ISO TC 211 Geographic information/Geomatics Committee site

ISO/TC 211 Geolexica

Concept tangent vector”

Term ID

2095

source

ISO 19107:2019, (E), 3.95

eng

tangent vector

first derivative of a curve parameterized by arc length

Note to entry: If `c(s) = (x(s), y(s), z(s))` is a curve in a 3D Cartesian space (`bbb"E"^3`), and `s` is arc length along `c`, then the tangent is `vec tau(s) = dot c(s) = (dot x(s), dot y(s), dot z(s))`, i.e. the derivative of the coordinate values of `c` with respect to `s`. The curvature vector is `kappa(s) = ddot c(s) = (ddot x(s), ddot y(s), ddot z(s))`.

ORIGIN: ISO/TC 211 Glossary of Terms - English (last updated: 2020-06-02)

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info

  • status: valid
  • classification: preferred
  • date accepted: 2019-12-02

Review

last review performed:
(2019-12-02)
status:
final
decision:
accepted
decision event:
Normal ISO processing
notes:
Publication of document ISO 19107:2019(E)