Identification_Information: Citation: Citation_Information: Originator: Maine Natural Resources Conservation Service State Office Publication_Date: July 30, 2008 Publication_Time: Title: hu12_a_me Edition: 1 Geospatial_Data_Presentation_Form: vector digital data Publication_Information: Publication_Place: Bangor, Maine Publisher: USDA Natural Resources Conservation Service Online_Linkage: http://www.ncgc.nrcs.usda.gov/products/datasets/watershed/index.html Description: Abstract: This dataset is in the Personal Geodatabase format and is a complete digital hydrologic unit boundary layer to the Sub-watershed (12-digit) 6th level for the State of Maine. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "FGDC Proposal, Version 1.0 - Federal Standards For Delineation of Hydrologic Unit Boundaries 3/01/02" (http://www.ftw.nrcs.usda.gov/huc_data.html). Polygons are attributed with hydrologic unit codes for 4th level sub-basins, 5th level watersheds, 6th level sub-watersheds, name, size, downstream hydrologic unit, type of watershed, non-contributing areas and flow modification. Arcs are attributed with the highest hydrologic unit code for each watershed, linesource and a metadata reference file. Purpose: The Watershed and Sub-watershed hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. The smaller sized 6th level sub-watersheds (up to 40,000 acres) are useful for numerous application programs supported by a variety of local, State, and Federal Agencies. This data set is intended to be used as a tool for water-resource management and planning activities, particularly for site-specific and localized studies requiring a level of detail provided by large-scale map information. The dataset will be appended to a larger seamless nationally consistent geospatial database as other states complete their portion of the watershed boundary dataset. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20080730 Currentness_Reference: Publication date of sources Status: Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.522883 East_Bounding_Coordinate: -66.004356 North_Bounding_Coordinate: 48.100171 South_Bounding_Coordinate: 42.886238 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: HUC Theme_Keyword: Hydrologic Units Theme_Keyword: Hydrologic Unit Code Theme_Keyword: Region Theme_Keyword: Sub-region Theme_Keyword: Basin Theme_Keyword: Sub-basin Theme_Keyword: Watershed Theme_Keyword: Watershed Boundaries Theme_Keyword: boundaries Theme_Keyword: Sub-watershed Theme_Keyword: WBD Theme_Keyword: Watershed Boundary Dataset Theme_Keyword: Level 4 Sub-basin Theme_Keyword: Level 5 Watershed Theme_Keyword: Level 6 Sub-watershed Theme_Keyword: HUC12 Theme_Keyword: HUC10 Theme_Keyword: HUC8 Place: Place_Keyword_Thesaurus: None Place_Keyword: Maine Place_Keyword: Kennebec River Place_Keyword: St. John River Place_Keyword: Allagash River Place_Keyword: Fish River Place_Keyword: Aroostook River Place_Keyword: Prestile Stream Place_Keyword: Meduxnekeag River Place_Keyword: Penobscot River Place_Keyword: Mattawamkeag River Place_Keyword: Piscataquis River Place_Keyword: Androscoggin River Place_Keyword: Dead River Place_Keyword: St. Croix River Place_Keyword: Coastal Hancock/Washington Drainages Place_Keyword: Coastal Drainages East of Small Point Place_Keyword: Presumpscot River Place_Keyword: Casco Bay Place_Keyword: Saco River Place_Keyword: York County Coastal/Portsmouth Harbor Place_Keyword: Passamaquoddy Bay Place_Keyword: Bay of Fundy Access_Constraints: None Use_Constraints: The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in 7. 5 should be acknowledged as the data source in products derived from these data. The 7 Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data from the source distributor. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USDA Natural Resources Conservation Service Contact_Person: GIS Coordinator Contact_Address: Address_Type: mailing address Address: 967 Illinois Avenue, Suite 3 City: Bangor State_or_Province: ME Postal_Code: 04401 Contact_Voice_Telephone: 207-990-9100, ext. 3 Contact_Electronic_Mail_Address: ray.voyer@me.usda.gov Contact_Instructions: Please email questions and requests. Data_Set_Credit: Funding for the Maine Watershed Boundary Dataset (WBD) was provided by the Environmental Protection Agency. Representatives from the Maine Department of Environmental Protection, the USGS Maine Water Science Center, the Maine Geological Survey, and the Maine Office of GIS contributed a substantial amount of time and salary towards quality review of the dataset. Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350 Data_Quality_Information: Logical_Consistency_Report: This dataset was developed as a polygon feature class within the ESRI personal geodatabase model. After attribution the polygon feature class was converted to a line feature class. Feature level metadata attributes were added to the line feature class after planarizing. Polygon label points were converted to a point feature class. All attributes required by the standard were filled. Topology between the three feature classes was developed using the rules file provided by NRCS National Geospatial Center, Ft. Worth, TX. Topology was validated and corrected both in UTM Zone 19N NAD83 and GCS NAD83 projections. There are no topological errors in this dataset as of the publication date. Completeness_Report: All fields for all polygons in the geodatabase are attributed. Some polygons in the Ncontrb_a field might have a 0 value. All fields for the lines in the geodatabase are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The WBD was produced using Enhanced Digital Raster Graphics (DRG-Es) digital images as source map. Data completeness for DRG files reflect content of the source graphic and may therefore be reflected in the completeness and accuracy of the WBD. The map was digitized from USGS 1:24,000-scale digital raster graphic base maps, with an inherited error of +/- 40 feet according to USGS National Map Accuracy Standards. Digitized line locations were held to the +/- 40 foot accuracy standards by ensuring that all lines were within a 12 meter buffer of where visual interpretation put the actual boundary. Any lines outside the buffer were corrected. It is estimated that the errors detected were less than 10%. It should be noted that while general rules of hydrology were used (i.e. water flows downhill), the location of boundaries is still somewhat subjective as the 1:24,000-scale DRG-E do not always provide enough information for identifying the location of the boundaries. In these instances group consensus was used. Please refer to the methods section for more details on watershed delineation rules. Unquantifiable errors may be associated with coordinate shift (fuzzy tolerance was set to 0.000000001 meters, double precision), dangle (set to 15 meters). The default was used for all other ArcEdit tolerances. As with the original DRGs, DRG-E is cast in the Universal Transverse Mercator projection and is referenced to the NAD27 datum. When the DRGs are used in the NAD83 datum the alternate world files only approximate the NAD83 by shifting the coordinates of the imagery. The total error introduced using this shift is less than 2 meters for all DRG-E imagery. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Maine Office of GIS Publication_Date: 01/01/1994 Title: Maine Drainage Divides (MEDRDVD) Geospatial_Data_Presentation_Form: ArcView Shapefile Online_Linkage: http://megis.maine.gov/catalog/ Source_Scale_Denominator: 24000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 01/01/1994 Ending_Date: unknown Source_Currentness_Reference: map delineation Source_Citation_Abbreviation: MEDRDVD Source_Contribution: Statewide dataset with over 8000 unattributed polygons that delineated watersheds as small as 2 acres for streams and ponds. Source_Information: Source_Citation: Citation_Information: Originator: Maine Office of GIS Publication_Date: 03/28/2004 Title: Maine Watershed Boundary Dataset Geospatial_Data_Presentation_Form: ArcView Shapefile Online_Linkage: http://megis.maine.gov/catalog/ Source_Scale_Denominator: 24000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 03/28/2004 Ending_Date: 02/22/2008 Source_Currentness_Reference: map delineation Source_Citation_Abbreviation: wbd6_a_me Source_Contribution: Foundation dataset for WBD Certification process. Source_Information: Source_Citation: Citation_Information: Originator: USGS Publication_Date: Unknown Title: Digital Raster Graphics, 1:24000 Geospatial_Data_Presentation_Form: MrSID county mosaics Source_Scale_Denominator: 24000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: Unknown Ending_Date: Unknown Source_Currentness_Reference: map delineation Source_Citation_Abbreviation: DRG24 Source_Contribution: Contour lines and shorelines for boundary delineation and pourpoint delineation. Source_Information: Source_Citation: Citation_Information: Originator: USGS Publication_Date: 01/01/1994 Title: Digital Elevation Models, 10 and 30 meter Geospatial_Data_Presentation_Form: ESRI GRID Online_Linkage: http://seamless.usgs.gov/ Source_Scale_Denominator: 24000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 01/01/1994 Ending_Date: Unknown Source_Currentness_Reference: map delineation Source_Citation_Abbreviation: DEM10 Source_Contribution: Base data for deriving hillshades and spot elevations for break line delineation. Source_Information: Source_Citation: Citation_Information: Originator: USGS Publication_Date: 10/24/2005 Title: National Hydrography Dataset (NHD24) Geospatial_Data_Presentation_Form: ESRI Personal Geodatabase Online_Linkage: http://nhd.usgs.gov/data.html Source_Scale_Denominator: 24000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 10/24/2005 