What part of a map you measure distance from one point to another

scale

Explanation: Hi, map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. For example, on a 1:100000 scale map, 1cm on the map equals 1km on the ground.

Using a map scale is important when trying to determine the actual distance represented on a map. Most map scales are in terms of miles per inch. The ratio between miles and inches will depend on how large an area the map is representing.

"the day we found the sharks' teeth" i would say highlight the element of the plot as it sets its boundaries and centers the adventures of them being on a boat and cleaning spit of sand.