1     Definition 2     Functional Requirements 3     Syntax
4     Semantics 5    Conformance Testing 6     Performance Assessment

1        Definition

A Data Type including a collection of Basic LiDAR Objects.

A LiDAR Object can have a hierarchical structure where LiDAR Objects contain Basic LiDAR Objects and LiDAR Objects.

2        Functional Requirements

A LiDAR Object may include:

  1. ID of a Virtual Space (M-Instance) where it is or intended to be located.
  2. ID of the LiDAR Object.
  3. Space-Time information of the LiDAR Object.
  4. Basic LiDAR Object and LiDAR Objects included in the LiDAR Objects.
  5. Annotation data set including:
    1. Annotations
    2. Space-Times of the Annotations.
    3. Rights to perform Actions on the LiDAR Object.
  6. The Rights that may be exercised on the LiDAR Object.

Note that.

  1. A LiDAR Object that does not include Sub-Scenes and only one Basic LiDAR Object is a Basic LiDAR Object.
  2. The Space-Time information of a Basic LiDAR Object and LiDAR Object included in a LiDAR Object may be superseded by the Space-Time information of the LiDAR Object containing them.

3        Syntax

https://schemas.mpai.community/OSD/V1.3/data/LiDARObject.json

4        Semantics

Label Size Description
Header N1 Bytes LiDAR Object Header
– Standard-LiDARObject 9 Bytes The characters “OSD-LIO-V”
– Version N2 Bytes Major version – 1 or 2 characters
– Dot-separator 1 Byte The character “.”
– Subversion N3 Bytes Minor version – 1 or 2 characters
MInstanceID N4 Bytes Identifier of M-Instance.
LiDARObjectID N5 Bytes Identifier of the LiDAR Object.
LiDARObjectSpaceTime N6 Bytes Space-Time of LiDAR Object.
BasicLiDARObjectCount N7 Bytes Set of Parent LiDAR Objects.
BasicLiDARObjects[] N8 Bytes Set of Basic LiDAR Objects.
– SpaceTime N9 Bytes Space Time of a Basic LiDAR Object in the LiDAR Object.
– BasicLiDARObject N10 Bytes A Basic LiDAR Object in the LiDAR Object.
LiDARObjectCount N11 Bytes Number of LiDAR Objects.
LiDARObjects[] N12 Bytes Set of LiDAR Objects.
– SpaceTime N13 Bytes Space Time of a LiDAR Object in the LiDAR Object.
– 3DModelObject N14 Bytes A LiDAR Object in the LiDAR Object
Annotations[] N15 Bytes Set of LiDAR Object Annotation.
– Annotation N16 Bytes An Annotation.
– AnnotationSpaceTime N17 Bytes Where Annotation is attached and when it will be active.
– Rights N18 Bytes Actions that may be performed on the Annotation
Rights N19 Bytes Actions that may be performed on the Object.
DescrMetadata N20 Bytes Descriptive Metadata

5        Conformance Testing

A Data instance Conforms with LiDAR Object (OSD-LIO) V1.3 if:

  1. The Data validates against the LiDAR Object’s JSON Schema.
  2. All Data in the LiDAR Object’s JSON Schema
    1. Have the specified type
    2. Validate against their JSON Schemas
    3. Conform with their Data Qualifiers.

6        Performance Assessment