NORTH COAST 24K ROADS
               ==================================

COVERAGE NAME: NCROADS

FEATURE TYPE: LINE
   
SOURCE: 1:24,000 SCALE USGS DLG AND USFS CFF

MINIMUM MAPPING UNIT: 1:24,000

AREAL EXTENT: CALIFORNIA NORTH COAST (APPROX RWQCB REGION 1)
		*Data available by River Basin for download
		follows the naming convention: roads_w(shed number)
		ex: roads_w1
		See Basin List below:


DATE OF LAST UPDATE: 4/13/01


  COVERAGE DESCRIPTION:
  
The 'ROADS' layer is based on the Forest Service's CFF (Cartographic Feature File) and USGS DLG transportation linework derived from the DLG-3 digital series. CFF's are based on 1:24000 source maps. The library layer contains DLG linework as it came from USGS, plus edited and new linework. Edits included corrections of coding and additions, deletions and alterations of linework. This layer contains a second-generation arc attribute table derived from the DLG major/minor pair scheme. The derived table is fully defined in this document. The original coding can be made available upon request. DLG coding is documented in "Digital Line Graphs From 1: 24,000-Scale Maps, Data Users Guide 2, 1985" available from the U.S. Department of the Interior,   U.S. Geological Survey, Reston, Virginia.
  
The roads layer contains several classes of transportation features including jeep trails, city streets, thoroughfares, unpaved roads, state highways, and interstates. Some of the data is 20 years old; therefore, care should be taken when using data from areas that have grown in recent years. The currency of the State highway system (those for which Caltrans has responsibility) is very good, having been updated in 1993. 


DATA DICTIONARY:
  
      DATAFILE NAME: NCROADS.AAT
  

  COLUMN   ITEM NAME WIDTH    OUTPUT   TYPE     N.DEC 
  ---------------------------------------------------

   1       FNODE#        4         5      B        -
   5       TNODE#        4         5      B        -
   9       LPOLY#        4         5      B        -    
  13       RPOLY#        4         5      B        -     
  17       LENGTH        8        18      F        5     
  25       ROADS#        4         5      B        -     
  29       ROADS-ID      4         5      B        -     
  36       SOURCE        3         3      C        -
  36       MINOR1        6         6      I        -
  42       MINOR2        6         6      I        -
  48       MINOR3        6         6      I        -
  54       MINOR4        6         6      I        -
  60       MINOR5        6         6      I        -

 
  
  FNODE# : The id number of the node feature that represents
           the beginning point (the From NODE) of the arc.

  TNODE# : The id number of the node feature that represents
           the ending point (To NODE) of the arc.

  LPOLY# : The <coverage name># id of the polygon that lies to the
           left of this arc when facing in the direction of the
           TNODE.

           This is blank since there is no polygon topology. 


  RPOLY# : The <coverage name># id of the polygon that lies to the
           right of this arc when facing in the direction of the
           TNODE.

           This is blank since there is no polygon topology. 

  LENGTH : The length of the arc in coverage units.

ROADS# : The software-assigned unique integer identification number.

  ROADS-ID : A user-assigned identification number.
  
SOURCE : The source of the numeric codes indicated in Minor1 through 
		Minor5.
 	
MINOR1 : A name for a numeric code indicated within the DLG or the 
	     CFF user's guide. 	

MINOR2 : A name for a numeric code indicated within the DLG or the 
	     CFF user's guide.		

MINOR3 : A name for a numeric code indicated within the DLG or the 
	     CFF user's guide.

MINOR4 : A name for a numeric code indicated within the DLG or the 
	     CFF user's guide.

MINOR5 : A name for a numeric code indicated within the DLG or the 
	     CFF user's guide.
	     


Note : Refer to the source item to find the origin of the minor codes 
	   within the CFF or DLG User's Guide.
    

 ADDITIONAL PROCESSING NOTES:
 The CFF and DLG codes were migrated to reflect the minor codes. 
 

 
 
CONTACT:   Eric Spry (916) 227-2668



                     COORDINATE SYSTEM DESCRIPTION

Projection               UTM Zone 10
Units                    METERS             Spheroid      CLARKE1866
Parameters:


Basin   Basin Name
--------------------------------
1      'Albion River'
2      'Big River'
3      'Cape Mendocino'
4      'Eureka Plain'
5      'Garcia River'
6      'Gualala River'
7      'Lower Eel River'
8      'Lower Klamath River'
9      'Lower Trinity River'
10     'Mad River'
11     'Middle Fork Eel River'
12     'Middle Klamath River'
13     'Middle Main Eel River'
14     'Middle Trinity River'
15     'Navarro River'
16     'North Fork Eel River'
17     'Noyo River'
18     'Point Arena'
19     'Redwood Creek'
20     'Rockport'
21     'Russian River'
22     'Salmon River'
23     'Scott River'
24     'South Fork Eel River'
25     'Shasta Valley'
26     'Smith River'
27     'South Fork Trinity River'
28     'Trinidad'
29     'Upper Main Eel River'
30     'Upper Trinity River'
31     'Van Duzen River'

DOCUMENTATION DATES:

   January, 2002:     Reprojected to UTM NAD27 (no shift), and clipped to KRIS Project study area.  

   Contact Name:       P. J. Trichilo
                       Institute for Fisheries Resources (IFR)
                       791 Eighth Street
                       Arcata, CA  95521

   Contact's Phone:    (707) 822-9428