What does Grid System refer to in geographic studies?

• A. Pattern formed as the lines of latitude and longitude cross one another.
• B. A map legend showing symbols and colors.
• C. The scale used to measure distances on a map.
• D. A database that stores spatial data.

Answer: (A)

The grid system is the pattern formed by the crossing lines of latitude and longitude, creating a coordinate framework that lets us locate any point on Earth. Latitudes run east-west, measuring distance north or south from the Equator, while longitudes run north-south, measuring distance east or west from the Prime Meridian. When these lines intersect, they form a global grid that can be used to give precise coordinates for maps, charts, and navigation. This is what makes it possible to say exactly where a place is on the globe using numbers like 40°N, 75°W, for example.

The other map elements you might hear about—map legends that explain symbols and colors, scales that show how distance on the map relates to real-world distance, and databases that store spatial data—play different roles but do not define the grid framework itself.