Surficial hydrography developed for the Salt River Basin at a 1:24,000 scale. The layer encompasses part or all of 15 USGS 7.5' quadrangles in western Wyoming, eastern Idaho. Hydrography was developed from US Forest Service Cartographic Feature File (CFF) data. There are two INFO files that can be associated to hydrography using dynamic segmentation. These files are CROSSES and REACHES. Linework and polygon features are attributed with CFF, DLG (Major/Minor) and WWRC hydrographic coding as well as polygon and line feature names identified on USGS quadrangles. Linework is not network capable (no centerlines through polygon features or directionality correction). Purpose: The purpose of this data layer is to provide a base hydrography layer for the Salt River Basin. However, the data may be used for multiple purposes for lands within the Salt River Basin. Range_of_Dates/Times: Beginning_Date: 1966 Ending_Date: 1980 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: Revisions as needed. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -111.125 East_Bounding_Coordinate: -110.75 North_Bounding_Coordinate: 43.25 South_Bounding_Coordinate: 42.5 Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: Availability of 1:24,000 hydrography in Wyoming. Browse_Graphic_File_Type: gif Access_Constraints: none Use_Constraints: This data should never be used at a scale larger than 1:24,000. The data and corresponding attributes are only as accurate as the source maps from which they were obtained, and may vary depending upon the date and method of acquisition. Contact_Person: Data Manager Spatial Data and Visualization Center Box 4008 University Station Laramie, Wyoming 82071-4008 307-766-2751 Hours_of_Service: 8:00 5:00 MST Data_Set_Credit: Kevin Toohill, Wyoming Water Resources Center; United States Forest Service / Bridger Teton National Forest; Geomatronics Service Center (GSC); Larry Warren, Bridger Teton National Forest. Native_Data_Set_Environment: The data is stored in Arc/Info 7.0.4 software for Unix operating system. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No ground accuracy assessment was conducted for the database. Approximately 80% of attribute information was obtained from the original CFF developed through the Geomatronics Service Center in Salt Lake City, Utah in cooperation with the National Forest Service. This data was checked for accuracy by comparing coding with USGS 7.5' quadrangle linework. Ditch/aqueduct arcs were identified and attributed using information from quadrangle linework including naming conventions ("Ditch", "Canal", etc.), non-natural linework form (straight, crossing, or equal-elevation hydrographic arcs), and perennial/intermittent designation. Approximately 20% of linework and attribute information was obtained from USGS 7.5' quadrangles. Attributes were checked for consistency with quadrangle linework. Logical_Consistency_Report: All polygons are closed and contain only one label point and attribute. Duplicate lines have been removed and all linework has been edgematched at quadrangle boundaries. Linework is missing where USGS 7.5' quadrangle shows 'marsh' polygon features. Completeness_Report: Hydrography linework is complete for all or portions of 15 7'5' quadrangles. This linework includes the Salt River Basin up to the watershed boundary on the east and up to the quadrangle boundary on the Idaho, western side. Stream and lake CFF, DLG (Major/Minor), and WWRC attributes are available for all linework. Hydrographic feature names for USGS coded streams and lakes are complete only for the stream segments specifically used in this study. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Data produced through the Geomatronics Service Center were initially derived from USGS 7.5' series quadrangle maps. The CFF vector file was generated to reproduce features within 0.005" of their location on the source map. This error corresponds to +/- 10 ft (approx. 3 m) ground error. Overall horizontal positional accuracy cannot be greater than the national mapping accuracy standards for the USGS source maps, +/- 40 ft (approx. 13 m) ground distance. Snapping and coordinate shift tolerances were maintained at 2 m or less throughout editing. Total horizontal positional accuracy is therefore better than +/- 100 ft for all linework. Lineage: Source_Information: Source_Citation: Citation_Information: Title: Cartographic Feature Files Originator: Geomatronics Service Center/US Forest Service Publication_Date: unknown Source_Scale_Denominator: 24000 Type_of_Source_Media: paper map, field validation/addition Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1965 Ending_Date: 1980 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: CFF Source_Contribution: Hydrography linework and polygon feature labels Process_Step: Process_Date: 1996 Process_Description: Import raw data. 80% of the Cartographic Feature File (CFF) data was obtained from Bridger-Teton National Forest during March, 1996. CFF data was converted by Bridger-Teton National Forest to ARC/Info format and hydrography line and point/label features were extracted before shipment to the WWRC (currently held by SDVC). The remaining 20% of the data was obtained directly from Geometronics Data Center in February, 1998. The data was converted to ARC/Info format hydrography line and point/label features were extracted. Process_Step: Process_Date: 1998 Process_Description: Edgmatching linework. CFF linework was edgematched along quadrangle boundaries manually using the ARCEDIT module. Corresponding arc segments were connected at an approximate midpoint of endpoint node coordinates. ARC/INFO EDGEMATCHING ARCtool was used. Process_Step: Process_Date: 1998 Process_Description: Topology