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1·Contour interval is 10 feet.

等厚线距为10英尺。

2·Such structural features can be identified by contouring directly on either top or bottom surface of the reservoir with a contour interval of 1-5m.

直接以油层顶面（或底面）为准绘制小等高线间距（1—5米）构造图，可显示出微型构造特征。

3·The accuracy of flood area is mostly dependent on the contour interval of map, accuracy of digitizing map, accuracy of DEM, and interval of GRID, detecting resolution of pixels.

对于采用本方法计算淹没区，准确性受地形图等高距大小、数字化采集精度、数字地面模型（DEM）高程精度以及格网间隔大小、像素探测分辨率等因素的影响。