Rule Name: Homogeneous LOD

Definition

A Level of Detail Related Features or Level of Detail Related Geometry will only have one "type" of LOD components, specifically, that specified by its lod_data_type field.

That is,

1. A Base Level of Detail Data will only have one "type" of LOD components; different "types" of LOD will not be mixed.
2. Under a single aggregation, all Base Level of Detail Data shall have only one "type" of LOD components; different "types" of LOD will not be mixed.

Rationale

The mechanism for switching between different levels of detail is defined only if the 'type' of level of detail (distance-based, index-based, map-scale based, etc.) is homogeneous. See example #1.

Example

1. It isn't defined for a data provider to switch between
   • "0-500 meters" for Distance Level of Detail Data and
   • "sphere with radius 5 meters centered at 0,0,0" for Volume Level of Detail Data.

2. Range-based components and index-based components will not be attached to the same Level of Detail Related Geometry object.

3. Range-based components and scale-based components will not be attached to the same Level of Detail Related Features object.

FAQs