Wrapped Polyline Definition

A wrapped polyline is one that utilizes two scales on the same page, wrapping around from one scale to the next. This is a common feature in well log digitizing. For example, the first scale of a well log ranges from 0 to 100 and a second scale ranges from 100 to 500. The polyline starts on the left side at 0 and goes all the way to the right side at 100. Then it goes off the first scale and wraps back to the left side to the second scale, now 200. The example below shows where the polyline goes off the edge on the right and is "wrapped around" back to the left side. When it is wrapped around, it uses the second scale.

This is an example of a wrapped polyline

 with two scales on the same page.