Ending_Date: Unknown Source_Currentness_Reference: map delineation Source_Citation_Abbreviation: NHD24 Source_Contribution: Hydrography footprint and flow network. Source_Information: Source_Citation: Citation_Information: Originator: Government of Canada, Natural Resources Canada, Centre for Topographic Information Publication_Date: 04/30/2001 Title: National Topographic Database (NTDB) Geospatial_Data_Presentation_Form: ESRI Shapefile Online_Linkage: ftp://ftp2.cits.rncan.gc.ca/pub/ Source_Scale_Denominator: 50000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: Unknown Ending_Date: Unknown Source_Currentness_Reference: map delineation Source_Citation_Abbreviation: CanVec Source_Contribution: Contour lines, stream centerlines, open water. Process_Step: Process_Description: Polygons were printed on frosted mylar at 1:100000 and overlaid on DRG100s on light tables. NRCS analog map of 11-digit HUCs was used to draw 11-digit Watershed boundaries. Unattributed polygons were assigned HUC_11 codes and dissolved to yield 11-digit watershed polygons. Source_Used_Citation_Abbreviation: MEDRDVD Process_Date: 1996 Process_Step: Process_Description: After review of polygon sizes against the standard and adjustments were made (approximately 300 11-digit polygons in the analog map were reduced to 175), the HUC_11 polygons were subdivided into 14-digit sub-watershed polygons and attributed with the appropriate 14-digit code. These were then dissolved to produce the HUC_14 dataset. All polygons were named after the water feature at the pourpoint. Source_Used_Citation_Abbreviation: wbd6_a_me Process_Date: 1996 Process_Step: Process_Description: Per national agreement with USGS, HUC codes were changed to 10 and 12-digits by dropping the 11th and 14th digits from the character string. Source_Used_Citation_Abbreviation: wbd6_a_me Process_Date: 2002 Process_Step: Process_Description: Converted shapefile wbd6_a_me.shp to personal geodatabase. Established topology rules of "No gaps" and "Must Not Overlap". Mosaicked DEMs, resampled to 10m where only 30m files existed. Using Spatial Analyst, built hillshades. In ArcMap, set transparency of hillshades to 40%. Draped DRG24s (50% transparent) over hillshades. Yielded enhanced 3D look for DRGs and contour lines., Source_Used_Citation_Abbreviation: wbd6_a_me Process_Date: 05/01/2007 to 01/31/2008 Process_Step: Process_Description: Mosaicked DEMs, resampled to 10m where only 30m files existed. Using Spatial Analyst, built hillshades. In ArcMap, set transparency of hillshades to 40%. Draped DRG24s (50% transparent) over hillshades. Yielded enhanced 3D look for DRGs and contour lines. Source_Used_Citation_Abbreviation: DEM10 Process_Date: 05/01/2007 to 01/31/2008 Process_Step: Process_Description: In ArcMap, set transparency of DEMs to 100%. Set property "Show Map Tips" to "On". In the Data View this showed the spot elevation at the cursor position. By moving the cursor back and forth in a ridge saddle, the user could find the lowest/highest spot for delineating the break line. Source_Used_Citation_Abbreviation: DEM10 Process_Date: 05/01/2007 to 01/31/2008 Process_Step: Process_Description: Set DRGs at 50% transparency for draping over hillshades. Source_Used_Citation_Abbreviation: DRG24 Process_Date: 05/01/2007 to 01/31/2008 Process_Step: Process_Description: From the NHD24 Hydrography Feature Dataset, used Hydro_Net_Junctions, NHDFlowline, NHDArea, and NHDWaterbody feature classes in ArcMap. Where practical, intersected polygon pourpoints with Hydro_Net_Junctions. As per standard, set pourpoints at stream junctions, lake outlets. Where main stem reaches were defined, downstream end of polygon on main stem was drawn immediately above incoming tributary pourpoint. Source_Used_Citation_Abbreviation: NHD24 Process_Date: 05/01/2007 to 01/31/2008 Process_Step: Process_Description: Acquired 50k Canadian vectors and DRGs from ftp site and added to ArcMap project. Defined watershed concept lines at small scale (1:250000), then adjusted at scale of 1:18000 and 1:24000, depending upon contour line density. Source_Used_Citation_Abbreviation: CanVec Process_Date: 12/01/2007 to 01/31/2008 Process_Step: Process_Description: Built ArcMap project file and added all reference datasets. Added Toolbars "Editor", "Advanced Editing", and "Topology". Principle tools used were Edit Topology => Reshape Edge, Modify Feature => Cut Polygon, Validate Topology in Current Extent. 