Lithuanian spatial information infrastructure: 20 years of evolution, milestones, costs and benefits

Abstract. The paper presents the outline of development of the Lithuanian SDI from its initial idea in 2002 to the functional and mature system in 2022. The aspects of organizational co-ordination, spatial competencies and impact on the development of the society are briefly discussed. Evaluation of maturity of the SDI is evaluated using original method and presented in an aggregated form for the five milestones of the SDI development timeline. Economic and social benefits and accuracy of prognoses is retrospectively evaluated using actual numbers of users and use cases. Impact of new framework data services, new administrative services and provision of open data is demonstrated by different indicators of growth of use of the SDI. Future trends and threats are discussed.