In this paper , the background of webgis is introduced firstly , how to construct webgis is discussed in detail next . on the base of these discussions , the design on the whole of pim is built in chapter three , which contains the description of information and function of this system , the design of database and the data managing on the server side . it is an important part in this paper 1 、分析和总结了国内外现有的webgis基础平台解决方案的基础上，作者提出了powerintermap的总体设计方案，在本篇论文的第三章中作者详细介绍了powerintermap总体设计方案，主要有：系统的信息流描述、功能描述、服务器端数据库的设计、工作区及图幅集合对象的管理组件的设计。
The author also put forward the construction of ugis seamless database based on administrative district about how to construct the database of big - scale ugis . this method breaks the traditional method of construction of spatial data , makes the users put their attention to the query based on administrative and expresses the real world better 基于行政单元的数据组织打破了图幅的界限，把数据按行政单元进行存储，将用户的注意力转移到行政单元的查询、检索和分析上，无缝数据库的实现更好地模拟了现实世界，提高了查询、检索的质量和速度。
The system stores spatial data and characteristic data into central database , and provides services to users in server / client mode . as the research emphases of this thesis , several key sub - systems are designed and realized . the digital map input and maintenance subsystem performs format conversion , editing and updating of spatial data ; the rail - track video playing subsystem uses video recording as reference data , then plays , inquires and traces the corresponding frames in synchronous to the scaled mileage , realizing the query of the active picture frames ; the digital map query subsystem fulfills the map query , preview and spelling of digital map orthograph 其中，地形图输入与维护实现了数字地图的格式转换、编辑处理以及空间数据的更新操作，解决了不同格式空间数据的互相转换问题；线路录象播放将线路录像数据作为系统的一种索引数据，活动影像的画面与里程相对应，实现了基于线路录像的播放、查询和检索的功能，实现了基于活动画面的查询检索功能；数字地图子系统完成了图形查询、数字地图与线路正射图像浏览、图幅拼接等功能。
Thus using gis technique to manage the debris flow hazard ' s spatial data would be a suitable method . based on the wholly design of the debris flow hazard database , this thesis begins with setting up the debris flow hazard graph database with mapgis tool . following the work flows , i . e . vectorization , graphic edit , error adjustment and map collection 探讨了在mapgis中如何快捷有效地建立泥石流灾害图形数据库，即按照矢量化、图形编辑、误差校正、图幅拼接等流程进行；选用microsoftaccess建立泥石流灾害属性数据库；通过在图形数据库和属性数据库中设立主关键字来实现图形数据和属性数据的无缝连接。
On the aspect of data model , based on improving and extending the gdf data model , the data model of sde was put forwad . the data model can express multi - section data and semantic relations between different feature layers . it support segment attributions , so can express a segmental attribution of a line feature 在数据模型方面，在gdf数据模型的基础上进行了改进和扩充，提出了sde的数据模型，该模型具有多图幅数据连续性表达、能表达不同层要素之间语义关系、支持段属性，能够表达线要素属性上某一段属性、支持多媒体数据类型等优点，并对数据库中矢量数据的存放方式作了比较实验。
First , the thesis designs a whole geo - spatial data bank . generally , it involves in fundamental information preparation , writing standards , graph layer division , graph digitizing , collection of attribute data , edition , topological treatment , pretreatment , graph splicing , incorporation of attribute data and the final establishment 论文首先对研究区地学空间数据库进行了整体设计，大体经过基础资料准备、制定数字化图层及属性文件格式标准、划分图层、数字化图形与采集属性数据、编辑修改与拓扑处理、进行预处理、图幅拼接与属性数据合并，到地学空间数据库建立。
