Klamath National Forest
                     Geographic Information System
                          Theme Documentation

                                       Revision Date: November 1996

Theme:               Historic Fire Perimeters



Disclaimer:          
*********************************************************************-
****
                     The Klamath National Forest cannot assure the 
                     reliability or suitability of this information 
                     for a particular purpose.  Original data was 
                     compiled from various sources.  Spatial 
                     information may not meet National Map Accuracy 
                     Standards.  This information may be updated 
                     without notification.
                     ***********************************************-
                     *************************

Project Name:        KNF Base Layer

                      IDENTIFICATION INFORMATION

Coverage Extent:     Forest-wide
Source:              Ranger District Fire Atlases
Last Update:         May 1995
Primary Feature Type:Polygon
Other Feature Types: 
Distribution Limitations:     None
Data Resolution:     1:24000
Projection:          UTM Zone 10

Comments:            Fire perimeters were obtained from 1:126720 
                     Ranger District Fire Atlases.  Polygons were 
                     ocularly transferred to 1:62500 manuscripts.

                     District Atlases contain all fires > 40 acres in 
                     size.

                     Dates covered:
                     All districts, 1950 to present
                     Salmon River,  1911 to present
                     Goosenest, 1914 to present
                     Beaver Creek watershed (Oak Knoll RD), 1920 to 
                     present                          SOURCE INFORMATION

Source System:       Arc/Info
Source Scale:        1:126720
Source Projection:   UTM Zone 10
Capture Method:      scanner

                         CUSTODIAN INFORMATION

Contact Organization:KNF Supervisor's Office
Resource Contact:    Jay Perkins, Fire Management Staff
Phone:916-842-6131  Email:  
Address:              1312 Fairlane Road
                      Yreka, CA  96097


GIS Contact:         Dianne Torpin, KNF Supervisor's Office, GIS 
Staff
Phone:916-842-6131  Email:  
Address:             1312 Fairlane Road
                     Yreka, CA  96097


                        PROCESSING INFORMATION

Theme Generation:    

Lineage:             

For more detailed information, see the Edit Log for this theme.                         ATTRIBUTE INFORMATION
=====================================================================-
==

System Software:    Arc/Info

Table Name:.PAT
============================================
Item Name:                 data  Item Type:           char Item 
Length:   30

 Item Value                 Description

eg. 87012317099             Concatenations of 5-character strings, 
                            where the first two characters represent 
                            the year in which the fire occurred and 
                            the remaining 3 characters are the 
                            incident number.  Where overlaps occur 
                            (area burned multiple times), the string 
                            is extended, with the most recent fire 
                            always occupying the first position in the 
                            string.
                            The example string above can be 
                            interpreted as Incident# 99 occurring in 
                            1917, reburned in 1987 as incident# 123

Item Name:         y1, y2, etc.  Item Type:integer, redefined    Item 
Length:   2

 Item Value                 Description

eg. 87                      Year in which fire occurred


Item Name:       yc1, yc2, etc.  Item Type:char, redefined Item 
Length:   2

 Item Value                 Description

eg. 87                      Year in which fire occurred, expressed as 
                            a character string.  Useful for coverage 
                            labeling purposes, so that polygons 
                            containing no data show as null, rather 
                            than "0".  Example:  polygontext 
                            fire_perim yc3|yc2|yc1EDIT LOG

NOTE:  Data is screwed up, in that fire #'s (item DATA) should
list most recent fire first (eg, 8700153102).  It appears that
87 fire info is okay this way, but all others are backwards!
-RAV 4/11/96

=====================================

FIRES0496
---------

Updated fires within Beaver Cr. Watershed for fires 1922-1950.
Manuscripted @ 1:24000 by Jeff Keiser.

FIRES1095
---------

Large historic fires from 1950-1976.
Manuscripted to 1:63360 scale from Individual Fire Reports
(Form 5100-29) and District Fire Atlases in the
spring of 1992 by Jeff Keiser & Bruce Detrick. 
Scanned at the Rogue and vectorized by ArcScan
in the spring 0f 1995.

Updated with Hog fire layer, Dillon (Jack#1) 94 layer, and 
Specimen 94 layer.  Neilon fire updated with 87 fire layer.

Updated with Salmon River fires from 1911-1950, manuscripted
by Jeff Keiser in 1992.  No fire numbers were assigned to these.

Updated with pre-1950 fires for Goosenest.  Fire numbers are
assigned to some but not all polygons.