**1. Introduction**

The aim of this study is to explore the model of open spatial data between communities and official government to meet bottom-up and top-down approaches in achieving consensus of marine spatial planning for strengthening democracy and sustainability, particularly in social pillar. The social problem between local coastal communities and coastal developers gives attention for the sustainability of coastal and marine resources. Discussions were held in the neighborhood until it was agreed to do an open spatial data by all coastal communities who still maintain the local traditional culture with technical assistance from the Indonesian Ministry of Maritime Affairs and Fisheries. An agreement was reached from the preparation of spatial data as to how the community then utilized the spatial information for the purpose of protecting and managing coastal and marine resources in Indonesia.

Managing sustainability of marine and coastal resources, it is recognized that the crucial process in open spatial data is a change in the way people think about the use of natural resources, so that they are not damaged and depleted. The people who initially thought that marine resources were not their property finally realized that in fact they had allowed the destruction process because they have not exercised control when there were parties who used it excessively, such as investors who develop coastal areas for massive business activities. The development of local knowledge led the community to try to organize themselves by forming groups which were then used as a part of essential actor for negotiating and mapping the use of coastal areas through a legal context in the form of Indonesian marine spatial planning.
