1      Definition

A Data Type representing an Object’s position, velocity, and acceleration.

2      Functional Requirements

  • The Position of an Object is that of a representative point in the Object.
  • Cartesian and Polar Coordinate Systems are supported.
  • The following media used types are supported: Audio; Visual; Audio-Visual; Haptic; Smell; RADAR; LiDAR; Ultrasound.
  • Error is the estimated absolute value of the measured spatial and angular values of each of CartPosition, SpherPosition, CartVelocity, SpherVelocity, CartAccel, SpherAccel.

3      Syntax

https://schemas.mpai.community/OSD/V1.1/data/Position.json

4      Semantics

Table 1 provides the semantics of Position. It should be noted that each of Position, Velocity, and Acceleration can be expressed either in Cartesian (X,Y,Z) or Spherical (r,φ,θ) Coordinates.

Table 1 – Semantics of the Spatial Attitude

Label Description
Header Position Header
– Standard-Position The characters “OSD-OPS-V”
– Version Major version – 1 or 2 characters
– Dot-separator The character “.”
– Subversion Minor version – 1 or 2 characters
ObjectPositionID  Identifier of Object Position.
General Set of general data
– CoordinateType One of Cartesian, Spherical, Geodesic, Toroidal.
– ObjectType One of Digital Human, Generic.
– MediaType One of Speech, Audio, Visual, Audio-Visual, Haptic, Smell, RADAR, LiDAR, Ultrasound.
– Precision one of single precision, double precision
Object Position
– CartPosition (X,Y,Z) Array (in metres)
– CartPositionAccuracy (XYZ) Array (in metres)
– SpherPosition (r,φ,θ) Array (in metres and degrees)
– SpherPositionAccuracy (r,φ,θ) Array (in metres and degrees)
Velocity of Object Position
– CartVelocity (X,Y,Z) Array (in metres/s)
– CartVelocityAccuracy (XYZ) Array (in metres/s)
– SpherVelocity (r,φ,θ) Array (in metres/s and degrees/s)
– SpherVelocityAccuracy (r,φ,θ) Array (in metres/s and degrees/s)
Acceleration of Position
– CartAccel (X,Y,Z) Array (in metres/s2)
– CartAccelAccuracy (XYZ) Array (in metres/s2)
– SpherAccel (r,φ,θ) Array (in metres/s2 and degrees/s2)
– SpherAccelAccuracy (r,φ,θ) Array (in metres/s2 and degrees/s2)
Trace ID and time of AIM generating Position.
DescrMetadata Descriptive Metadata