100% of polygon edges were reviewed at 1:12000. Edges were reshaped at 1:4000 and 1:6000, depending upon contour line density. Pourpoints were edited at 1:3000 or larger. Source_Used_Citation_Abbreviation: wbd6_a_me Process_Date: 05/01/2007 Process_Step: Process_Description: Completed all required attributes for polygon feature class in the geodatabase (hu12_a_me). Dissolved on both Huc_10 and Huc_8 fields to produce Level 5 and Level 4 polygons and review for coding errors. After corrections, exported polygon label points to a point feature class in the same feature dataset and converted polygons to a line feature class (hu12_l_me) for attribution according to the WBD standard. After planarizing, line attributes were completed using "Selection by Location", line segments coincident with Level 5 and Level 4 polygon edges were selected and coded with the appropriate polygon level. Source_Used_Citation_Abbreviation: DRG24 Process_Date: February, 2008 Process_Step: Process_Description: After interagency review, polygon names were brought to standard, and coastal polygon organization was re-visited. All parenthetical stream reaches in the Hu_12_name attribute were eliminated, and hyphenated names were substituted to capture tributaries or co-dominant hydrographic features that might be accessed through metadata searches. Nautical Chart DRGs were used to edit and delineate Level 5 watershed boundaries along submerged channels and ridges. Freshwater and estuarine Level 6 polygons were combined into appropriate Level 5 Watersheds (example: Narraguagus River-Narraguagus Bay). Delineations at publication time do not account for the effects of ocean currents. These may be incorporated in future revisions. Source_Used_Citation_Abbreviation: Hu12_a_me Process_Date: 03/01/2008 to 05/06/2008 Process_Step: Process_Description: A set of topology rules was provided by the NRCS National Cartography & Geospatial Center. These were applied to the feature dataset, Hydrologic_Units: 1) Hu12_a_me => Must Not Have Gaps; 2) Hu12_a me => Must Not Overlap; 3) Hu12_a_me =>Boundary Must Be Covered By => Hu_l_me; 4) Hu12_l_me => Must Be Covered by Boundary Of => Hu12_a_me; 5) Hu12_l_me => Must Not Have Dangles; 6) Hu12_l_me => Must Not Self-Overlap; 7) Hu12_l_me => Must Not Self-Intersect; 8) Hu12_l_me => Must Not Have Pseudos; 9) Hu12_l_me => Must Not Overlap; 10) Hu12_l_me => Must Not Intersect Or Touch Interior; and 11) Hu12_p_me => Must Be Properly Inside => Hu12_a_me. Source_Used_Citation_Abbreviation: hu12_a_me Process_Date: 03/01/2008 to 05/05/2008 Process_Step: Process_Description: Metadata imported. Source_Used_Citation_Abbreviation: c:\temp\xml7A.tmp Process_Step: META_ID: ME02 Process_Description: The Line Mods, HU_Level, Linesource, DS codes and states were edited by USGS Water Science Center in Salt Lake City, Utah. Source_Used_Citation_Abbreviation: Process_Date: 201106 Process_Step: META_ID: ME03 Process_Description: The Line Mods, HU_Level, Linesource, DS codes and states were edited by USGS Water Science Center in Salt Lake City, Utah. Source_Used_Citation_Abbreviation: Process_Date: 201109 Process_Step: META_ID: ME04 Process_Description: USGS Water Science Center in Salt Lake City, Utah: Changes to the linework and the polys; updated the linework and the corresponding polygons, as well as the linesource codes, and downstream codes where applicable. Updated coding where applicable for new subbasins. Source_Used_Citation_Abbreviation: Process_Date: 201201 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 2711 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 5156 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 2678 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000000 Longitude_Resolution: 0.000000 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Resolution: 0.000100 Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: hu12_a_me Entity_Type_Definition: Level 6 Sub-watershed Polygons Entity_Type_Definition_Source: n/a Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Huc_8 Attribute_Definition: Level 4 Sub-basin Polygon Code. A unique 8-digit code from the USGS map series "Hydrologic Unit Maps". The same number was used in every record that pertains to a sub-watershed that resides within the same 8-digit sub-basin. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Huc_10 Attribute_Definition: Level 5 Watershed Polygon Code. This field provides a unique 10-digit code for each watershed derived from the 8-digit code. This same number was used in every record that pertains to a subwatershed that resides within the same 10-digit watershed. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Huc_12 Attribute_Definition: Level 6 Sub-watershed Polygons. This field provides a unique 12-digit code for each sub-watershed derived from the 10-digit code. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Acres Attribute_Definition: Area of subwatershed including non-contributing areas calculated to acres as a whole number, no decimals. Attribute_Definition_Source: Calculated, rounded to nearest whole number. Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: States Attribute_Definition: The "States" field includes the names of all state(s) that the sub-watershed falls within. