The graticule determines the latitude and longitude of positions on the surface.
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An internal graticule provides an advantage in that it eliminates parallax error.
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The graticule on the ellipsoid is constructed in exactly the same way as on the sphere.
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Lines of constant latitude and longitude together constitute a graticule on the reference surface.
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Most oscilloscopes have a graticule as part of the visual display, to facilitate measurements.
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The figure on the left shows how a transverse cylinder is related to the conventional graticule on the sphere.
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A graticule on a sphere or an ellipsoid.
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The graticule may be permanently marked inside the face of the CRT, or it may be a transparent external plate.
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Unlike an external graticule, an internal graticule can not be changed to accommodate different types of measurements.
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More examples
Reticle: a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument
A grid of horizontal and vertical lines; The network of lines of latitude and longitude that make a up a coordinate system such as the one used on the Earth; A nearly square or nearly rectangular region created by a graticule
(Graticules) a network of lines on a map which represent the meridians of longitude and parallels of latitude.
Network of parallels and meridians on a map or chart.
The pattern created by intersecting lines of latitude and longitude (parallels and meridians). This configuration makes several assumptions about the shape of the globe, most notably that it is a perfect sphere.
A system of parallel lines or crossed lines at the telescope's focal plane, used in micrometers.
(n) A regular ruling across a model surface; a standard reference mesh based on a grid oriented in a manifold.
The CRT grid lines that facilitate the location and measurement of oscilloscope traces.
The grid overlay on the screen of an oscilloscope.