The row total shows water and other land use/land cover area
in square kilometers derived from MODIS, similarly for Landsat ETM+ via column. Each cell value shows the agreement/
disagreement of MODIS with Landsat ETM+ results.
Tables 2–4 and Fig. 3 show underestimation of 18.26% for
NDWI and overestimation of 1.75% and 7.76% for RSWIR
and GSWIR respectively, while j (it is a measure of overall
agreement of a matrix) for NDWI, RSWIR and GSWIR is
measured to be 46.66%, 70.80% and 60.61% respectively.
Overall accuracy, producer’s accuracy (it is a measure of
how well a certain area is classified), user’s accuracy (it is a
measure of how much the results, obtained through producer’s
accuracy, are reliable) and kappa coefficient of NDWI,
RSWIR and GSWIR for water and other land use/cover
(Fig. 3) clearly depict in detail that RSWIR is relatively more
accurate in delineating water bodies.