SIDS Small Island Developing States can use GSTM=Geocoded Spatial Transparency Metric to map local resources including food, fresh water, corals, mangroves and fish stocks. SIDS mapped using GSTM can form platform for spatial thinking K12 in an effort towards best practices in choices in sustainable development. Fresh water intrusion by sea level rise damages food plants on SIDS. Rio 2012 adopts GSTM to promote education for sustainable development. and ecological resilience.