عنوان مقاله [English]
A spatial data infrastructure (SDI) is the technology, policies, standards and related activities necessary to acquire, distribute, use and preserve spatial data. An SDI is a coordinated series of agreements on technology standards, institutional arrangements, and policies that enable the discovery and use of geospatial information by users and for purposes other than those it was created for. Modeling and simulation can facilitate the development of SDI system in different level. This study aims to model the development of local SDI in defensive organization using the system dynamics technique. In this regard, the spatial data management parameters were identified and then three indicators; data security, spatial data standardization and participation units were determined. The indicators were simulated by Vensim software and model validation tests were done using by three categories of model Validation: Structural, structural-oriented behavior and behavior pattern tests. These models can be analyzing the system behavior in different conditions. The results show that the priority of the indicators for planning and policy-making are data security, participation units and then defensive spatial data standardization. At the end the important scenarios for each index and strategies to improve them were presented in the defensive organization in the medium term future.