计算机毕业设计外文译翻译.doc

（ 二 〇年 The Design and Implementation of 3D Electronic Map of Campus Based on WEBGIS I. INTRODUCTION Nowadays, digitalization and informatization are the theme of our times. With the development of information revolution and computer science, computer technology has penetrated into all fields of science and caused many revolutionary changes in these subjects, the ancient cartography also cant escape. With the technical and cultural constantly progress, the form and the content of the map change and update as well. As the computer graphics, geographic information systems (GIS) constantly applied to the Web, the conventional way of fabrication and demonstration has suffered great change, and the application of the Map has extended dramatically owing to the development of advanced information technology. Under these circumstances, cartography will be faced with promising prospect. It has branched out into many new products. One of the products come into being is the e-map [1]. With the rapid development of the computer technology, computer graphics theory, remote sensing technology, photogram metric technology and other related technology. Users require handling and analysis of three-dimension visualization, dynamic interactivity and show their various geo-related data, so much attention should be paid to the research of three dimensional maps. This article based on the Northeast Petroleum University and its surroundings designs and creates the three-dimensional electronic map. II. FUNCTIONDESIGN Three-dimensional electronic map system of campus based on WEBGIS has general characteristics of the common maps. Through pressing the arrow keys (Up, Down, Left, And Right) on the keyboard, one can make the map move towards the corresponding direction of translation. Through dragging mouse, one can see wherever he likes. Using the mouse wheel, you can control a maps magnitude, according to the users needs to view different levels of map. The lower left of the ma