Class Name: OM Location 3D

Superclass - Location 3D

Definition

A coordinate within the Augmented Oblique Mercator (AOM) 3D Spatial Reference Frame (SRF).

The Augmented Oblique Mercator projection-based Spatial Reference Frame is a cylindrical, conformal projection placed tangent to the Object Reference Model/Earth Reference Model (ORM/ERM) along lines which are neither meridians nor parallels. When secant, two rather than a single "central line" are defined; alternatively this can be expressed as a "central scale factor". The "central line" is defined by two locations on the ORM/ERM.

When used to define a 3D spatial reference frame, the resulting X and Y axes are measured in meters (rather than arc degrees), and a 2D local origin offset is provided. The X axis lies along the central line, increasing from the first to second parametric location; the Y axis is perpendicular to the central line and forms a 2D right-handed coordinate system. The Z axis is oriented perpendicular to the other two axes, and forms a 3D right-handed coordinate system. The origin is defined by the first parametric location and the parametric vertical datum.

(Note that the central line is never along a parallel or meridian, in which cases the projection-based SRF thus defined would be either an Augmented Mercator (AM) or Augmented Transverse Mercator (ATM), respectively.)

See the SEDRIS Spatial Reference Model (SRM) for additional details.

Primary Page in DRM Diagram:

• 15

Example

FAQs

Constraints

• Environment Root Spatial Reference Frame
• Locations Under Model

Component of (one-way)(inherited)

• optionally, some Arcs
• optionally, some Base Perimeter Data
• optionally, some Base Reference Vectors
• optionally, some Directional Light Behaviors
• optionally, a Distance Level of Detail Data (notes)
• optionally, some Ellipses
• optionally, some Elliptic Cylinders
• optionally, some Feature Edges
• optionally, a Feature Node
• optionally, some Image Anchors
• optionally, some Labels
• optionally, a Location Table
• optionally, some Morph Points
• optionally, some Point Geometries
• optionally, some Property Grid Hook Points
• optionally, a Reference Origin
• optionally, some Spatial Domains
• optionally, some Spatial Index Related Feature Topologies
• optionally, some Spatial Index Related Features
• optionally, some Spatial Index Related Geometries
• optionally, some Tack Points
• optionally, some Vertices
• optionally, some Vertex with Component Indices
• optionally, some World 3X3s
• optionally, some World Transformations
• optionally, an Attachment Point
• optionally, some Center of Buoyancies
• optionally, some Center of Mass
• optionally, some Center of Pressures
• optionally, a Contact Point
• optionally, some Positional Lights
• optionally, some Separating Planes
• optionally, some Sound Instances
• optionally, some Stamp Behaviors
• optionally, some Volumes
• optionally, some Volume Level of Detail Data
• optionally, some Volume Light Behaviors

Field Elements

Notes

Component of Notes

Distance_Level_of_Detail_Data

 the center point for the LOD test

Fields Notes

x

 in meters; positive Eastward

y

 in meters; positive Northward

z

 Elevation or height; positive along xy surface normal