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A Geographic Information System (GIS) requires efficient methods to store, organize, manage, analyze, and retrieve spatial as well as non-spatial data. Different data models have been developed to represent geographic features and their associated attributes. Among the most important are the Georelational Data Model, Object-Based Data Model, and Geodatabase, each offering distinct approaches to managing geographic information according to the complexity and requirements of GIS applications. The Georelational Data Model is one of the earliest and most widely used GIS data models. It separates spatial data from attribute data while maintaining a connection between them through a common identifier. In this model, spatial information is stored in graphic files _________ ________ __________ ______ __________ ___ ______ __________ _________ _______ _________.
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