Badlands National Park: Accuracy Assessment Matrix

Table 7.� Contingency table (error matrix) for BADL vegetation mapping accuracy assessment.

						Reference Data (Accuracy Assessment Class)																	Total N	Comission Error % Correct	90% Confidence Interval
	Map Unit	1	2	12	14	15	16-	17	18	21	25	31	32	33	34	35	37	38	39	41	42	43-			90% Confidence Interval
	Code						19															44			-	+
S	1	13					1																14	92.9	73.9	99.3
a	2		64			1	1						1			1							68	94.1	97.0	91.2
m	12			2																			2	100	31.6	100
p	14				22		2										1			1			26	84.6	70.1	93.1
l	15					14	8		3														25	56.0	38.9	74.5
e	16-19	1		3	2	3	102	5	10	4					1								131	75.0	78.7	71.3
	17						8	15	1	1													25	60.0	39.0	75.4
D	18						7	1	17	1													26	65.4	46.0	79.1
a	21									9						1							10	90.0	64.8	99.0
t	25										3									1			4	75.0	32.0	97.4
a	31											14							2	1			17	82.4	63.6	93.3
	32						1						8										9	88.9	60.9	98.8
(M	33																						0	NA	-	-
a	34									1					5								6	83.3	45.8	98.3
p	35						1				2					7	2		1				13	53.8	27.6	75.4
	37				1										1		5						7	71.4	31.6	92.1
C	38																						0	NA	-	-
l	39																						0	NA	-	-
a	41																			6			6	100	65.5	100
s	42														2					2	15		19	78.9	61.3	90.5
s)	43-44																			1		48	49	98.0	95.8	100
	Total N	14	64	5	25	18	131	21	31	16	5	14	9	0	9	9	8	1*	3	12	15	48	458
�																							Total Correct = 369
Omission Error
% Correct�		92.9	100	40.0	88.0	77.8	77.9	71.4	54.8	56.3	60.0	100	88.9	NA	55.6	77.8	62.5	0*	0	50.0	100	100

90% Confidence Interval
-		73.9	92.0	11.2	74.5	58.1	82.0	54.2	63.7	30.5	24.7	83.7	60.9	-	23.2	48.5	25.5	0	0	27.1	84.6	85.5
+		99.3	100	75.3	95.5	89.9	73.8	87.0	45.9	76.5	88.8	100	98.8	-	79.0	93.9	85.3	90.0	53.6	72.9	100	100
OVERALL TOTAL ACCURACY =� 80.6 %
OVERALL KAPPA INDEX = 78.2%
OVERALL TOTAL ACCURACY 90% UPPER AND LOWER CONFIDENCE INTERVAL =�																+	82.4	%		-	78.8	%

* Represents 1 AA point taken for class 38.� This point was mapped�															(Map unit combinations of 16 -19 and 43-44 were used for the
incorrectly as a land-use class (reservior).� This point is included in�															�A.A. since classes 19 and 43 were only seperated as a Park�
the total sample size (N) and is used to calculate Overall Total Accuracy.�															management concern, on a "where known basis".)

(Omission and Commision errors were calculated using total accuracy)��

	Key to Map Class Codes

	1	Prairie Dog Town Community											37	Western Snowberry Shrubland
	2	Badlands Sparse Vegetation Complex											38	Sandbar Willow Temporarily Flooded Shrubland
	12	Switchgrass Grassland											39	Greasewood / Western Wheatgrass Shruband
	14	Emergent Wetland											41	Eastern Cottonwood - (Peachleaf Willow) / Sandbar Willow Woodland
	15	Little Bluestem - Grama Grasses - Threadleaf Sedge Grassland											42	Green ash - (American Elm) / Chokecherry Woodland
	16	Western Wheatgrass Herbaceous Alliance											43	Ponderosa Pine / Rocky Mountain Juniper Woodland
	17	Introduced Grassland											44	Rocky Mountain Juniper / Littleseed Ricegrass Woodland
	18	Blue Grama Grassland											50	Rivers - Perennial
	19	Western Wheatgrass - Green Needlegrass Grassland											51	Transportation, communication, and Utilities
	21	Soapweed Yucca / Prairie Sandreed Shrub Grassland											52	Croplands and Pastures
	25	Silver Buffaloberry Shrubland											53	Seeded Mixed Grass Prairie
	31	Silver Sagebrush / Western Wheatgrass Shrubland											54	Other Agricultural Land
	32	Sand Sagebrush / Prairie Sandreed Shrubland											55	Streams and Canals
	33	Rabbitbrush Shrubland											56	Reservoirs
	34	Chokecherry - (American Plum) Shrubland											57	Beaches and Sandy Areas Other Than Beaches
	35	Three-leaved Sumac / Threadleaf Sedge Shrub Grassland											58	Strip Mines. Quarries, and Gravel Pits