地图投影与坐标系（Map projection and coordinate
system）
地图投影与坐标系(Map projection and coordinate system) 3.5.1 world map projection
The projection map of the world are considered to ensure that the overall deformation is not global, according to different requirements, or need to have equiangular product properties, including: differential parallel polyconic projection, tangent difference parallel polyconic projection (1976 scheme), arbitrary pseudo cylindrical projection, is conformal cylindrical projection cut.
3.5.2 hemisphere map projection
East and West hemisphere area transverse azimuthal projection, transverse azimuthal orthomorphic projection; southern and northern hemisphere have positive azimuthal equal area projection, positive axis azimuthal conformal projection, positive axis azimuthal equidistant projection.
3.5.3 continents map projection
1) projection map of Asia: oblique azimuthal equal area projection, bonne projection.
2) projection map of Europe: oblique azimuthal equal area projection, orthoaxis isometric conic projection.
3) projection maps of North America: oblique azimuthal equal area projection, bonne projection.
4) projection map of South America: oblique azimuthal equal area projection, Sanson projection.
5) projection map of Australia: oblique azimuthal equal area projection, orthoaxis isometric conic projection.
6) map projection Latin: oblique azimuthal equal area projection. 3.5.4 China map projections
1) Chinese national map projection: oblique azimuthal equal area projection, oblique azimuthal conformal projection, projection, pseudo azimuthal projection, Penina is the axial area of conic projection, normal secant conic conformal projection.
2) China province (District) map projection: normal secant conic conformal projection, conic projection axis area, positive axis cylindrical projection, Gauss Kruger projection (broadband).
3) large scale map projection Chinese: polyhedral projection (Northern Warlords), Conformal Conic Projection (Lambert projection) (liberation), Gauss Kruger projection (Liberation).
4. - Gauss Krueger projection
Because of this projection is drawn up by the German mathematician, physicist and astronomer Gauss in 1820s, after the German geodesist Krueger in 1912 on the projection formula
to be added, it is known as the Gauss - Krueger projection. Gauss - Krueger projection in Anglo American countries known as the transverse Mercator projection. The preparation of global transverse Mercator projection world military maps and earth resources satellite
images used (UTM) is a variant of the transverse Mercator projection. Gauss Kruger projection of the central meridian length ratio is equal to 1, the provisions of the central meridian UTM projection length ratio is 0.9996. In 6 degrees with the maximum length of deformation is not more than 0.04%.
Gauss Kruger projection of the central meridian and the equator is a straight line perpendicular to each other, the other is concave to warp and symmetrical to the central meridian curve, the other is latitude with the equator as the axis of symmetry to the polar curve of latitude and longitude lines intersect at right angles. In this projection, no deformation. The central meridian length ratio equal to 1, no other than the length of the warp length deformation is greater than 1, the length of the deformation is far more from the central meridian of deformation, the maximum deformation in the intersection of the edge of the meridian and the equator; the area from the central meridian deformation is more distant, more deformation. In order to ensure the accuracy of the map, with a projection method, the projection range of things circles to limit the deformation does not exceed a certain limit, so the combined with many,
Can be projected across the region (Figure 4-12). Gauss: the Krueger projection deformation characteristics are: in the
same meridian, the length of the deformation increases with the decrease of latitude, at the equator is the maximum; in the same latitude, the length of the deformation increases with the difference,
地图投影与坐标系(Mapprojectionandcoordinatesystem)
