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An enterprise GIS is a geographic information system that is integrated throughout an entire organization. This intergration allows for a large number of users to manage, share, and use spatial data and related information to address a variety of needs, including data creation, modification, visualization, analysis, and dissemination.  An enterprise GIS is a long-term or permanent creation in contrast to a Project GIS, which is a specially designed GIS that is used for a single project.
There are four general steps to building an enterprise GIS:
1. Determine the needs of the organization
2. Decide on data design such as organization, layout, metadata, etc.
3. Acquire the necessary data. This can be done through gathering in-situ data or copying the data others have compiled.
4. Building applications for and maintaining the database.
Enterprise GIS model also differs from Project GIS in data structure.
- Wade, T. and Sommer, S. eds. A to Z GIS
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