Table 2: LULC classification system and the number of training data (polygons/pixels) used in the research.

First level classesSecond level classesTraining data: number of polygons (pixels)
200020092015

CroplandPaddy18 (3641)21 (2969)17 (3684)
Dry land43 (7489)57 (9793)64 (10792)
Irrigation land35 (3919)51 (4643)57 (7686)

WoodlandForest50 (4113)39 (4347)52 (7150)
Shrub29 (2852)30 (8171)27 (6396)
Other forests26 (4194)27 (3969)31 (5370)

GrasslandDense grass34 (5085)31 (3573)29 (5936)
Moderate grass32 (3005)32 (3005)26 (5933)
Sparse grass33 (2369)34 (2671)35 (8244)

Water bodyRivers and lakes24 (5379)18 (4682)21 (6118)
Tidal20 (1181)19 (1340)25 (1835)

Built-up landUrban built-up15 (1877)10 (3312)10 (4385)
Rural settlements40 (3846)37 (3527)40 (4548)

Unused landSandy land31 (7993)31 (9423)46 (16651)
Salina22 (3121)22 (3121)19 (2913)
Swampland11 (1588)9 (560)5 (742)
Bare43 (1837)50 (3283)37 (3909)