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Indicator E.a. - Maps and Data for the Report on the West Cascades Mapping Region
 
Figure 2. Forest type based on dominant species. 
Figure 3. Size classes. 
Figure 4. Amount of forested area in each size class by dominant tree species. 
Figure 5. Percent canopy cover of all live trees. 
Table 2. Summary statistics of the diversity of forest types. 
 
 

Figure 2. Forest type based on dominant species.
 
Figure 2. GNN map of forest type based on dominant species for the West Cascades mapping region. 


 
Map Legend and Data for Figure 2
Dominant Species
Hectares (Acres) x 1000
Percent of Total
Forested Area
 Douglas-fir
1620 (4003)
59.84
Mountain hemlock
248 (612)
9.16
Western hemlock
186 (459)
6.86
White fir
121 (299)
4.47
Lodgepole pine
118 (292)
4.37
Pacific silver fir
96 (238)
3.56
Shasta red fir
80 (199)
2.97
Ponderosa pine
50 (124)
1.86
Western redcedar
33 (81)
1.22
Noble fir
31 (77)
1.15
Other species
123 (304)
4.50
 Regenerating forest
42 (103)
1.51
 
 
Printable map and data file [jpg; 495 KB]

 
 
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Figure 3. Size classes.
 
Figure 3. GNN Map of six categories of size classes for the West Cascades mapping region. 


 
Map Legend and Data for Figure 3
Size Class
Hectares (Acres) x 1000
Percent of Total
Forested Area
 Shrub/Seedling
QMDA_DOM <2.5 or CANCOV <10
43 (106)
1.5
 Sapling/Pole  
QMDA_DOM <=2.5 and <25.0
693 (1711)
24.0
Small tree
QMDA_DOM <=25.0 and <37.5
625 (1544)
21.6
Medium tree
QMDA_DOM <=37.5 and <50.0
451 (1115)
15.6
Large tree
QMDA_DOM <=50.0 and <75.0
673 (1663)
23.2
Giant tree
QMDA_DOM >=75.0
264 (652)
9.1
 
QMDA_DOM represents the quadratic mean diameter (in centimeters) or the dominent tree species.  CANCOV represents canopy cover estimated from the Forest Vegetation Simulator.
 
 
Printable map and data file [jpg; 500 KB]

 
 
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Figure 4. Amount of forested area in each size class by dominant tree species.
 
Figure 4. Amount of forested area in each size class displayed by dominant tree species for the West Cascades mapping region. 


*Forest areas represented by the "Other Species" category include red alder, bigleaf maple, incense-cedar, grand fir, Engelmann spruce, Oregon white oak, subalpine fir, Pacific madrone, giant chinquapin, California black oak, western white pine, aspen, knobcone pine, Pacific yew, willow, and black cottonwood.
 
 
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Figure 5. Percent canopy cover of all live trees.
 
Figure 5. Percent canopy cover of all live trees in the West Cascades mapping region. 
 
 

Map Legend and Data for Figure 5
Canopy Cover Class
Hectares (Acres) x 1000
Percent of Total
Forested Area
 Less than 10%
80 (199)
2.9
 10% to 40%
211 (522)
7.7
 40% to 70%
646 (1597)
23.5
 Greater than 70%
1810 (4474)
65.9
 
 
Printable map and data file [jpg; 448 KB]

 
 
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Table 2. Summary statistics of the diversity of forest types.
 

Species
Average
Percent
Canopy
Cover
Area
Hectares (Acres)
Percent
of Total
Forest Area
Number of
Forest
Subtypes
 Douglas-fir
70.14
1,619,921 (4,002,912)
59.84
32
 Mountain hemlock
84.38
247,860 (612,476)
9.16
12
 Western hemlock
78.87
185,691 (458,853)
6.86
9
 White fir
60.88
120,920 (298,800)
4.47
15
 Lodgepole pine
51.77
118,190 (292,054)
4.37
11
 Pacific silver fir
82.16
96,360 (238,112)
3.56
11
 Shasta red fir
73.95
80,336 (198,516)
2.97
8
 Ponderosa pine
42.15
50,350 (124,419)
1.86
15
 Western redcedar
74.13
32,936 (81,387)
1.22
7
 Noble fir
68.45
31,180 (77,046)
1.15
8
 Red alder
35.35
23,709 (58,586)
0.88
7
 Bigleaf maple
26.57
17,286 (42,716)
0.64
4
 Incense-cedar
53.30
16,735 (41,353)
0.62
9
 Grand fir
69.88
16,220 (40,080)
0.60
5
 Engelmann spruce
61.53
10,282 (25,408)
0.38
5
 Oregon white oak
7.91
7,896 (19,512)
0.29
6
 Subalpine fir
73.23
6,274 (15,504)
0.23
5
 Pacific madrone
26.10
5,927 (14,647)
0.22
6
 Giant chinquapin
29.68
5,025 (12,416)
0.19
3
 California black oak
17.46
4,174 (10,314)
0.15
6
 Western white pine
16.16
2,392 (5,910)
0.09
2
 Aspen
20.74
2,237 (5,529)
0.08
1
 Knobcone pine
21.60
1,683 (4,158)
0.06
1
 Sugar pine
66.76
1,272 (3,142)
0.05
3
 Pacific yew
33.06
968 (2,391)
0.04
1
 Willow
00.01
655 (1,619)
0.02
1
 Black cottonwood
72.77
508 (1,255)
0.02
1
  
 
 
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