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  2. Trilateration - Wikipedia

    en.wikipedia.org/wiki/Trilateration

    Trilateration is the use of distances (or "ranges") for determining the unknown position coordinates of a point of interest, often around Earth (geopositioning). [1] When more than three distances are involved, it may be called multilateration , for emphasis.

  3. Triangulation - Wikipedia

    en.wikipedia.org/wiki/Triangulation

    Triangulation today is used for many purposes, including surveying, navigation, metrology, astrometry, binocular vision, model rocketry and, in the military, the gun direction, the trajectory and distribution of fire power of weapons. The use of triangles to estimate distances dates to antiquity.

  4. GPS signals - Wikipedia

    en.wikipedia.org/wiki/GPS_signals

    GPS encodes this information into the navigation message and modulates it onto both the C/A and P(Y) ranging codes at 50 bit/s. The navigation message format described in this section is called LNAV data (for legacy navigation). The navigation message conveys information of three types: The GPS date and time, and the satellite's status.

  5. Position resection and intersection - Wikipedia

    en.wikipedia.org/wiki/Position_resection_and...

    Position resection and intersection are methods for determining an unknown geographic position (position finding) by measuring angles with respect to known positions.In resection, the one point with unknown coordinates is occupied and sightings are taken to the known points; in intersection, the two points with known coordinates are occupied and sightings are taken to the unknown point.

  6. Geodetic control network - Wikipedia

    en.wikipedia.org/wiki/Geodetic_control_network

    Classically, a control is divided into horizontal (X-Y) and vertical (Z) controls (components of the control), however with the advent of satellite navigation systems, GPS in particular, this division is becoming obsolete. In the U.S., there is a national control network called the National Spatial Reference System (NSRS). [2]

  7. Triangulation (surveying) - Wikipedia

    en.wikipedia.org/wiki/Triangulation_(surveying)

    Triangulation of Kodiak Island in Alaska in 1929. In surveying, triangulation is the process of determining the location of a point by measuring only angles to it from known points at either end of a fixed baseline by using trigonometry, rather than measuring distances to the point directly as in trilateration. The point can then be fixed as ...

  8. Free stationing - Wikipedia

    en.wikipedia.org/wiki/Free_stationing

    Angular resection and triangulation: only bearings are measured to the known points. Trilateration: only distances are measured to the known points. Free stationing and triangulateration: both bearings and distances are measured to the known points.

  9. Real-time locating system - Wikipedia

    en.wikipedia.org/wiki/Real-time_locating_system

    ID signals from a tag are received by a multiplicity of readers in a sensory network, and a position is estimated using one or more locating algorithms, such as trilateration, multilateration, or triangulation. Equivalently, ID signals from several RTLS reference points can be received by a tag and relayed back to a location processor.