Chart features are stored in the form of feature datasets, serving as crucial data units in chart production. During the data processing phase of chart creation, operations such as feature creation, appending, searching, and identification are key steps.

In the chart data storage structure, each feature code (or abbreviation) combined with a dataset type determines a specific object type. This structure supports flexible management of features with various geometry types. For example:

• Lakeshore (LAKSHR) features can exist in two geometric forms:
  • Linear Symbol lakeshores are stored in line datasets.
  • Areal lakeshores are stored in region datasets.

When a chart contains the same feature with different geometry types, corresponding feature datasets need to be created separately. To draw specific types of features, you need to create or append corresponding feature datasets in advance.

This section covers:

• Create Feature Dataset: Explains how to create feature datasets in an editable chart group.
• Append Features: Describes how to append existing feature data to an editable chart group.
• Search Feature: Demonstrates how to quickly query feature objects in charts based on specific criteria.
• Recognize Feature: Explains how to identify feature objects in charts loaded onto the map.