What does the raster data model use to represent locations on the earth?

• A. A grid of cells (pixels)
• B. Points and lines
• C. Contours
• D. 3D mesh

Answer: (A)

Locations in the raster model are represented as a regular grid of cells (pixels). Each cell covers a small on-the-ground area and holds a value describing whatever is being stored (like color, brightness, or elevation). The position of a feature is inferred from the cell that contains it, with precision tied to the cell size—the smaller the cells, the more detail. This differs from vector models, which use discrete points and lines, contours that are lines representing values, or a 3D mesh made of triangles. Raster is ideal for continuous data such as imagery or elevation surfaces because space is treated as a uniform grid.