vb编写的电子地图软件，内附带上海电子地图，拥有常见的放大，测量距离，查询制定地点等功能...

MapObjects与VB的索引图和放大图源代码-MapObjects and VB index map and enlarge the map source code

vb通讯《GIS开发者》Visual Basic 是Mcrosoft公司推出的强有力的系列开发软件之一，而且以其实用、方便、快捷、开发周期短、广泛而强大的功能越来越被广大编程人员所亲赖，广为流传，似乎有些专业的编程人员放弃了Visaul C++ 而改用了Visaul Basic之类的RAD编程工具，尽管Visaul C++在灵活性、代码紧凑、运行速度快及底层开发等方面Visaul Basic无法比拟的，但编写C++应用程序过长的调试和开发周期确实有点不适应当今的应用程序开发环境。-vb communications, "GIS" Visual Basic is Mcrosoft launched a series of powerful software development, but its practical, convenient, fast and short development cycle, extensive and powerful features are increasingly the majority of programmers are pro-Lai, the most widely circulated, it appears that some professional programmers abandoned FoxPro C and switch to the Basic FoxPro like RAD programming tools, despite the flexibility of C FoxPro, code compact, fast operation and development, and so on the bottom FoxPro Basic incomparable, but the C application debugging and long development cycle is really not suited to today the application development environment.

运城地区arcgis软件的电子地图，有需要的可下载研究哦。-Yuncheng area ArcGIS software electronic map has the necessary research can be downloaded Oh.

one route algorithms in c

GPS中一个读取RINEX程序模块，可由给定的卫星号及历元时刻读出C1，P1，P2，L1和L2观测量.-GPS RINEX a reading program modules can be given to the satellite, and Epoch moment to read out C1, P1, P2, L1 and L2 observables.

GIS、MapInfo与MapBasic学习教程，让读者尽快掌握相关的软件功能。-GIS, MapInfo and MapBasic learning tutorials to allow readers to quickly grasp the relevant software.

本人总结的GIS中重要的开源库GDAL的使用方法!-I have summarized the important open source GIS library GDAL to use!

这是一个用C语言做的关于最短路径的算法，请各位高手多多指教！-This is a C language on the shortest path algorithm, you master a great weekend!

本程序为个人GIS、路径算法及GPS定位的测试程序。主要用来测试GIS环境及算法的可靠和稳定性. -This procedure for personal GIS, and GPS positioning path algorithm testing procedures. GIS is mainly used to test the environment and the reliability and stability of algorithms.

应用背景在物力大地测量学中，重力异常的计算，需要测量计算点的重力值和计算测量点的正常重力。计算正常重力时，需要已知计算点大地坐标，即经度、纬度和大地高，如果采用GPS采集数据，那么获得的大地坐标的参考椭球是WGS84。关键技术此程序，采用WGS84参考椭球参数，因此输入数据为WGS84大地坐标，顺序为，纬度、经度、大地高。输入文件为，Input.dat。输出文件为，output.txt。计算结果为，椭球面以上高程为h处的正常重力。如果将大地高设为0，那么计算结果为此点处参考椭球面上的正常重力。