What is ISO 17123-9 - testing geodetic and surveying instruments about?
ISO 17123-9 is a safety standard on the field procedures for testing geodetic and surveying instruments.
ISO 17123-9 specifies field procedures for determining and evaluating the precision (repeatability) of terrestrial laser scanners and their ancillary equipment when used in building, civil engineering, and surveying measurements. Primarily, these tests are intended to be field verifications of the suitability of a particular instrument for the immediate task at hand and to satisfy the requirements of other standards.
ISO 17123-9 can be thought of as one of the first steps in the process of evaluating the uncertainty of measurements (more specifically of measurands).
Who is ISO 17123-9 - testing geodetic and surveying instruments for?
ISO 17123-9 on field procedures for testing geodetic and surveying instruments is relevant to:
- Manufacturers and suppliers of of terrestrial laser scanners
- Manufacturers of optical instruments
- Civil engineers
- Land surveyors
- Others involved in engineering and construction projects
- Quality control teams
Why should you use ISO 17123-9 - testing geodetic and surveying instruments?
An optical instrument is a device that processes light waves, either to enhance an image for viewing or to analyze and determine its characteristic properties. Primarily, these tests are intended to be field verifications of the suitability of a particular instrument for the immediate task. With the introduction of uncertainty in measurement in ISO 17123 (all parts), it is intended to finally provide a uniform, quantitative expression of measurement uncertainty in geodetic metrology with the aim of meeting the requirements of users.
ISO 17123 (all parts) provides not only a means of evaluating the precision (experimental standard deviation) of an instrument but also a tool for defining an uncertainty budget, which allows for the summation of all uncertainty components, whether they are random or systematic, to a representative measure of accuracy, i.e., the combined standard uncertainty.
ISO 17123 (all parts) therefore provides, for defining for each instrument investigated by the procedures, a proposal for additional, typical influence quantities, which can be expected during practical use.
ISO 17123-9 specifies field procedures for adoption when determining and evaluating the uncertainty of measurement results obtained by geodetic instruments and their ancillary equipment when used in building and surveying measuring tasks.
ISO 17123-9 helps to ensure that on-location measurements are precise, and this, in turn, influences the precision of construction. These field procedures have been developed specifically for in situ applications without the need for special ancillary equipment and are purposely designed to minimize atmospheric influences.
