The coordinate origin of WGS 84 is meant to be located at the Earth's center of mass; the error is believed to be less than 2 cm.The WGS 84 meridian of zero longitude is the IERS Reference Meridian, 5 ...
Because Earth deviates significantly from a perfect ellipsoid, the ellipsoid that best approximates its shape varies region by region across the world. Clarke 1866, and North American Datum of 1927 wi ...
In surveying and geodesy, a datum is a reference point or surface against which position measurements are made, and an associated model of the shape of the earth for computing positions. Horizontal da ...
The HEALPix projection combines an equal-area cylindrical projection in equatorial regions with the Collignon projection in polar areas.Conic Albers conic.The term "conic projection" is used to refer ...
Maps can be more useful than globes in many situations: they are more compact and easier to store; they readily accommodate an enormous range of scales; they are viewed easily on computer displays; th ...
One might consider enlarging the domain of the Fourier transform from L1+L2 by considering generalized functions, or distributions. A distribution on Rn is a continuous linear functional on the space ...
There are several common conventions for defining the Fourier transform \hat{f} of an integrable function f : \mathbb R \rightarrow \mathbb C (Kaiser 1994, p. 29), (Rahman 2011, p. 11). This article w ...
From 1970 to 1973 Smith studied Mathematics and Philosophy at the University of Oxford, He obtained his PhD from the University of Manchester in 1976 for a dissertation on the Ontology of Reference.Fr ...
More than 1,000 unmanned missions have been designed to explore the Earth and the solar system. Besides exploration, communication satellites have also been launched by NASA. The missions have been la ...
From 1946, the National Advisory Committee for Aeronautics (NACA) had been experimenting with rocket planes such as the supersonic Bell X-1. In the early 1950s, there was challenge to launch an artifi ...
In imaging science, image processing is any form of signal processing for which the input is an image, such as a photograph or video frame; the output of image processing may be either an image or a s ...
For most of history, visible light was the only known part of the electromagnetic spectrum. The ancient Greeks recognized that light traveled in straight lines and studied some of its properties, incl ...
Photogrammetry uses methods from many disciplines, including optics and projective geometry. The data model on the right shows what type of information can go into and come out of photogrammetric meth ...
The ChromaDepth procedure of American Paper Optics is based on the fact that with a prism, colors are separated by varying degrees. The ChromaDepth eyeglasses contain special view foils, which consist ...
Stereoscopy creates the illusion of three-dimensional depth from given two-dimensional images. Human vision, including the perception of depth, is a complex process which only begins with the acquisit ...
