Abstract
The great circle route and rhumb line are two important spherical curves. The characteristic of the former curve could be best understood on a sphere, while the characteristic of the latter is fully expressed on a projected map, which is Mercator's projection. This paper utilized electronic map APIs and web3D techniques to provide an interactive webpage to display 2D and 3D views. A projected Mercator world map is displayed in 2D view, and a virtual globe is displayed in 3D view. The great circle route and rhumb line are visually compared in multi-dimensional environment. The technique demonstrated in this paper provides a convenient way to understand the great circle route and rhumb line, and is especially useful in education.
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