Massive terrain rendering methods have improved considerably with the great development of graphics hardware. But the error calculation methods for terrain models do not pick up the pace. Most rendering methods still use the traditional recursive errors,which are not compatible with current rendering methods. This paper proposes a new error calculation method for this issue. The proposed error metric directly describes the simplified model’s deviation from the original model,thus it is more precise than the previous methods. By using the linear interpolation ability of current graphics hardware,a high calculation performance is achieved,large terrain models can be processed promptly with the proposed method.%随着图形硬件的高速发展，大规模地形的可视化技术相比传统方法发生了很大变化，但是地形的误差计算方法却没有作出相应的改进，大多算法依然使用保守的迭代式误差，不能很好地与当前绘制算法相适应。针对这个问题，提出一种新的误差定义和计算方式。该误差直接描述简化模型同原始模型之间的差异，比以前的算法更为准确。误差的计算利用图形硬件的插值能力进行加速，大规模地形数据的误差计算能够在较短时间内完成。
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