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Ncontrb_a Attribute_Definition: Drainage areas that do not flow toward the outlet of any hydrologic unit are considered non-contributing. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_10_ds Attribute_Definition: The 10-digit code of the Level 5 hydrologic unit that is receiving the majority of the flow from the watershed that the Level 6 HU falls within. Outlets created by ditching or other artificial drainage were not considered for this field. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_10_name Attribute_Definition: Level 5 Watershed Name. A unique name for each 5th level hydrologic unit that relates to the major water feature within the polygon or the major water body it contributes to. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_10_mod Attribute_Definition: This field identifies interbasin transfers (IT), dams at outlet (DM), etc. that modify natural overland flow as modifications are identified from most significant to least significant modification(s). Hydrologic units with no modification are marked with "NM". Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_10_type Attribute_Definition: Level 5 Watershed Type Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_12_ds Attribute_Definition: Downstream Level 6 Sub-watershed. The 12-digit code of the 5th level hydrologic unit that is receiving the majority of the flow from the watershed that the 6th level HU falls within. Outlets created by ditching or other artificial drainage were not considered for this field. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_12_name Attribute_Definition: Level 6 Sub-watershed Name. A unique name for each Level 6 Sub-watershed that relates to the major water feature within the polygon or the major waterbody it contributes to. Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_12_mod Attribute_Definition: Level 6 Sub-watershed Modifications. This field identifies interbasin transfers (IT), dams at outlet (DM), etc. that modify natural overland flow as Modifications are identified from most significant to least significant modification(s). Hydrologic units with no modification are marked with "NM". Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_12_type Attribute_Definition: Level 6 Sub-watershed Type Attribute_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_10_GNIS Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Hu_12_GNIS Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Label: Shape_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: Shape_Area Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Detailed_Description: Entity_Type: Entity_Type_Label: hu12_l_me Entity_Type_Definition: Vector Line Representation of Polygon Edges Entity_Type_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Attribute: Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Attribute: Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Federal Standards for the Delineation of Hydrologic Unit Boundaries Codeset_Source: Please refer to the Entity and Attribute Overview for valid values Detailed_Description: Entity_Type: Entity_Type_Label: hu12_p_me Entity_Type_Definition: Level 6 Sub-watershed Label Points Entity_Type_Definition_Source: Federal Standards for Delineation of Hydrologic Unit Boundaries Overview_Description: Entity_and_Attribute_Overview: This is a description of attributes by field from the Federal Standards for Delineation of Hydrologic Unit Boundaries 1) Polygon attributes Huc_8 : Eight Digit Hydrologic Unit Code - (REQUIRED) A unique 8-digit code from the USGS map series "Hydrologic Unit Maps". The same number was used in every record that pertains to a sub-watershed that resides within the same 8-digit sub-basin. Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. Huc_10: Ten Digit Hydrologic Unit Code - (REQUIRED) This field provides a unique 10-digit code for each watershed. This same number was used in every record that pertains to a sub-watershed that resides within the same 10-digit watershed. Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. Huc_12: Twelve Digit Hydrologic Unit Code - (REQUIRED) This field provides a unique 12-digit code for each Level 6 Sub-watershed. Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. Acres: Acres - (REQUIRED) Area of sub-watershed including non-contributing areas calculated to acres as a whole number, no decimals. The "Acres" field was calculated from the "Area" field. States: States - (REQUIRED) The "States" field includes the names of all state(s) that the sub-watershed falls within. The 2-digit postal abbreviation in upper case and in alphabetical order was used, separated with a comma. Ncontrb_a: Non-Contributing Area - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) Drainage areas that do not flow toward the outlet of any hydrologic unit are considered non-contributing. If a non-contributing area is on the boundary between two or more hydrologic units, the non-contributing area is associated with the hydrologic unit adjacent to the low point on the boundary. This attribute should be the total of the non-contributing areas within a hydrologic unit calculated in acres. NOTE: No non-contributing areas were denoted in this Maine dataset. Hu_10_ds: Level 5 Downstream Hydrologic Unit Code - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) This field has the 10-digit code of the 5th level hydrologic unit that is receiving the majority of the flow from the watershed that the 6th level HU falls within. Outlets created by ditching or other artificial drainage were not considered for this field. If an HU flows into an ocean or the Gulf of Mexico, this field was populated with "OCEAN" and if a HU flows into one of the Great Lakes the term "LAKE" was used. If a HU flows across international borders, "CANADA" or "MEXICO" was used depending on which country the HU drains into. If an HU is a closed basin, then the term "CLOSED BASIN" was used. Hu_10_name: Fifth Level Hydrologic Unit Name - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) This field used officially recognized names only. This field was populated by following the directions in subsection 6.3 "Watershed and Sub-watershed Naming Protocol". The name used to attribute the watershed was used only once within a 4th level unit. Hu_10_mod: Fifth Level Hydrologic Unit Modifications - (REQUIRED) This field identifies any type of modifications to natural overland flow that alters the location of the hydrologic unit boundary for a 10-digit watershed. This field shows the most significant to least significant modification(s) to the watershed boundary. One or more of the following abbreviations was used. SC - Stormwater Canal or Drainage Canal ID - Irrigation Ditch IT - Interbasin Transfer BC - Barge Canal or Navigation Canal SD - Stormwater Ditch PD - Pipe Diversion CD - Channel Diversion NC - Noncontributing Area KA - Karst LE - Levee NM - No Modifications OC - Overflow Channel or Flume DM - Dam at outlet or HU boundary GC - General Canal/Ditch PS - Pumping Station DD - Drainage Ditch SI - Siphon AD - Aqueduct RS - Reservoir TF - Transportation Feature (road, railroad, docks etc.) GF - Ground-Water Flow MA - Mining Activity UA - Urban Area GL - Glacier IF - Ice Field OF - Overbank Flow OT - Other Hu_10_type: Fifth Level Hydrologic Unit Type - (REQUIRED) This field was populated with the hydrologic unit type from the list provided that most closely identifies the watershed. S - "Standard" hydrologic unit - Any land HU with drainage flowing to a single outlet point, excluding non-contributing areas. This includes areas or small triangular wedges between adjacent HU's that remain after classic hydrologic units are delineated. Some examples include "true", "classic", "composite", and "remnant" hydrologic units. C - "Closed Basin" hydrologic unit - A drainage area that is 100% non-contributing. This means all surface flow is internal, no overland flow leaves the hydrologic unit through the outlet point. F - "Frontal" hydrologic unit - Areas along the coastline of lakes, oceans, bays, etc. that have more than one outlet. These HU's are predominantly land with some water areas at or near the outlet(s). M - “Multiple Outlet” hydrologic unit An area that has more than one natural outlet; for example, an outlet located on a stream with multiple channels. This does not include frontal or water hydrologic units, hydrologic units with artificial interbasin transfers, drainage outlets through karst or ground-water flow, or outlets that cross a stream with an island. This code should be used only in rare instances. W - "Water" hydrologic unit - Hydrologic units that are predominantly water with adjacent land areas, ex. lake, estuaries, harbors. I - "Island" hydrologic unit - A hydrologic unit that is one or more islands and adjacent water out to the toe of the shore face. U - "Unclassified" hydrologic unit - A hydrologic unit that can't be defined or doesn't fit into one of the types that have been listed. Hu_12_ds: Sixth Level Downstream Hydrologic Unit Code - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) This field was populated with the 12-digit code of the 6th level hydrologic unit that is receiving the majority of the flow from the sub-watershed. Outlets created by ditching or other artificial drainage were not considered for this field. If a HU flows into an ocean or the Gulf of Mexico it was populate with "OCEAN" and if a HU flows into one of the Great Lakes the term "LAKE" was used. If a HU flows across international borders, "CANADA" or "MEXICO" was used depending on which country the HU drains into. If an HU is a closed basin, this field was populated with the term "CLOSED BASIN". SPECIAL NOTE FOR MAINE COASTAL WATERSHEDS: Where Level 5 Watersheds contain freshwater river systems