海图边上的米制比例尺 border scales of meters
当比例尺条和文本信息叠加置于地图上(比如雪白的图和白色的比例尺文本)时，这个问题尤其突出。
This is particularly a problem with scale bars and textual information overlaid on a map (such as light white snow imagery and white scale text).
虽然地图上的标示我看得懂，但是因为没有标比例尺，所以我担心下一个乡镇可能要再骑上30公里。
Although the map-sign was understandable, there was no scale at all and I was concerned that the next township might be 30 km away.
海图的基准比例尺是图上一个单位长度与其对应的球面上长度的之比，用分数表示。
The natural scale of a chart is the ratio of a length measured on the chart to a corresponding length measured on the surface of the Earth and is expressed as a fraction.
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