Hopewell Furnace National Historic Site: Accuracy Assessment Matrix

Table 3. �Results of thematic accuracy assessment sampling at Hopewell Furnace National Historic Site.

	Alliance-Level Vegetation Map Designation
Accuracy assessment observation	Acer rubrum - Fraxinus pennsylvanica seasonally flooded forest alliance	Cephalanthus occidentalis seasonally flooded shrubland	Dactylis glomerata�Rumex acetosella herbaceous alliance	Eastern Red Cedar woodland	Liriodendron tulipifera forest alliance	Modified Successional Forest	Quercus alba � (Quercus rubra, Carya spp.)� forest alliance	Quercus prinus � (Quercus coccinea, Quercus velutina) forest alliance	Quercus rubra� Quercus prinus woodland alliance	Vaccinium formosum� Vaccinium fuscatum seasonally flooded shrubland alliance	Total	Percent Correct
Acer rubrum�Fraxinus pennsylvanica seasonally flooded forest alliance	9										9	100
Cephalanthus occidentalis seasonally flooded shrubland		1									1	100
Dactylis glomerata�Rumex acetosella herbaceous alliance			8								8	100
Eastern Red Cedar woodland				1							1	100
Liriodendron tulipifera forest alliance	1				5		1				7	71.43
Modified Successional Forest					2	3					5	60
Quercus alba�(Quercus rubra, Carya spp.) forest alliance							10	1			11	90.91
Quercus prinus�(Quercus coccinea, Quercus velutina) forest alliance								4			4	100
Quercus rubra�Quercus prinus woodland alliance									1		1	100
Vaccinium formosum� Vaccinium fuscatum seasonally flooded shrubland alliance										5	5	100
Total	10	1	8	1	7	3	11	5	1	5	52
Percent correct	90	100	100	100	71.43	100	90.91	80	100	100
								Total Points Correct��				47
								Percent correct			90.38%
								Kappa Index			88.77%
								90% C.I. for Kappa Index				� 8.16%