Using latitude and longitude is easiest along the equator, where the grid lines formed are roughly square.

沿着赤道使用维度和经度相当简单，形成的网格线大致也是方形的。

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DEM (Digital elevation Model) is a data set of plane coordinate or longitude, latitude, and elevation of the regular square grid points in some region.

数字高程模型(DEM)是一定区域范围内规则格网点的平面坐标及其高程的数据集或者是经、纬度和海拔高度的数据集。

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This paper mainly introduces how to realize plottings of longitude and latitude grid line, standard map fram and type of graph in the geophysical and geochemical map by WIN-SURFER system.

本文主要介绍了如何在WIN-SURFER环境下实现物化探图件中的经纬网绘制、标准图框绘制、曲线类型图绘制方法。

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