Chemical composition of upper crust in eastern China

In an area of 3.3×10⁶ km² within eastern China, 28 253 rock samples were collected systematically and combined into 2718 composite samples which were analyzed by 15 reliable methods using national preliminary certified reference materials (CRMs) for data quality monitoring. The average chemical compositions of the exposed crust, the sedimentary cover and the exposed basement as well as the upper crust for 76 chemical elements in eastern China are given. A key basic geology projcct supported by Ministry of Geology and Mineral Resources of China.     

Horizontal crustal movement in Chinese mainland from 1999 to 2001

The paper introduces the horizontal crustal movement obtained from GPS observations in the regional networks (including the basic network and the fiducial network) of the Crustal Movement Observation Network of China (CMONOC) carried out in 1999 and 2001. This paper is characterized by the acquisition of the horizontal displacement velocities during the period from 1999 to 2001 at the observation stations in the regional networks with datum definition of a group of stable stations with small mutual displacements in east China. Based on the most detailed map of horizontal crustal movement in Chinese mainland, the division of blocks, their displacements and deformations are studied. An approach to analysis of the intensity of the horizontal crustal deformation is proposed. The general characteristics of the recent horizontal crustal movement in Chinese mainland and that before the Kunlunshan earthquake of M=8.1 on November 14, 2001 are analyzed. Foundation item: The National Development and Programming Project for Key Basic Research (95-13-03-07).     

基于GPRS的远程气象观测数据实时采集传输系统及其应用

通过对远程自动气象站数据实时采集传输通讯方式的比较，提出基于通用分组无线业务（GPRS）的远程自动气象站数据实时采集和传输系统的技术方案，以小数据流方式，实现野外自动气象站观测数据的实时采集、传输和对观测设备运行的监控，达到节约经费，提高数据传输时效的目的，并将此系统成功地用于苏通长江公路大桥施工期气象环境监测与预警系统中。     

从平台GIS到跨平台互操作GIS的发展

介绍了跨平台互操作GIS的基本概念、主要关键技术和目前的发展状况以及该技术在我国的进展     

基于Web Service的OGC地图服务实现方法

给出了使用WebService技术实现OGCWeb地图服务的具体方法和关键技术，并给出了Web地图服务的客户端实例。     

基于WMS的WebGIS

介绍了Web地图服务规范,通过一种WebGIS的互操作模型实现了WMS,并详细描述了客户端的实现.