An integrated approach for extraction of lithology information using the SPOT 6 imagery in a heavily Quaternary-covered region—North Baoji District of China

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 acceptable—74% 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.

RED Engineering sees ‘strong opportunities’ for growth in 2018 on the back of innovative engineering solutions

UK engineering services firm RED Engineering sees ‘strong opportunities’ in the offshore oil and gas sector for firms with capacity to deliver innovative fast track projects.
Despite the volatility of oil markets, continuing uncertainty over Brexit and pressure on costs, business development director Toby Bailey predicts that demand for leading-edge subsea technologies will remain robust over the next 12 months.