Skip to main content

Other Physical Details Encoding Scheme

Element Reference​

Definition
Syntax Encoding Scheme for the statement of coordinates and equinox.
Scope note
Domain
Range
URI
https://www.iflastandards.info/ISBDM/elements/CC2017
Type
owl:Class
Status
Published

Definition​

This refers to the combined statement of coordinates (terrestrial or celestial), celestial hemisphere, epoch, and equinox for cartographic resources. It is a crucial part of the Mathematical Data (Area 3.1). While the query lists "Statement of Coordinates and Equinox", the ISBD sources show "Statement of coordinates and celestial hemisphere" (3.1.3) and "Statement of epoch and equinox" (3.1.4) as distinct elements, which are often grouped together in punctuation.

Required Elements​

  • Coordinates (Mandatory if applicable):
    • Terrestrial coordinates: Longitude (W/E) and latitude (N/S) given in degrees, minutes, seconds (e.g., "E 79°–E 86°/N 20°–N 12°").
    • Right ascension and declination (Celestial): RA in hours, minutes, seconds and Decl. in degrees, minutes, seconds (with + for northern, - for southern celestial hemisphere).
    • Other celestial coordinate systems: Decimal degrees for longitude and latitude, with the name of the system (e.g., "ecliptic coordinates").
  • Celestial hemisphere (Optional): Specifies the northern, southern, or both celestial hemispheres.
  • Epoch (Mandatory if available): An arbitrary moment in time to which measurements of position are referred.
  • Equinox (Mandatory if available): One of two points of intersection of the ecliptic and the celestial equator, occupied by the sun when its declination is 0°.

Punctuation Rules​

  • The statements of coordinates, celestial hemisphere, epoch, and equinox are enclosed in one pair of parentheses ( ).
  • The statement of celestial hemisphere is preceded by ;.
  • The statement of equinox is preceded by ;.
  • Within coordinate ranges, individual values are linked by – (no space) and different coordinate types by / (no space).

Relationship to ISBD Standards​

This combines elements 3.1.3 and 3.1.4 within the Mathematical Data Area (element 3.1, part of Area 3). The 2021 Update refined these stipulations, especially for celestial cartography.

Relationship to Other SES​

It is a key part of the "Mathematical Data Area Encoding Scheme," which is itself part of the "Material Or Type Of Resource Specific Area Encoding Scheme." Notes can provide further elaboration.

Examples​

  • (E 79°–E 86°/N 20°–N 12°)
  • (RA 16 h 30 min to 19 h 30 min/Decl. -16° to -49° ; southern celestial hemisphere)
  • (RA 2 h/Decl. +30° ; equinox 1950)

This content was automatically generated from the ISBD PDF documentation using Gemini AI analysis.