What is a scroll map?
A scroll map is a tool that measures the average fold on a web page by automatically calculating where people scroll the most—and then stop, for both desktop and mobile users.
What did people use before GPS?
To do this, Columbus used celestial navigation, which is basically using the moon, sun, and stars to determine your position. Other tools that were used by Columbus for navigational purposes were the compass, hourglass, astrolabe, and quadrant.