The technique hinges upon the use of a set of numbered controls that 1) appear in the structure from motion point cloud model and 2) are mapped by a survey instrument (high accuracy GPS or accurately coordinated total station). Using the Helmert tran

包括了在c#和VB源代码。利用GPS卫星来确定当前位置,原子时间同步电脑时钟,坐标和投影库,本文将教你如何生成自己的地图。-In part one of this series, I described how to write an interpreter for raw GPS NMEA data. Part two described how to monitor and enforce GPS precision data to develop commercial-quality so