Landsat 5 Thematic Mapper (TM) data, path 129 row 51
was used in this study. A near infrared band (band 4; 0.76–
0.90 mm) and a short-wave infrared band (band 5; 1.55-1.75
mm) were extracted from original TM data sets because of
their vegetation/land cover characterization. Topographic
maps from RTSD (Royal Thai Survey Department) at
1:50,000 were used as reference.