遥感与地理信息系统一体化是科学技术发展的趋势，遥感影像地图是现代地图发展的新图型。本文介绍了基于CITYSTAR进行遥感影像地图编制的研究和实践，阐述了其工艺过程和关键技术，并以厦门和达竹两个例子说明具体的工作方法与步骤。

CORBA是一种开放的分布式对象计算底层支持，其目的在于保证组件的可重用性、可移植性和互操作性。CORBA为解决不同平台上的分布式计算问题，从而为开发功能更强大、通用性更强、可互操作的GIS平台提供了条件。该文就CORBA技术、CORBA技术与GIS技术的结合、基于CORBA的GIS系统结构、CORBA编程等内容进行了探讨。

本文简要介绍地理信息系统有关名词与概念。

Drainage density, defined as river length per unit area, is an important tool to reveal the concealed active tectonics in the Quaternarycovered North China plain (NCP). The distribution of high-drainage density is characteristic of zonation and regionalisation. There are two sets of belts with high-drainage densities, which trend at 45-50 and 315-320°. The different locations and trends of these belts make it possible to divide the NCP into three regions. They are Beijing-Tianjin-Tangshan region in the north, Jizhong-Lubei region in the middle and Xingtai region in the south. Similarly located regions can be defined using contours of deformation data from geodetic-surveys from 1968 to 1982. Belts of high-drainage density are spatially coincident with seismotectonic zones and overlie concealed active faults. These active structures strike at an angle of≈15°to that in the Eocene-Oligocene, a discordance, which may be an indication of an evolution of the fault pattern through time in the NCP during the Cenozoic. The current phase has more important consequences regarding seismic hazards in the NCP.

动态分段技术是GIS网络分析中的一种重要的技术手段，它可以有效解决基于线性特征的动态分析问题。该文探讨了动态分段技术的基本原理和思想，并提出一套基于链—动态结点模型的动态分段模型及其实现方法，该模型结构简单，容易实现，并在实际应用中取得了良好的实用效果。