Research On The Three-dimensional Application Of Road Design System Based On Google Earth

Google Earth is a virtual three-dimensional visualization of digital earth model, domestic and international applications based on Google Earth endless process of building the road some of the features using Google Earth has began to show in the world. As science and technology and the rapid development of computer technology and the improvement of people's building requirements, the traditional method of road design and construction concept in many cases can not meet the specific requirements, how to use Google Earth software features supporting the design and road works building is a very interesting topic.From the Google Earth application and research in the current situation of domestic and international, introduction and analysis of the Google Earth in the road construction project of significance and prospects, was proposed based on Google Earth aid for road alignment and design methods, is technically feasible, economically rational. Finally, the combination of practical implementation of the method is part of the function module, that is, planning and design modules based on Google Earth, Google Earth-based simulation module, and key technical problems were carried out on detail and use examples to validate.This study are as follows:(1) scientific method of system engineering constructed road design based on Google Earth three-dimensional model, and describes the overall objective of the system, the overall structure, function modules and workflow, and key technical problems were studied in detail;(2) sets out planning and design subsystem based on Google Earth's basic function of the coordinate transformation and the use of Google Earth service road alignment carried out a detailed description and research;(3) access to data using Google Earth aid for AutoCAD fine design, how to obtain data on key issues such as narrative;(3) describes the simulation-based evaluation of Google Earth the basic functions of subsystems, linear evaluation of the simulation animation and in-depth analysis of key issues.