Which data model uses points and line segments to identify locations on the earth?

• A. Vector model
• B. Raster model
• C. Contour model
• D. Hybrid model

Answer: (D)

Using points and line segments to identify locations on the earth is a feature of the vector data model. The vector model represents geographic features with precise coordinates: points mark exact locations, lines (made of connected line segments) depict linear features like roads or rivers, and polygons define bounded areas. This setup is ideal for pinpointing exact locations and analyzing spatial relationships such as connectivity and adjacency.

In contrast, a raster model stores data as a grid of cells, with values in each cell, rather than explicit coordinates for points and lines. Contour work relates to lines of equal value (often elevation) and can be represented within vector or raster formats, but it isn’t itself a separate primary data model. A hybrid model isn’t a standard core data model for storing geometry. Therefore, the vector model is the correct choice for using points and line segments to identify locations.