Unlike most road maps, topographic maps can be used to find

1: the best route to a town 20 km away.
2: the temperature at any place on the map
3:the elevation above sea level.
4:the distance between two locations

I'll be glad to check your answer.

Topographic maps are specifically designed to showcase the physical features of a specific area, including its elevations, contours, and terrain. These maps are quite useful for a variety of purposes, but they are especially adept at providing information about the elevation above sea level of different points on the map. Therefore, the correct answer is option 3: the elevation above sea level.

To locate the elevations on a topographic map, you can follow these steps:
1. Obtain a topographic map of the desired area: Topographic maps can be found online or in physical form in specialized stores or libraries.
2. Look for the contour lines: Contour lines are one of the key features of topographic maps. These lines connect points with the same elevation, enabling you to visualize the relief of the area.
3. Read the elevation values from the map: Topographic maps often feature labeled contour lines that indicate elevations at specific points, such as peak heights, valley depths, or hills.
4. Interpret the contour lines: By understanding the contour intervals and spacing between contour lines, you can estimate the elevation of any point on the map, even if it is not specifically labeled.

To summarize, topographic maps are primarily used to find the elevation above sea level. While they do provide valuable information about physical features and can assist in planning routes, determining distances, and understanding the topography, they do not directly provide information on the best route to a specific town or the temperature at a given location.