This study aims to assess and to evaluate band ratios, brovey and HSV (Hue-Saturation-Value) techniques for discrimination and mapping the basement rock units exposed at Wadi Bulghah area, Saudi Arabia using multispec...This study aims to assess and to evaluate band ratios, brovey and HSV (Hue-Saturation-Value) techniques for discrimination and mapping the basement rock units exposed at Wadi Bulghah area, Saudi Arabia using multispectral Landsat ETM+ and SPOT-5 panchromatic data.?FieldSpec instrument is utilized to collect the spectral data of diorite, marble, gossan and volcanics, the main rock units exposed at the study area. Spectral profile of diorite exhibits very distinguished absorption features around 2.20 μm and 2.35 μm wavelength regions. These absorption features lead to lowering the band ratio values within the band-7 wavelength region. Diorite intrusions appear to have grey and dark grey image signatures on 7/3 and 7/2 band ratio images respectively. On the false color composite ratio image (7/3:R;7/2:G and 5/2:B), diorite, marble, gossan and volcanics have very dark brown, dark blue, white and yellowish brown image signatures respectively. Image fusion between previously mentioned FCC ratio image and high spatial resolution (5 meters) SPOT-5 panchromatic image is carried out by using brovey and HSV transformation methods. Visual and statistical assessment methods prove that HSV fused image yields best image interpretability results rather than brovey image. It improves the spatial resolution of the original FCC ratios image with acceptable spectral preservation.展开更多
2013年2月12日,美国从加利福尼亚州的范登堡空军基地（Vandenberg AIR Force Base,California）成功发射了Landsat 8陆地卫星。Landsat 8是为了纪念陆地卫星系列发射40周年（1972～2012,图1）而制订的陆地卫星数据连续性发射LDCM（Lands...2013年2月12日,美国从加利福尼亚州的范登堡空军基地（Vandenberg AIR Force Base,California）成功发射了Landsat 8陆地卫星。Landsat 8是为了纪念陆地卫星系列发射40周年（1972～2012,图1）而制订的陆地卫星数据连续性发射LDCM（Landsat DATA Continuity Mission）产物。其运载工具为宇宙神-5火箭（Atlas-Vrocket）。展开更多
文摘This study aims to assess and to evaluate band ratios, brovey and HSV (Hue-Saturation-Value) techniques for discrimination and mapping the basement rock units exposed at Wadi Bulghah area, Saudi Arabia using multispectral Landsat ETM+ and SPOT-5 panchromatic data.?FieldSpec instrument is utilized to collect the spectral data of diorite, marble, gossan and volcanics, the main rock units exposed at the study area. Spectral profile of diorite exhibits very distinguished absorption features around 2.20 μm and 2.35 μm wavelength regions. These absorption features lead to lowering the band ratio values within the band-7 wavelength region. Diorite intrusions appear to have grey and dark grey image signatures on 7/3 and 7/2 band ratio images respectively. On the false color composite ratio image (7/3:R;7/2:G and 5/2:B), diorite, marble, gossan and volcanics have very dark brown, dark blue, white and yellowish brown image signatures respectively. Image fusion between previously mentioned FCC ratio image and high spatial resolution (5 meters) SPOT-5 panchromatic image is carried out by using brovey and HSV transformation methods. Visual and statistical assessment methods prove that HSV fused image yields best image interpretability results rather than brovey image. It improves the spatial resolution of the original FCC ratios image with acceptable spectral preservation.
文摘2013年2月12日,美国从加利福尼亚州的范登堡空军基地（Vandenberg AIR Force Base,California）成功发射了Landsat 8陆地卫星。Landsat 8是为了纪念陆地卫星系列发射40周年（1972～2012,图1）而制订的陆地卫星数据连续性发射LDCM（Landsat DATA Continuity Mission）产物。其运载工具为宇宙神-5火箭（Atlas-Vrocket）。
