利用数字摄影测量系统JX4生产DEM技术探讨

The technology of producing DEM with digital photogrammetric system JX4

数字高程模型(DEM)是对地形地貌的一种离散的数字表达,是对地面特性进行空间描述的一种数字方法、途径,是GIS重要的空间数据之一。DEM数据获取的方法有很多种,本文主要阐述了利用数字摄影测量系统JX4生产DEM的方法及关键技术,同时为了保证生产DEM的质量可靠,提出了质量控制的有效措施。

DEM is a discrete and digital interpretation of topography. As an important type of spatial data for GIS, DEM functions as a digital way of describing the features on the surface. Among many methods of acquiring DEM, this paper focuses on the techniques when using JX4, a digital photogrammetric system. Measures to assure the quality of DEM is also discussed.