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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

vc++ MapX二次开发中问题较多的中文标注的解决。在地图上标绘图标，可输入经纬度精确定位，并显示最多可输入50个汉字的标注，图标在地图上拖动移位，图标删除等，附带缩放、漫游、归心、状态栏显示当前鼠标位置经纬度等基本功能。-vc++ MapX secondary development of the Chinese are more marked resolved. Drawing on the map superscript superscript, enter the latitude and longitude accurate positioning, and display up to 50 Chinese characters input tagging, drag the icon on the map shift, delete the icon, etc., with zoom, roam, in the heart, the status bar displays the current mouse and other basic functions of latitude and longitude position.

openlayers WebGis开发 geoserver 可以显示地图常用功能 缩放工具条控制、图层控制和鹰眼图等-openlayers WebGis development geoserver commonly used functions can show the map Zoom toolbar control, layer control and Hawkeye map

1.ArcEngine组件接口的引用，组件库的初始化，接口授权的使用，创建矢量文件接口的调用步骤

十分强悍的墨卡托投影反算程序。方便大家下载-Very powerful anti-Mercator counting procedures. Easy to download U.S.

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这是前年6月份接的一个任务，等值线的处理，基于给定的经纬图，做等值线分析，对于gis程序人员来说，应该是有帮助的！哈哈，要用到mapx5和mapinfo和vb6-This is the year in June following a mandate, the contours, based on the ins and outs of a given map, so contour analysis, gis procedures for personnel, should be helpful! Ha ha, and use of MapInfo and mapx5 vb6

在VC环境中利用MAPX实现在地图中的直线测量与折线测量。-in VC Connection use the map to achieve the linear measurement and measurement dogleg.

ArcGIS基础教程，适合初学者使用，包括基本界面介绍、数据分析，建立专题地图，商业选址等等

读取Mapgis源码文件: *.wal, *.wat, *.wap等的IDL源程序.读完后生成IDL图形对象.-Read Mapgis ascii code files,*.wal,*.wat,*.wap. and then create IDL objects