Elevation data is a good example of a single-band raster dataset, often visualized with a color ramp, as shown in Figure 2.
高程数据就是很好的单级光栅数据的例子，它经常用颜色坡度，如图2所示。
2
The front elevation features a metal ramp leading to the front door and a movable exterior wall that slides open to reveal a wood store.
正面可见一个通向正门的金属斜坡以及一个可移动的外墙，这片外墙可滑动以揭开木制的储物空间。
3
A new spiral trumpet interchange has such advantages as dealing with the large elevation difference, increasing the ramp length, reducing the longitudinal, saving land and so on.