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随着电子计算机技术的发展,城市土地规划建设和管理及其各相关专业已采用计算机辅助设计,以往那种将所采集到的测绘信息以线划固化在规定比例尺的图纸上,以满足城市建设快速发展的需要在CAD中已缺乏灵活性,CIS技术的发展作为其主要结构的图形数据需要由数字化地图来生成,为此生产部门要求生产具有便于存贮、查询、修改、更换、提取等多功能的数字化地形图就显得十分迫切了。数字化测图有如下优点:·快速制图避免许多费时的手工操作。
With the development of electronic computer technology, urban land planning, construction and management and its related majors have adopted computer aided design. In the past, the collected surveying and mapping information was line-drawn and cured on the scale sheets to meet the requirements of urban construction The rapid development of the need has been the lack of flexibility in CAD, the development of CIS technology as the main structure of the graphics data needs to be generated by the digital map, for which the production department requires production with easy storage, query, modify, replace, extract, etc. The function of the digital topographic map becomes very urgent. Digital mapping has the following advantages: Rapid mapping avoids many time-consuming manual operations.