ISO 19161-1

Working Group 4 
Reference Status/Date Name WG

ISO 19161-1:2020

2020-01-24 Geographic information — Geodetic references —
Part 1: International terrestrial reference system (ITRS)

ISO/PWI 19161

Geographic information — Geodetic references 4



This document provides the basic information and the requirements related to the International Terrestrial Reference System (ITRS), its definition, its realizations and how to access and use these realizations.

This document:

  • describes ITRS following the definitions and terminology adopted by the International Union of Geodesy and Geophysics (IUGG), the International Association of Geodesy (IAG) and the International Astronomical Union (IAU);
  • describes different categories of ITRS realizations: its primary realization, labelled the International Terrestrial Reference Frame (ITRF), other existing realizations of reference systems that are mathematically derived from the ITRS, and realizations that are aligned to the ITRF, such as GNSSspecific reference frames;
  • categorizes procedures for realizing the ITRS.


Document Normative References:

There are no normative references in this document.


Referenced from active ISO/TC 211 standard:


Model References:


Supporting the following Sustainable Development Goals: