Introduction - If you have any usage issues, please Google them yourself
a basic GIS, the need to contain the following components : Coordinate data management space vector graphics system, the attribute data management database management system and the realization of vector graphics system and the database management system of two-way link connecting systems and spatial analysis functions. Vector graphics system is an important part of GIS, as well as the development of GIS systems are all about. A basic vector graphics systems generally require the following functions : 1. A relatively perfect graphics elements, should have the point, line, surface, the Internet and other graphic elements, these graphics system in large measure to meet the general management of GIS vector graphics system requirements. Gong said the vector graphics display functions in large