Generally, attribute information will indicate the source and extent of the edgematching problem where it exists. Annotation Two methods are used to annotate features in the database. Where the features are explicitly described in the database with a point, line, or polygon, the annotation is generally included as an attribute. Generally if an attribute existed describing the feature, then no annotation is supplied for it. The starting point of the annotation generally indicates the location of the feature.
Attributes describe characteristics of each sheet.