根据椭球大地坐标求正常重力

本文结合DCT变换的特性，利用分形的Peano一hilbert扫描曲线，对基于DCT变换的图像编码方法进行了研究，并提出了改进方法。主要工作分为两个部分: 一是在分块DCT基础上的改进。对分块后生成的各图像块矩阵，不直接作二维DCT变换，而是先进行扫描，使之重排成一维向量，再进行一维DCT变换，这样可以减少运算量。 其次是对层次余弦变换编码部分的改进。使用层次DCT变换与零树编码相结合的方法，并在扫描编码过程中，按Peano一hilbert扫描顺序进行编码。这样不仅可以减少“块效应”，而且可以加快编码速度。-this paper the characteristics of DCT, using fractal Peano a Hilbert scanning curve, the DCT-based image coding method for the study and improvement of methods. The work is divided into two main parts : First, the DCT block on the basis of improvements. Right after block production of the image block matrix, not for direct two-dimensional DCT, but first scan, so they line up in a heavy-dimensional vector and then a peacekeeping DCT, thus reducing the amount of computation. Secondly, the level of cosine transform coding some of the improvements. The use level of DCT and zero tree coding combination of methods, coding and scanning process, according to a Hilbert Peano code scanning sequence. This will not only reduce the "blocking

flex的在地图上显示谷歌地图某个位置的程序-flex

画线演示-line drawing demonstration

实现自定义GIS图层中图标的显示。 可以指定任意的ICON，BMP文件。-realize definition of GIS layers which show the icon. Can specify arbitrary ICON, a BMP file.

包含打开栅格矢量文件，渲染图层，属性查询，等等的arcgis功能

pocket pc sip 类库,集时通讯demo调用类库-pocket pc sip library, call the library collection when the communication demo

基于MapXteme 2004的类库，里面封装了一些常用的GIS功能。-MapXteme based on the Class of 2004, a package inside some common GIS functions.

广州09年最新矢量地图(MapInfo格式)-Guangzhou in 2009 the latest vector map (MapInfo format)

NaviPOWM is planned to be car navigation system capable of running on a variety of operating systems. At the time, only OSM based map data is supported. Realtime routing engine is planned in a later version. Geocaching and city guide functionality are also planned.

基于AO/AE的GIS功能原型。 并且给大家封装好了两个逻辑处理层的DLL，朋友们可以直接引用。是对AO/AE的又一次抽象，开发更加灵活。-based AO/AE prototype GIS functions. Packaging and good for everyone to the two logic layer DLL, and friends can be directly invoked. The AO/AE another abstract and develop more flexible.