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ACCURACY OF THE 1992 NATIONAL LAND COVER DATASET AREA ESTIMATES: AN ANALYSIS AT MULTIPLE SPATIAL EXTENTS
Citation:
HOLLISTER, J. W., J. F. PAUL, J. L. COPELAND, M. L. GONZALEZ, AND P. V. AUGUST. ACCURACY OF THE 1992 NATIONAL LAND COVER DATASET AREA ESTIMATES: AN ANALYSIS AT MULTIPLE SPATIAL EXTENTS. Presented at North American Land Cover Summit, Washington, DC, September 20 - 22, 2006.
Description:
Abstract for poster presentation:
Site-specific accuracy assessments evaluate fine-scale accuracy of land-use/land-cover(LULC) datasets but provide little insight into accuracy of area estimates of LULC
classes derived from sampling units of varying size. Additionally, accuracy of landscape structure metrics calculated from area estimates cannot be determined solely
from site-specific assessments. We used photointerpreted LULC data from Rhode Island and Massachusetts as reference to determine the accuracy of area measurements
from the National Land Cover Dataset (NLCD) within spatial units ranging from 0.1 to 200 km2. When regressed on reference area, NLCD area of developed land, agriculture, forest, and water had positive linear relationships with high Rr2, suggesting acceptable accuracy. However, many of these classes also displayed mean differences (NLCD - REFERENCE), and linear relationships between the NLCD and reference were not one-to-one (i.e.. low R2, À0 0, À1 1), suggesting mapped area is different from true area.