AASHTO MP 47:2021 Standard Specification for File Format of Two-Dimensional and Three-Dimensional (2D/3D) Pavement Image Data.
This specification describes the standard file format of two-dimensional (2D) and three- dimensional (3D) pavement image data used to determine pavement surface condition and profiles.
This specification describes the data elements stored in a binary file.
This specification is designed to be independent of hardware platform. computer language. and operating system.
This standard does not purport to address all the safety concerns. if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
REFERENCED STANDARDS
A Si Al Standard:
• E867, Terminology Relating to Vehicle-Pavement Systems
2.2. IEEE Standard:
• IEEE 754. IEEE Standard for Floating-Point Arithmetic
TERMINOLOGY
Definitions:
3.1.1. Terminology used in this specification conforms to the definitions included in ASTM E867.
3.2. Definitions of Terms Specific to This Standard:
3.2.1. array:
3.2.1.1. array (numeric data tipe)—Sequence of data of the specified numeric data type. The size of the array will be stored separately.
3.2.1 .2. array (string)—ASCII strings separated by null characters. A null character follows the last string.
3.2.2. bit depth—Number of binary digits (bits) used to represent a value of image intensity or range.
3.2.3. compatibility:
3.2.3.1. backward compatihilitv—Ability of a software system, such as a pavement image viewer, to read an earlier version of the standard file format.
32.3.2. forward coinpanhilitv—Abilily of a software system, such as a pavement image viewer, to read a future version of’ the standard file format.
3.2.4. coinpression—Mcthod to reduce image size by encoding information into fewer bits than the original representation.
3.2.4.1. lossless compression—Cornprcssion method in which no information is lost.AASHTO MP 47 pdf download.