Worldwide Impact Assessment of spatial data clearinghouses to society

Many countries, states and regions throughout the world have spent considerable resources over the past few years debating optimal Spatial Data Infrastructures (SDI). One of the main elements of these infrastructures is the clearinghouse for spatial data (Crompvoets, et. al., 2004). This clearinghouse is the access network of a SDI, which facilitates access to the spatial data. Additionally, it provides complementary services, improves the exchange and sharing of spatial data and services between suppliers and users. One of the main reasons to build clearinghouses is to enhance the availability and accessibility of spatial data for the formulation, implementation and evaluation of policies valid for specific area.