基于WebGIS的校园三维电子地图的设计与实现计算机毕业设计外文翻译.docx

The Design and Implementation of 3D Electronic Map of Campus Based on WEBGISI. INTRODUCTIONNowadays,digitalizationandinformatization are the themeofour times.Withthe development of information revolutionandcomputerscience,computer technology has penetrated intoallfieldsofscienceandcaused many revolutionary changes inthese subjects,the ancient cartography also cant escape. Withthe technical and cultural constantly progress, the form and the content of the map change andupdate as well. Asthe computergraphics, geographic information systems(GIS)constantlyapplied to the Web, the conventional way of fabrication and demonstrationhassuffered great change, andtheapplicationoftheMaphas 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 ofthe products come into being is the e-map [1]. With the rapid development of the computer technology, computer graphicstheory, 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 threedimensional maps.This article based on the Northeast Petroleum University and its surroundings designs and creates the three-dimensional electronic map. II. FUNCTIONDESIGNThree-dimensional electronic map system of campus based onWEBGIShas 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 thecorresponding direction of translation. Through dragging mouse, one canseewherever 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 map where will display the current coordinate of the mouse on the map. I