Of course, these hills are much lower and do not reach the 200-metre contour line.

That's why you have to look at the contour lines.

There's always some intriguing landmark just over the next contour line.

The greater the number of contour lines, the darker the crater would look from the air.

This is equivalent to saying that while moving along the contour line for the value of can vary.

Both were designed to run along a contour line.

When maps with contour lines became common, the idea spread to other applications.

With an altimeter, you can follow a contour line as if it were a road.

The model was moved to within the contour lines of the superimposed map.

The process involved cutting the contour lines on a series of plates which were then stacked.