mapgis二次开发sdk，实例程序，有部分vb程序，献给mapgis二次开发的朋友。...

此为成功案例的开发，结合了C#和MapObjects组件，使用者要安装此组件。-this case for the success of the development, a combination of C# and MapObjects. users must install this component.

vb+Mapinfo开发之最短路径，同时还有SQL查询等功能-vb+ Mapinfo development of the shortest path, along with features such as SQL Query

地球两点距离根据经纬度计算两点间的距离。delphi程序-Two points away from the Earth s latitude and longitude calculated according to the distance between two points. delphi program

本系统有别于其它的公交线路查询系统，将地铁和轨道交通纳入了换乘范围 ，可设置不同的搜索条件，如优先选择地铁、少的换乘、少的费用、时间最少等条件，得到满足要求的换乘路线-The system is different from the other bus line inquiry system, subway and rail transportation will be included in the scope of the change can be set up different search criteria, such as the preferred choice subway, take less and less cost, time and other conditions at least, be meet the requirements of the transfer line

GDAL 用于raster文件的读写功能-GDAL for raster file read and write functions

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。

gis-pb+mapinfo 可以看一下-gis- pb MapInfo can look at the

MapXtreme for java 471 例程,有意者:sylincun@hotmail.com 联系-MapXtreme for java 471 routines, interested persons : Contact sylincun@hotmail.com

应用VB+MO实现的简单的查询系统，可以实现图层的放大、缩小、图层控制以及图形和属性的查询,和打印功能.-VB MO realize the simple query system, the layer can be achieved to zoom, layer control, as well as graphics and attributes of inquiries and printing functions.

VC下读取shp文件，不是二次开发的 可能有点用-VC read AutoCAD documents, the second development is not possible with a bit