Final answer:
A large scale map that includes grid lines showing latitude and longitude, as well as a compass rose, would be useful for navigational purposes.
Step-by-step explanation:
In order to create an accurate map, a mapmaker needs a way to uniquely and simply identify the location of all the major features on the map, such as cities or natural landmarks.
The purpose of a large scale map that includes grid lines enabling precise navigation and accurate identification of locations by combining a visual scale with geographical coordinates and directional orientation.
Similarly, astronomical mapmakers need a way to uniquely and simply identify the location of stars, galaxies, and other celestial objects.
On Earth maps, we divide the surface of Earth into a grid, and each location on that grid can easily be found using its latitude and longitude coordinate. Astronomers have a similar system for objects on the sky. Learning about these can help us understand the apparent motion of objects in the sky from various places on Earth.
Example: A large scale map that includes grid lines showing latitude and longitude, as well as a compass rose, would be useful for navigational purposes. It would help determine the exact location of a place on the map and provide a reference point for measuring distance and direction.