From the independent encapsulation , real - time query , and dynamic analysis , the paper describes the information encapsulation , information query , and error analysis facing the geographic feature under gis environment . so the position information , attribute information , and accuracy information will be combined together . that is called the organic combination of information store and information visualization 本文从独立封装、实时查询分析入手，探讨了gis环境下面向地理特征的图形信息封装、查询分析方法，使位置信息与属性信息，定位信息与定位精度信息，信息存储与信息可视化有机结合在了一起。
2 . using gps to position repair vehicles , locale subsystems collect the locale repair data , design locale emergency measures , print work paper , accept the unite scheduling , etc . using gsm sms as the communication channel between locale subsystems and the center of supervising and scheduling system of electrical repairing 利用gsm移动电话网做为通信媒介，利用gps定位技术以及gsm移动电话的短信息功能传送gps定位信息，结合地理信息系统，实现了对电力抢修车位置的跟踪、监控、报警求助、信息服务、抢修调度等功能。
If users open a data file that include id , latitude , longitude and attribute information , users can use the softw are to view , find , add , modify and delete those data stored in the data file . using these data stored in the opened data file , a grid graph expressing the distributing status of attribute information in a farm will be created on the computer ' s screen . if farming machinery is equipped with a gps receiver , operators can use spatial information obtained by gps receiver to make sure the location of the farming machinery on the grid graph , then get the attribute information on the location 在该应用软件中实现gps接收机与计算机的串行通信，从融合信息中检索出经纬度坐标和属性信息形成为采样数据，存储到数据文件中；可以浏览、查询、添加、修改和删除access数据表中的数据记录；利用存储在数据文件中的采样数据生成属性信息分布图，实现用栅格图形来表达基础农田信息；对于配备了gps接收机的农业机具，可以根据gps定位信息从属性信息分布图中实时地提取当前农业机具所在位置的土壤的属性信息。
In view of requires of precision agriculture and specialties of farmers , it tentatively use visual c + + to devise a software without gis platform . the software is developed to process the fused data and use grid graph to express field information . in the software , users can transmit the fused data to computer via serial communication between gps receiver and computer , and users can choose longitude latitude and attribute information from the fused data , and store these data in a data file 在本论文中，通过对国内外获取、表达基础农田信息的研究现状的分析，基于gps接收机获取的定位信息与常规检测仪表信息的融合，提出了gps接收机与常规检测仪表结合，快速实时地获取农田空间位置信息和属性信息的方法；针对精细农业实践的需要和农村用户的特点，试验研究脱离gis平台以图形的形式表达农田信息，应用visualc + +编程语言从底层开发具有gis功能的应用软件。
The work process is that the gps subsystem receives gps data from gps satellites , disposes and sends them to the main control console ; the main control console matches gps position data with digital map and displays on the lcd of the system . if the system wants to communicate with the monitoring and dispatching center or user wants to communicate with others , the gsm / gprs subsystem can be used . the main control console consists of arm microprocessor , linux operating system and minigui 系统的工作过程可描述为: gps子系统接收来自gps卫星的定位信息,处理后将定位信息传送给主控平台;主控平台将实时定位信息与电子地图匹配并通过直观的方式显示在系统的lcd上;如果车载导航系统需要与监控中心进行数据通信或者用户需要和监控中心或第三方进行通信,则可通过主控平台来控制gsm / gprs子系统来实现,通信方式包括短信息通信、语音通信、 gprs通信。
With the rapid development of micro - electronic technology and internet , miniaturization and network realization will be a developmental direction of dgps . it can meet many user requirements such as device cost and algorithm agility and so on . how to obtain and process gps data efficiently is an important technology 随着微电子技术和internet的飞速发展，小型化、网络化将会成为差分gps ( dgps )的未来发展趋势，它可以满足设备成本以及算法灵活性等多方面的要求，其中， gps数据采集和实时传输是处理定位信息的关键技术之一。
