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Comment mesurer une hauteur avec votre iPhone
AR height measurement uses the ground plane plus your phone's position to calculate vertical dimension. Works on people, trees, and buildings up to ~30 m.
Apple's Measure app auto-detects people's height. Third-party AR apps extend this to any vertical object. Here's how it works and when accuracy degrades.
Pourquoi mesurer
- Person's height for ordering custom clothes or harness
- Tree height for safety / pruning planning
- Building height for solar / signage
- Ceiling height (alternative method)
Ce qu'il vous faut
- iPhone with Ruler AR
- Height mode
- Level ground for accuracy
Étape par étape
- Stand on level ground. AR Height needs a flat reference plane. Stand on level ground, not sloped, not stairs.
- Open Height mode. In Ruler AR, switch to Height. The app projects a line on the ground at your phone's position.
- Tap the base. Aim at the base of the object (where it meets the ground). Tap to anchor.
- Aim at the top. Tilt the phone upward, keeping the on-screen crosshair on the top of the object. Tap to capture.
- Read the height. The reading appears in your chosen unit (cm, m, ft). Accuracy: ±5% under 10 m, ±10% over.
Conseils
- For trees, measure from outside the drip line for cleanest base detection
- For buildings, very tall (>20 m) measurements degrade, use a laser tape for precision work
Erreurs fréquentes
- Sloped ground, AR ground plane gets confused
- Aiming above the object's actual top, picks up background
Questions fréquentes
Can iPhone measure my own height?
Yes, point the camera at yourself in a mirror, or ask someone to point it at you. Apple Measure auto-detects.
How accurate is AR height vs a tape measure?
Within ±5% for under 5 m. Worse over distance, at 10+ m use a laser distance meter.