Managing Data Layer Updates

Thursday, August 26, 1993
Data maintenance is often an expensive yet neglected aspect of managing GIS data. Each data layer is unique and will have its own system for making and tracking updates. By consequence, tools for data maintenance are generally not built into GIS software. This guideline contains a collection of techniques and procedures for managing GIS data layer updates. Appropriate techniques can be adopted (with modification as need be) for a given data layer. Some data layers change very little over time, and may only require simple procedures for reporting errors and making rare revisions. Other layers change often and require procedures for recording updates in a manner that supports quality control and tracking of changes over time. A full range of techniques is discussed here, including methods which enable an audit trail of modifications over time for a given feature. The text is primarily intended for those familiar with the Arc/Info GIS software.
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