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There is a strong hierarchical relationship among different political/administrative levels of SDI concepts. Based on this hierarchical relationship a pyramid of building blocks can be formed by taking a perspective that starts at a local level and proceeds through state, national and regional levels and is completed by developing a Global Spatial Data Infrastructure (GSDI). Therefore, it is argued that by better understanding and demonstrating the nature of this hierarchical relationship, GSDI development can gain support from a wider community of both government and non-government data users and providers.