ILRISIntelligent Laser Ranging and Imaging System (trademark of Optech, Inc.)
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This situation was due to the fact that the Ilris 3D equipment has been designed for long distance surveys, up to 1200 meters on an object with 80% reflectance, which, in surveys in short distances, makes the laser pulse too intense, giving a response that cannot be used to differentiate rocks.
The point clouds from both surveys were preprocessed in the PARSER software in order to convert the Ilris 3D raw.
Another factor to consider is that due to the wavelength of 1535 nanometers from the Ilris 3D, in the mid-infrared range, there is a small penetration of the laser in areas where the rock is affected by lichens or thin weathering crusts.