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介绍了我国主要牧区雪灾遥感监测中的数字地形信息的计算、存储、格式转换和传输技术。数字地形信，包在整个雪灾遥感监测评价系统中是一种较重要的地理信息，它主要用来对空间信息进行定位控制，并为空间分析操作和应用模型分析提供能反映地理分布特征的信息。对数字地形信息的计算模型、特点及存贮结构进行了较为详细的介绍。数字地形信，包是一种栅格数据，而作为雪灾遥感监测评价系统的ＰＣＡＲＣ／ＩＮＦＯ空间操作是一种比较完备的地理信息系统，在数据格式上有其自己的特点，数字地形信息只有经过一定的格式转换和数据传输，才能在ＰＣＡＲＣ／ＩＮＦＯ中进行各类空间操作，达到整个系统设计的目的。如何将数字地形信息转换成ＰＣＡＲＣ／ＩＮＦＯ能接收的栅格数据结构文件是整个雪灾遥感监测评价系统中的一个重要外部数据格式转换接口，对该部分内容也进行了详细的介绍。
The calculation, storage, format conversion and transmission technology of digital terrain information in snow disaster remote sensing monitoring in China’s major pastoral areas are introduced. The digital terrain letter is a kind of important geographic information in the entire snow disaster remote sensing monitoring and evaluation system. It is mainly used to locate and control the spatial information and provide the information for the spatial analysis operation and applied model analysis to reflect the geographical distribution characteristics . The digital terrain information computing model, characteristics and storage structure are described in more detail. Digital terrain information, packet is a kind of raster data, and PCARC / INFO space operation as snow disaster remote sensing monitoring and evaluation system is a relatively complete geographic information system, has its own characteristics in the data format, digital terrain information only after Certain format conversion and data transmission, in order to carry out all kinds of space operations in PCARC / INFO, to achieve the purpose of the entire system design. How to convert digital terrain information into a raster data structure file that PCARC / INFO can receive is an important external data format conversion interface in the entire snow disaster remote sensing monitoring and evaluation system, and the content of this part is also introduced in detail.