the the line or course. From getting the pace factor by pace or one step, or by the stride or double step, you can use your own pace factor to measure a line or a course. 
Knowing pace factor is very useful in the field of engineering specifically in civil engineering in the field of surveying when you don't have a instrument in measuring a long distance of course or a line. Different people have their own pace factor so every individual differ on other pace factor.
To know the distance of the course you want to measure, it is by getting the product of your pace factor to the sum of the steps or the pacing of the course or line. This is significant for all the engineering for their field works.
