July 2018
Intermediate to advanced
358 pages
7h 17m
English
Content preview from Unity 2018 Augmented Reality Projects
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Projections and coordinate systems
The Earth can be represented by various models, and all of them provide a different coordinate set for every point on the surface of the Earth. The simplest model assumes that the Earth is a perfect sphere, although we know it isn't. And as more measurements of the Earth have been accumulated, consequently, the models of Earth have become extremely sophisticated and accurate. There are models that have different data that apply to different areas of the Earth, which provides increased accuracy. NAD83 is a US measurement, and WGS84 (World Geodetic System) is for worldwide measurements.
There are clear but very minor differences between NAD83 and WGS84, besides one being worldwide and the other being US-based. ...
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