The baseline (or reference) is the state against which change is measured.
In the context of Land Degradation Neutrality (LDN), the initial (t0) estimated value of each of the indicators used to monitor progress in the achievement of LDN for each land type. The baseline values of these indicators are measured at the time of implementation of the LDN conceptual framework.
(Source: IPCC, 2014: Annex II: Glossary [Mach, K.J., S. Planton and C. von Stechow (eds.)]. In: Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the