Presentation can change; meaning must not drift
Cropping, resizing, derivatives and infographics
Images may be cropped for different screens, resized, compressed, color-balanced or converted to a modern file format. Those changes must not add, remove or relocate factual features in a way that changes what the scene communicates. Responsive versions stay linked to their source asset by recorded derivative information and hashes.
Maps, diagrams and infographics are explanatory works, not photographs. They identify their underlying source or method, use accessible labels, and separate measured values from illustration. Decorative artwork is kept out of the reading order; meaningful graphics receive text alternatives or nearby explanation.