and an estuary, Level 6 Sub-watershed code values ranged from the lowest numbers at the headwaters to the highest at the receiving marine waters. A typical construct looks like this: Headwaters and tributaries => Frontal Drainages => Offshore Islands => Estuary/Bay. Hu_12_name: Sixth Level Hydrologic Unit Name - (FIELD REQUIRED, ATTRIBUTES OPTIONAL) Officially recognized names were used in this field. This field was populated by following the directions in subsection 6.3 "Watershed and Sub-watershed Naming Protocol". The name used to attribute the sub-watershed was used only once within a 4th level unit. Hu_12_mod: Sixth Level Hydrologic Unit Modifications - (REQUIRED) This field identifies any type of man-made modification(s) to natural overland flow that alters the location of the hydrologic unit boundary for a 12-digit sub-watershed. One or more of the following abbreviations was chosen for this field. SC - Stormwater Canal or Drainage Canal ID - Irrigation Ditch IT - Interbasin Transfer BC - Barge Canal or Navigation Canal SD - Stormwater Ditch PD - Pipe Diversion CD - Channel Diversion NC - Noncontributing Area KA - Karst LE - Levee NM - No Modifications OC - Overflow Channel or Flume DM - Dam at outlet or HU boundary GC - General Canal/Ditch PS - Pumping Station DD - Drainage Ditch SI - Siphon AD - Aqueduct RS - Reservoir TF - Transportation Feature (road, railroad, docks etc.) GF - Ground-Water Flow MA - Mining Activity UA - Urban Area GL - Glacier IF - Ice Field OF - Overbank Flow OT - Other Hu_12_type: Sixth Level Hydrologic Unit Type - (REQUIRED) This field was populated with the hydrologic unit type from the list provided that most closely identifies the sub-watershed. S - "Standard" hydrologic unit - Any land HU with drainage flowing to a single outlet point, excluding non-contributing areas. This includes areas or small triangular wedges between adjacent HU's that remain after classic hydrologic units are delineated. Some examples include "true", "classic", "composite", and "remnant" hydrologic units. C - "Closed Basin" hydrologic unit - A drainage area that is 100% non-contributing. This means all surface flow is internal, no overland flow leaves the hydrologic unit through the outlet point. F - "Frontal" hydrologic unit - Areas along the coastline of lakes, oceans, bays, etc. that have more than one outlet. These HU's are predominantly land with some water at or near the outlet(s). M - “Multiple Outlet” hydrologic unit An area that has more than one natural outlet; for example, an outlet located on a stream with multiple channels. This does not include frontal or water hydrologic units, hydrologic units with artificial interbasin transfers, drainage outlets through karst or ground-water flow, or outlets that cross a stream with an island. This code should be used only in rare instances. W - "Water" hydrologic unit - Hydrologic units that are predominantly water with adjacent land areas, ex. lake, estuaries. I - "Island" hydrologic unit - A hydrologic unit that is one or more islands and adjacent water out to the toe of the shore face. U - "Unclassified" hydrologic unit - A hydrologic unit that can't be defined or doesn't fit into one of the types that have been listed. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: GIS Coordinator Contact_Organization: USDA-NRCS Contact_Address: Address_Type: mailing address Address: 967 Illinois Avenue, Suite 3 City: Bangor State_or_Province: ME Postal_Code: 04401 Country: USA Contact_Voice_Telephone: 207-990-9100, ext. 3 Contact_Electronic_Mail_Address: ray.voyer@me.usda.gov Contact_Instructions: please e-mail with data requests. Resource_Description: Downloadable Data Distribution_Liability: The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in Maine. USDA-NRCS makes no claims for the data's suitability for other purposes. USDA-Natural Resources Conservation Service-Maine should be acknowledged as the data source in products derived from these data. The Maine Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. The Natural Resources Conservation Service will not perform any evaluations of these maps or purposes related solely to State or local regulatory programs. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data from the source distributor. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: CD Transfer_Size: 82.3 mb Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://lighthouse.nrcs.usda.gov/gateway/gatewayhome.html Fees: none Metadata_Reference_Information: Metadata_Date: 20080728 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: GIS Coordinator Contact_Organization: USDA-NRCS Contact_Address: Address_Type: mailing address Address: 967 Illinois Avenue, Suite 3 City: Bangor State_or_Province: ME Postal_Code: 04401 Country: USA Contact_Voice_Telephone: 207-990-9100, ext. 3 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile