It is said that unit of measure for EPSG:3857 is the metre. (from the same source). This means approximately a square of 40,000 x 40,000 kilometers. This length is correct for the equator, but how can it be in general if the circumference at high latitudes is smaller?
雷达卡
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
千斤顶
显身卡