Metadata management and revision history tracking for spatial data and GIS map figures

This paper describes how Bechtel maintains metadata for both spatial data and GIS map figures, and how revision histories of each are tracked in an enterprise-level Oracle Spatial database via a set of customized GIS metadata management tools. First of all, Bechtel has adopted a standardized data model called Spatial Data Standard for Facilities, Infrastructure, and Environment (SDSFIE) and has developed standard workflows and procedures around it for data cataloging, processing, and deployment in an enterprise Oracle Spatial geodatabase environment. Secondly, Bechtel has adopted the concept of feature level metadata, i.e., each feature or geometry also carries metadata. Thirdly, Bechtel keeps up-to-date the relationship between map figures and spatial data. Lastly, Bechtel has developed a set of GIS automation tools for metadata management, making otherwise a very time consuming process totally manageable. The capability of keeping track of revision history for both spatial data and map figures enables Bechtel to rapidly and accurately respond to requests for information from the clients regarding changes of spatial data and map figures, resulting in quick turnaround and significant cost savings.