基于Google Earth绘制中小比例尺高程图可行性研究

The Feasibility Research of Drawing Medium and Small Scale Elevation Map Based on Google Earth

作为数字城市建设的重要表现形式和技术基础,数字3维已成为当今研究的热点,而3维建模高程是构建数字3维的必要组成部分。介绍一种简单新型的基于Google Earth绘制大比例尺地形图的制作方法,与1∶250 000DEM数据、0.61 m分辨率的Quick Bird影像和0.48 m分辨率的World View-Ⅱ影像进行对比分析,并对该方法制作的大比例尺地形图的质量进行分析与讨论,该方法在保证一定制图精度的条件下,不仅能够快速掌握,而且方便快捷,成本较低,具有一定的创新型和推广价值。

Being the crucial manifestation and technical base of digital city construction, digital 3D is the hot spot of current research. 3D elevation modeling is a crucial part of digital 3D. This paper introduces a simple way of drawing large scale topographic map based on Google Earth which is juxtaposed with 1：250 000 DEM data, 0.61m resolution Quick Bird image, and 0.48 m resolution World View - II image, analyzes and discusses the quality of the large scale map produced with the above method. The method is convenient and quick to grasp, low in cost, and is of certain creation and popularization value.