In GIS, the raster data model represents spatial information as:
Choose the correct answer
Points, lines, and polygons with attribute tables
A grid of cells (pixels), each with a single value (elevation, land use, etc.)
Triangulated irregular networks only
Only road networks
Correct Answer
B. A grid of cells (pixels), each with a single value (elevation, land use, etc.)
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Raster = grid of equal-sized cells (pixels). Each cell has one attribute value. Good for continuous data (DEM, satellite imagery, rainfall). Vector = points, lines, polygons with precise coordinates + attributes. Good for discrete features (roads, parcels). GIS uses both models; conversion between them is possible.
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