地理信息系统文献翻译——摘要

城管网的管道是纵横交错，并有3D（三维）分布的。涉及到大量的属性信息和空间数据。为了用一个更加直观的方式来表现它，UPNVS（市管网可视化系统）被设计。专题地图服务是它的一部分。本文中，我们提出了专题地图服务，上传和编辑数据服务，信息重视服务和三维查看服务。而3D显示服务集中于显示简单地图和唯一值服务。它实现了从2D专题地图到3D的转变而且用不同的颜色来反映管道的不同的属性值。此项应用加强了专题地图服务的真实性和可视性。最后，我们把它插入到UPNVS中，能容易的显示模式和趋势且为决策提供信息。同时，结果也可应用于其它的可视化系统和3D专题地图中。

关键词：专题地图；管道网；ArcGIS Engine；三维的可视化服务

一、引言

城市管网由供水，排水，煤气，暖气，电信和工业管道组成。它们是城市基础设施的重要部分，且被视为城市的生命线。然而各种地下管线纵横交错复杂结构，并在不同的深度，如果我们没有全面，准确的地下管线信息，我们将是盲目的，且会导致重大损失。据了解每个管线都包括许多的信息，例如线路编号，状态，面积，和直径等。包含有潜在有用信息的数据量正在快速增长。数据里的复杂关系和分层结构使得数据的可视化任务更加的吃力。 因此，可视化系统设计是为了地下管网，而其中的二维和三维的专题地图服务是重要的组成部分。

传统的制作专题地图的方法是基于地理信息系统（GIS）且只能应用于一个图层：地图。专题地图在地图的区域上显示不同的要素分布。而我们的设计包括4个管线：供水，排水，燃气和供热。每个管道都有自己的图层。

问题是：如何建立一个既包括地图又包括这些管线的文件。以及如何使用ArcGIS Engine来制作管网专题地图服务。以致地下管道不同的要素能用管线显示出来。所以，本文提出了一种解决方案：提供一个专题地图可视化服务，它可以插入到现有的UPNVS中。以便，用户可以看到管道的信息与专题地图。它也使得用户可以比较要素，并快速的找出信息。除此之外，系统维护人员可以直观地修改管道的属性值。

本文的其余部分组织如下所示：相关工作的研究在第二节；第三节详细地介绍了基于gis的城市管网可视化系统的专题地图服务的设计；第四节介绍了我们专题地图服务的实现；及一些结果在第五节中......

Abstract: Urban pipe network pipelines are criss-crossing and have 3D (three-dimension) distribution. Plenty of attribute information and spatial data are involved. In order to display it in a more intuitive way, UPNVS (urban pipe network visualization system) is designed. The Thematic Maps service is a part of it. In this paper, we propose the Thematic Maps service, upload and edit data service, information attention service and 3D viewing service. While 3D display service concentrates on displaying simple map and unique value map. It implements the transit from 2D thematic maps to 3D and reflects the different property values of pipelines with different colors. This application enhances Thematic Maps service lively and visibility. Finally, we plug it to our UPNVS which can show the patterns and trends easily and provide the information for decisionmaking. At the same time, the results can also be applied to othervisualization  system  and 3D thematic maps.

Keywords:  Thematic  maps;  pipe  network;  ArcGIS  Engine; Thr-

ee dimensional Visualization service

1. Introduction

Urban pipe network consists of water supply, drain, gas, heating, telecom and industrial pipelines. They are important parts of the city infrastructure and considered to be the lifeline of the city. Whereas various pipelines crisscross underground with intricate structure, and lay in different depth, if we do not have the information of the underground pipes completely and exactly, we will be blind and it will lead significant loss. It is known that every pipe contains much information, such as line-id, state, area, and diameter etc. The amount of data containing potentially useful information is growing rapidly. Complex relationships and hierarchical structures within the data make the task of visualizing these data even more demanding. Therefore a visualization system is designed for the underground pipe network, and of which 2D and 3D thematic map services are important parts.

The traditional methods of making Thematic Maps are based on Geographical Information System (GIS) and applied to only one layer: map. The Thematic Maps show different factors’ distribution.......