Vector and bitmap graphics – zooming into resolution and file size

Computer ScienceDigital ApplicationsAges 15–16

The same drawing is built two ways: a vector image stores each shape's formula, so it redraws crisply at any zoom level, while a bitmap image stores a grid of pixels, so zooming in reveals jagged squares. Students drag the zoom slider, drag the canvas to pan the view, and change the pixel grid resolution and the number of shapes. File size updates instantly: bitmap size equals width times height times color depth divided by 8, while vector size depends only on the number of shapes, never on the zoom level.