In the SuperMap Chart Module, a characteristic Object Type can be uniquely determined by an object code (or abbreviation) and a Dataset Type, that is, a characteristic object Dataset is determined. The same object may have different Geometry types. For example, the lakeshore (LAKSHR) may be linear or planar. If the lakeshore of two geometry types exists in the same chart at the same time, it will be stored as a Line Dataset and a Region Dataset respectively. Each type of feature object is stored in the corresponding feature object Dataset, so before drawing a certain type of object, it is necessary to create or Append the corresponding feature object Dataset.

The operations of the feature object Dataset provided include: creating a new feature object Dataset, deleting a feature object Dataset, and appending a record to the feature object Dataset.

Executive summary:

This section describes the specific operation of creating a feature object Dataset in an editable group.

This section describes the specific operation of adding the existing feature object Dataset Information to the editable group.