generation and polygon attributing. Network (line and polygon) topologic structure was generated using the ARC CLEAN function. Polygon labels were derived from CFF point/label features. Label errors were identified and corrected, resulting in one unique label per polygon. Polygon features with unclosed portions (reservoirs and lakes at river inflow/outflow points) were closed using screen digitization. Process_Step: Process_Date: 1998 Process_Description: Network topology correction. Linework topology was manually checked and corrected to ensure arc and polygon connectivity where indicated on USGS 7.5' source maps. Missing linework was noted. Stream direction was NOT checked/corrected. Process_Step: Process_Date: 1998 Process_Description: Final topology generation and check. The appended coverage was topologically-corrected using the ARC CLEAN function. Arc and polygon topology was checked manually and corrected. Process_Step: Process_Date: 1996 Process_Description: Feature name addition. Stream and lake feature names were added to the line and label features where identified on USGS 7.5' quadrangles. All arc segments were attributed with feature names (where applicable). Process_Step: Process_Date: 1997 Process_Description: Addition of DLG (Major/Minor) and WWRC hydrography attributes. Modification of CFF attributes. USGS Digital Line Graph attributes were added to the line and polygon features according to USGS standards. Two DLG Minor attributes were added and populated using existing CFF attribute data and USGS-defined coding relationships. Five original CFF attributes were reduced to two CFF fields representing primary hydrography coding of linework. A single WWRC HYDROCODE attribute was added to polygon and line features. Process_Step: Process_Date: 1997 Process_Description: Split linework and add USGS quadrangle identification attribute. The hydrography linework (including polygon arcs) were split along quadrangle boundaries using the ARC IDENTITY command with the LINE option. A 1:24,000 quadrangle coverage with a USGS quadrangle ID attribute was used as the identity coverage. All attributes except the USGS_QD_ID were deleted from the linework database. Process_Step: Process_Date: 1998 Process_Description: Split linework and add federal land ownership attributes, sub-basin attributes and state name attributes. Using the ARC INTERSECT command with the LINE option the hydrography linework were split along land ownership boundaries and state boundaries. The hydrography linework was then clipped using the watershed boundary for the Salt River Basin. All attributes except ADMN_TYPE1, STATE_NAME and SUBBASE-NAME were deleted from the linework database. Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 12-13 Transverse_Mercator: Scale_Factor_at_Central_Meridian: .09996 Longitude_of_Central_Meridian: -107 Latitude_of_Projection_Origin: 0.0 False_Easting: 0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 1 Ordinate_Resolution: 1 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The arc attribute file contains these items: >HYDROCODE >1=perennial stream, >2=intermittent stream >3=ditch/aqueduct >CFF >402=perennial stream >403=perennial stream,double line >405= intermittent stream >410=perennial lake or pond >412=intermittent lake or pond >413=reservoir, natural shoreline >416=perennial canal/aqueduct/ditch >417=intermittent canal/aqueduct/ditch >CFF2 >423=underground aqueduct/penstock >424=aqueduct,tunnel >425=elevated aqueduct/penstock >435=disappearing/reappearing stream >DLGMINOR1 >0200=shoreline, 0412 = stream, 0414=ditch or canal >DLGMINOR2 >0200=shoreline >0202= closure line >0602=overpassing >0604=tunnel >0605=right bank >0606=left bank >0610=intermittent HYDRONAME- Feature names from USGS 7.5' quadrangle series >SOURCE- Source of hydrography linework >1= digitized at WWRC >2=Cartographic Feature File >USGS_QD_ID: USGS 7.5' quadrangle identification code (Block groups) >DWTRSTAT - Identifies the dewater status of the stream >frequently = stream is frequently dewatered during the year >infrequently = stream is infrequently dewatered during the year >seldom= stream is seldom dewatered during the year >never = the stream is never dewater during the year The polygon attribute file contains these items: >HYDROCODE >0 = non-hydrographic polygon >1=perennial lake >2= intermittent lake) >CFF1 (402=perennial stream, 410=perennial lake/pond, 412=intermittent lake/pond, >413=reservoir) >CFF2 (410= perennial lake/pond) >DLGMINOR1 (412= stream, 421=lake or pond) >DLGMINOR2 (610=intermittent) >HYDRONAME: Feature names from USGS 7.5' quadrangle series >SOURCE (1=digitized at WWRC, 2=CFF, 4=WWRC/CFF) >ADMN_TYPE1: Identifies if the property is owned by the federal government or not. Identifies the type of property holding (e.g. national forest or grassland) >STATE_NAME: Name of the state the water body is located in. >SUBBASE-NAME: Name of the sub-basin that the water body is located in Entity_and_Attribute_Detail_Citation: Cartographic Feature File code documentation and vintage attributes can be obtained from the Geometronics Service Center (GSC), ATTN: Data Library, 222 West 2300 South, Salt Lake City, UT, 84119. (801) 975 3440. Digital Line Graph (DLG) code documentation can be obtained from the USGS. ftp://mapping.usgs.gov/pub/ti/DLG/dlgstnds/ Metadata_Reference_Information: Metadata_Date: 199808 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Margo Berendsen Contact_Address: Address_Type: mailing address Address: Box 4008 University Station City: Laramie State_or_Province: Wyoming Postal_Code: 82071 Country: USA Contact_Voice_Telephone: 307-766-2751 Contact_Electronic_Mail_Address: meh@uwyo.edu Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998