三维立体渲染图是地形图信息的重要组成部

分， 它反映了地形的立体形态， 模拟了地形的表面灰

度， 非常直观 ［&］ 。用户可以根据不同的需要， 对于同-Surfer contains three document window types: the plot document, worksheet document, and grid node editor. Maps are displayed and created in the plot document. The worksheet document displays, edits, transforms, and saves data in a tabular format. The grid node editor displays and edits Z values for the selected grid.