Reference geodata are a core asset to produce comparable indicators about the place we live in, at different granularities, from local scales to the planet. This is particularly true for the indicators of the United Nations Agenda 2030, specific quantitative measures associated with the 17 Sustainable Development Goals. Historical geodata can be used to compute indicators back in time and grasp the dynamics of the underlying phenomena. It requires specific methodologies to cope with it because of its heterogeneities, and also specific expertise to discover, process and interpret it. Approaches have been developed to valorise historical and time stamped geodata to contribute to compute sustainable indicators back in time and are presented in this report. Some have now reached a certain maturity. Beside technology, an important stake is to engage with all legitimate stakeholders and to define the appropriate governance and partnership to improve the usage of historical geodata to reach Sustainable Development Goals.