Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-6-1312-4409-4 |
Объём: | 104 страниц |
Масса: | 178 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 1 |
High Quality Content by WIKIPEDIA articles! In geometry, a hemispherical projection is a mapping from a hemisphere to a disk, used to make a flat picture of the hemisphere. Two main types are used: the equal-angle projection, which is stereographic projection, and the equal-area projection. These projections can be performed by computer, or by hand using special graph paper called a Wulff net or stereonet (for the equal-angle projection) or a Schmidt net (for the equal-area projection). Hemispherical projections are used in structural geology, crystallography, and other disciplines to plot orientations of lines in three-dimensional space. They are also closely related to map projections used in cartography.
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