multiview projection

Author: Zhao Bo, author of the projection of metropolitan and eurban areas: October 11, December 26, 2007 • Technology • 9 comments Http://www.geoinformatics.cn/2007/12/%E5%85%B3%E4%BA%8E%E9%83%BD%E5%B8%82%E5%9C%88%E5%92%8Ce%E9%83%BD%E5%B8%82%E7%9A%84%E6%8A%95%E5%BD%B1%E9%97% AE %E9%A2%98/ Recently, we have made some preliminary research on the 2.5D WebGIS of metropolitan areas and eurban areas. In my opinion, in terms of MAP implementation, this

Original post address: http://blog.csdn.net/popy007/article/details/1797121 Perspective Projection is an important part of a 3D fixed assembly line. It is used to transform the points in the camera space from the cone (frustum) to the canonical view volume, the Perspective division action after cropping. In the algorithm, it is completed in two steps: Perspective matrix multiplication and perspective division. Perspective

Let's take a look at the map projection used by Google Maps. Google Maps,Virtual EarthMap projection used by network geography is often calledWeb MercatorOrSpherical MercatorThe main difference between it and conventional mocato projection is thatSimulate the Earth as a sphere rather than an elliptical body. For more information about why

Google maps Map Projection full resolution (1): Web Mercator projectionMap projections used by web geography such as Google maps and Virtual Earth are often referred to as Web Mercator or spherical Mercator, and the main difference from regular Mercator projections is that the earth is modeled as a sphere rather than an ellipsoid. It is recommended to do a basic understanding of the map projection knowledge

Also known as the positive axis conformal cylindrical projection. A cylindrical projection of a kind, by the Dutch map biologist Mercator (G. Mercator) was created in 1569. Is the most influential in the map projection method.Imagine a cylinder aligned with the axis of the Earth cut or cut in the world, according to the isometric conditions of the graticule

Http://wenku.baidu.com/link?url=wDkyQR9fDI_tZas1BlMRUnNNoKwiQDygltm2wWxRr_sDwcDB51_QCDfR4Gb5wYrIUZ_ Tyxpjhzcquyebgoc2ce5th-i6npzkeqthz9zfnt7Reprinted from: http://wenku.baidu.com/view/f478d71aa8114431b90dd870.htmlThese parameters can also be based on the field of view (FOV–Field of View) parameters to obtain. Here are twoVisual field diagram of a plane: whichTwoFoVrespectively, inX-zAndY-zVision on the plane.If only one view was given,AlsoCan be calculated by the aspect ratio of the

Transverse Mercator (transverse Mercator) projection descriptionThis projection, also known as the Gaussian-gram gauss–krüger projection, is similar to the Mercator projection, except that the cylinders are arranged vertically along the meridians rather than the equator. The isometric projections generated by this meth

homogeneous coordinate transformation, you only need matrix multiplication to complete everything. If you need to have an in-depth understanding of the above, you need to learn the relevant knowledge of a transformation, and calculate the multiplication of the matrix by yourself. In iOS, calayer 3D is essentially not a real 3D (its viewpoint, that is, the position of the observation point or the so-called camera, cannot be changed), but only a 3D projection