Table 6.249 — DRM_Spatial_Resolution_Level_Of_Detail_Data

Property

Description

Class
  • <DRM Spatial Resolution Level Of Detail Data>

Superclass

Subclass
  • None.

Definition

An instance of this DRM class specifies the spatial resolution of the associated data, which governs the switching of objects by a spatial-resolution-based <DRM Level Of Detail Related Geometry> or <DRM Level Of Detail Related Features> instance.

Class diagram

Figure 6.297 — DRM_Spatial_Resolution_Level_Of_Detail_Data

Inherited field elements

Field name

Range

Field data type

None

    

Field elements

Field name

Range

Field data type

spatial_resolution1

[0.0...]

Long_Float

unit2

 

Spatial_Index_Spacing_Unit

Associated to (one-way) (inherited)
  • None.

Associated to (one-way)
  • None.

Associated by (one-way) (inherited)
  • None.

Associated by (one-way)
  • None.

Associated with (two-way) (inherited)
  • None.

Associated with (two-way)
  • None.

Composed of (two-way) (inherited)
  • None.

Composed of (two-way metadata) (inherited)
  • None.

Composed of (two-way metadata)
  • None.

Component of (two-way) (inherited)

Component of (two-way)
  • None.

Constraints

Clarifications

1 This indicates the spatial resolution of the associated data, and shall be a positive value.

2 This specifies how the spatial resolution value is measured.

Example(s)

  • NIMA Digital Terrain Elevation Data (DTED) is produced at a number of standard spatial resolutions: 30 arc seconds, 3 arc seconds, 1 arc second, 0.3 arc second, and so on. Although the spatial resolution of the longitudinal axis varies with latitude, the spatial resolution of the latitudinal axis is fixed (and equals that of the longitudinal axis at the equator).

  • Atmospheric data sets are often produced in an Augmented Projection- based Spatial Reference Frame, such as ALCC (Augmented Lambert Conformal Conic), at a number of standard spatial resolutions, such as 81 kilometres, 27 kilometres, and 9 kilometres.