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Functional Subsystems. Functional Subsystems. A GIS has four main functional subsystems. These are: Data Input Subsystem Data Storage and Retrieval Subsystem Data Manipulation and Analysis Subsystem Output/ Display Subsystem. Functional Subsystems.
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Functional Subsystems • A GIS has four main functional subsystems. These are: • Data Input Subsystem • Data Storage and Retrieval Subsystem • Data Manipulation and Analysis Subsystem • Output/ Display Subsystem