current 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, are liable for misuse of the data, for damage, for transmission of viruses, or for computer contamination through the distribution of these data sets.
Please contact the Maine Office of GIS (MEGIS) for access instructions.