A method of distinguishing watershed borderline, of ascertaining water flow direction on a slope, and of calculating watershed parameters with digital elevation model is introduced and discussed.
探讨了利用数学高程模型识别流域分水线、确定坡面水流方向以及计算流域参数的方法。
This paper studies frequency planning of terrestrial digital HDTV and presents an approximate calculating method of HDTV service area.
本文研究地面数字HDTV的频率规划，提出HDTV服务面积的一种近似计算方法。
The calculating equations for orientation elements of common digital camera are deducted using DLT method based on digital array coordinator assumption.
推导了采用基于数字阵列坐标的直接线性变换方法的非量测普通数码相机方位元素解算方法。
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