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The "globe", in the DGG concept, has no strict semantics, but in geodesy a so-called "grid reference system" is a grid that divides space with precise positions relative to a datum, that is an approximated a "standard model of the Geoid". So, in the role of Geoid, the "globe" covered by a DGG can be any of the following objects:
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Internal parts of a globe valve. This is an English version of File:Globe_valve_diagram.svg in Commons. Source I (Petteri Aimonen ) created this work entirely by myself. Date 12:01, 9 September 2009 (UTC) Author Petteri Aimonen Permission (Reusing this file) See below. Other versions Globe_valve_diagram.svg
A grid-based spatial index has the advantage that the structure of the index can be created first, and data added on an ongoing basis without requiring any change to the index structure; indeed, if a common grid is used by disparate data collecting and indexing activities, such indices can easily be merged from a variety of sources.
This allows for photorealistic images and renderings. For example, consider a circle of radius r. [14] The main pieces of information a program needs in order to draw this circle are An indication that what is to be drawn is a circle; the radius r; the location of the center point of the circle; stroke line style and color (possibly transparent)
The globe was also depicted on media and souvenirs promoting the fair. [33] The Unisphere's popularity was also increased by the presence of fountainheads around the globe's base, which cooled down fair visitors on hot days. [34] During the fair, dramatic lighting at night gave the effect of sunrise moving over the surface of the globe.
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A Magic Moving Pictures card by G. Felsenthal & Co. Magic moving pictures were composed of images containing black vertical and regularly interlaced stripes, alternating between two or three phases of a depicted motion or between distinctly different pictures. A little transparent sheet with regular vertical black stripes was glued beneath a ...