摘要
介绍“4D”（即数字地面模型、数字正射影像、数字栅格地图和数字线划地图）系列产品的生产流程、关键技术，及其在耕地保护、防灾减灾救灾和城市规划等方面的应用方法。
Digital elevation model, digital orthophoto quarters, digital raster graph anddigital vector graph are combined to be a series of products called '4D'. The production procedure, the key technologies and its application in cultivated land protection,natural disasters preeaution and urban planning are described.
出处
《测绘工程》
CSCD
1997年第3期1-5,共5页
Engineering of Surveying and Mapping
