Dron assisted geological mapping: cerro de san cristóbal, Hidalgo
Abstract
Unmanned Aerial Vehicles (UAV) or drones allow the acquisition of centimetric-resolution land images in short time and low cost. Consequently, their use in geological mapping has proliferated as the images can be integrated into ortho mosaics for interpretation and generation of reliable and inexpensive geologic cartography, in comparison to traditional mapping. In this article, the photointerpretation of 101 ha in the east sector of Cerro de San Cristóbal (north of Pachuca, Hidalgo) is presented, using images with a 10 cm resolution. Mapped area is dominated by extremely abrupt topography, with a range of elevation around 400 m. The work to produce the geologic map, involved 8 hours of fieldwork (flight with a DJI Inspire I Pro drone) and 18 hours of office work (image processing and photointerpretation). On the map, three lithologic units and high-angle faults were identified, suggesting that, effectively, the use of drones is ideal in the preliminary identification of geological features, more than in traditional mapping.
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