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Characterization of pavement texture by use of surface profiles - Determination of megatexture Ingestion-build-201039 ISO 21105‑1 is the first1 Scope This part of ISO 13473 specifies procedures for determining the average depth or level of pavement surface megatexture by measuring the profile curve of a surface and calculating megatexture descriptors from this profile. The technique is designed to give meaningful and accurate measurements and descriptions of pavement megatexture characteristics for various purposes. Since there is an overlap between megatexture and the surrounding ranges,