129 
Table 2. Results of threshold classification for CP #140, #29 and #32 
UNIT #29 
NUMBER OF PIXELS 
INSIDE MANUALLY 
TRACED AREAS 
CLASS A* 
CLASS B** 
SUB-TOTAL 
LANDINGS 
ROADS 
SKIDROADS 
211(0.26%) 
2219(2.70%) 
562(0.68%) 
1169(1.42%) 
1112(1.36%) 
3260(3.97%) 
1380(1.68%) 
3331(4.06%) 
3822(4.65%) 
OUTSIDE MANUALLY 
TRACED AREAS 
452(0.55%) 
7849(9.56%) 
8301(10.11%) 
SUB-TOTAL 
3444(4.19%) 
13390(16.31%) 
16834(20.50%) 
UNCLASSIFIED PIXELS 
65282(79.50%) 
TOTAL 
82116(100.0%) 
UNIT #32 
NUMBER OF PIXELS 
INSIDE MANUALLY 
TRACED AREAS 
CLASS A 
CLASS B 
SUB-TOTAL 
LANDINGS 
ROADS 
SKIDROADS 
443(0.57%) 
4843(6.26%) 
267(0.35%) 
969(1.25%) 
541(0.70%) 
2118(2.74%) 
1412(1.82%) 
5384(6.96%) 
2385(3.09%) 
OUTSIDE MANUALLY 
TRACED AREAS 
388(0.50%) 
9938(12.84%) 
10326(13.34%) 
SUB-TOTAL 
5941(7.68%) 
13566(17.53%) 
19507(25.21%) 
UNCLASSIFIED PIXELS 
57886(74.79%) 
TOTAL 
77393(100.0%) 
* "Class A" - "deeply gouged or exposed compacted mineral soil"; 
** "Class B" - "exposed mineral soil or possibly woody debris".