Teknik Cepat Identifikasi Lahan Terbuka Melalui Citra Multi Temporal dan Multi Spasial (Quick Tecniques in Indentifying Open Area by the Use of Multi Spatial and Multidate Imageries)

This study describes the use of multitemporal principal component analysis (MPCA) and vegetation index<br />differencing (VIDN) techniques in identifying open area on post-coal-mining sites using multi spatial and multidate<br />of Landsat TM and SPOT 4 XS imageries. The study revealed that the synthetic images derived from stable<br />brightness, stable greenness,s and delta brightness of MPCA summarize information on post-coal-mining opened<br />areas provided overall accuracy of 76.47% for the new ex mining area and 32.69% for old ex mining area. The<br />VIDN method provided relatively lower accuracy than those from MPCA i.e. 58.87% for new ex mining and<br />13.25% for old ex-mining areas. The study also concluded that identifying open area on post-coal-mining sites<br />using imageries was more efficient than using only ground survey, providing cost efficiency of 29%. This<br />indicates that the cost required using satellite image is only 29% of the cost required for ground survey. The<br />study concluded that MPCA is better than VIDN for identifying open area on post-coal-mining sites.