HPD supports two types of relationships between features:
• A feature relationship is a hierarchical relationship between features at the same location. One feature is designated the parent, others are its children. For example, a buoy could be a parent and attached equipment such as lights and navigational devices would be its children.
In S-57 data, feature relationships are called parent/child relationships. |
• A collection is a special S-57 object that contains information about relationships between objects. Collection objects can contain other collection objects. These objects do not have any spatial representation and, unlike other objects, they cannot be filtered or selected using standard HPD tools.
Feature Relationships
Modify feature relationships on a specified usage.
If a child is removed from the feature relationship, all representations of this feature on other usages are automatically removed. |
Editing includes:
• Delete relationship
• Remove child
• Modify attributes
Related commands
• • | • |
Collections
Create a collection from a selection of features or edit existing collections.
Editing includes:
• Modify attributes
• Edit certification status
• Add features
• Add collection object
• Remove features
• Delete
• Undelete
• Verify deletion
• Reject
Related commands
• • | • |