科研之友
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摘要
We studied the applicability of SPOT (Systeme Probatoire d'Observation de la Terre) 6 satellite imagery for red sandstone interpretation in the heavily loess-covered northern Baoji District, China, which is always a crucial but challenging issue in remote sensing geological mapping. First, the non- or sparsely vegetated subareas were outlined in order to narrow the interpretation target area; second, band-math and the fractal DN-N (digital number-frequency) algorithm was conducted to extract the sandstone-associated anomalies; third, a series of spatial analysis, for example, overlaying and clumping, was employed for elimination of the false anomalies; finally, we took advantage of matched filtering to discern the non- (red) sandstone outcrops in local areas. Generally, the interpretation accuracy based on this novel technical proposal is acceptable74% or slightly less (taking the geological sketch as reference criteria)and can be well proven by field investigation. This study may have contributed a useful case study for remote-sensing lithological mapping in the Quaternary-covered areas.
- 出版日期2018-3
- 单位中国地质科学院地球物理地球化学勘查研究所; 长安大学
