Spatial Data Infrastructures (SDI) are coordination instances that have been implemented at different hierarchical levels, from the local, national, continental and even academic or corporate levels, however, their development and maturity is still heterogeneous. This article reviews the concept of Spatial Data Infrastructures, SDI evaluation methodologies, and proposes improvements to the current SDI evaluation carried out in the Americas by the Regional Committee of United Nations on Global Geospatial Information Management for the Americas (UN-GGIM: Americas).