Wild trout range map for SAA area at 1:2,000,000 SAA Version 3.0 Version Date: 3/21/96 ------------------------------------------------------------ Identification Information Data Layer Name: trout_rn Wild trout range map for SAA area at 1:2,000,000 Description: This data layer includes the wild trout range boundary for the Southern Appalachian Assessment area. Keywords: trout, range Citation: Flebbe, Patricia - Southeastern Research Station, USDA Forest Service, Blacksburg VA Digitized version produced by D.H. Yankee. 1995. Integrated Assessment Team, Tennessee Valley Authority Native Data Set Environment: Unix; ARC/INFO 7.0.3 pathname: //trout.e00.Z Scale: 1:2,000,000 File Format: ARC/INFO polygon coverage Use Restrictions: Data set must be cited when used. Access Restrictions: none ------------------------------------------------------------ Spatial Reference Information Datum: North American Datum 1983 (NAD83) Precision: single Projection: Albers Equal Area Units: meters Spheroid: WGS-84 1st Std Parallel: 34 00 00 2nd Std Parallel: 38 00 00 Central Meridian: -82 00 00 Origin: 33 00 00 False Northing: 0.0 False Easting: 0.0 Extent: West Bounding Coord.: -253592.339 East Bounding Coord.: 341700.656 North Bounding Coord.: 730476.812 South Bounding Coord.: 165337.495 Distance Resolution: unknown Vertical Resolution: n/a ------------------------------------------------------------ Data Quality Information Thematic Accuracy: unknown Confidence: unknown Accuracy Method: unknown Horizontal Accuracy: unknown Confidence: unknown Accuracy Method: unknown Vertical Accuracy: n/a Logical Consistency: Completeness: ------------------------------------------------------------ Source Information Source Material: Organization: Date: Distance Resolution: unknown Contribution: Source Material: Organization: Date: Distance Resolution: unknown Contribution: Source Material: Organization: Date: Distance Resolution: unknown Contribution: ------------------------------------------------------------ Processing History Information Process Description: 1. Numerous aquatic professionals who were very familiar with aquatic fauna of the southern Appalachians were surveyed as to their opinions on the range of wild trout in the SAA area. They were asked to sketch on to 1:2,000,000 county maps what they believed was the range of wild trout. These opinions were collected by Patrica Flebbe and from these maps, a single range map was interpolated. 2. TVA's Integrated Assessment team digitized the boundary off of a 1:2,000,000 SAA county map. Much of the northern range boundary is derived from the 1:2,000,000 SAA boundary. The coverage was cleaned with a dangle length of 0.01 and a fuzzy tolerance of 0.001. ------------------------------------------------------------ Entity/Attribute Information Entity: TROUT.PAT Definition: wild trout range polygons Attributes: COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC DEFINITION 1 AREA 8 18 F 5 area in meters2 per polygon 9 PERIMETER 8 18 F 5 perimeter in meters per polygon 17 TROUT_RN# 4 5 B - internal polygon i.d. number 21 TROUT_RN-ID 4 5 B - user-defined i.d. number 25 STATUS 1 1 C - trout status code 26 STATUS2 7 7 C - 33 HECTARES 8 8 I - area in hectares per polygon Entity: TROUT_RN.TIC Definition: trout coverage control tics Attributes: COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC DEFINITION 1 IDTIC 4 5 B - User-defined i.d. number 5 XTIC 8 18 F 5 X coordinate for tic 13 YTIC 8 18 F 5 Y coordinate for tic Entity: TROUT_RN.BND Definition: trout coverage bounding coordinates Attributes: COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC Definition 1 XMIN 8 18 F 5 Minimum x-coordinate 9 YMIN 8 18 F 5 Minimum y-coordinate 17 XMAX 8 18 F 5 Maximum x-coordinate 25 YMAX 8 18 F 5 Maximum y-coordinate ------------------------------------------------------------ Status Information Data Set Status: Available Release Date: ------------------------------------------------------------ Metadata Reference Information Date: March 21, 1996 Review Date: March 21, 1996 Contact: Dennis H. Yankee, TVA ------------------------------------------------------------ Distribution Information Distribution Contact: Distribution Liability: File Compression Technique: UNIX compress, Arc/Info export format Transfer Size: ------------------------------------------------------------ Contact Information Contact Person: Dennis H. Yankee Contact Mail Address: Tennessee Valley Authority 17 Ridgeway Rd. Norris, TN 37828 Contact Phone: (423)-632-1541 Contact Fax: (423)-632-1541 Contact email: dyankee@mhs-tva.attmail.com ------------------------------------------------------------