What type of data structure does a raster model represent?

A raster model represents a continuous grid of pixel values, which is fundamental to how geographic information is stored and analyzed. Each pixel in a raster corresponds to a specific location on the Earth's surface and contains a value that represents information such as temperature, elevation, or land cover. This grid structure allows for the representation of continuous phenomena, enabling analysis of variations across space. The uniformity and fixed arrangement of pixels make raster data particularly suitable for applications like remote sensing and environmental modeling, where the characteristics being analyzed are continuous rather than discrete.

The other options describe different types of data structures that do not apply to the raster model. A series of interlinked tables refers to a vector model, which organizes data into points, lines, and polygons. A hierarchical structure pertains to tree-based models found in certain databases, not the grid-based approach of raster data. Lastly, a database model for storing text data does not relate to how geographic information is structured in a raster format. Thus, the choice that accurately describes the raster model is the continuous grid of pixel values.