The Future of Spatial Data Infrastructures
In this paper, the authors address two central questions relating to the future of Spatial Data Infrastructures (SDIs); where have the user got to now? and where should go from here? The answers to the first question are to be found in a review of the main milestones of SDI development over the last two decades and a comparative evaluation of SDI experiences in different parts of the world which constitutes the first main section of the paper. The answers to the second question are inevitably more speculative in nature.