Photo Overlap Calculator
Computes front and side photo overlap from image footprint and photo spacing for mapping missions.
Enter Values
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the image footprint length and the distance between photos.
- Press Calculate.
- Read the overlap percentage.
How it works
Overlap = (1 − photo spacing ÷ footprint) × 100. Mapping usually targets ~70–80% front overlap.
Worked example
150 m footprint, 30 m spacing. = 80% overlap.
Frequently asked questions
How much overlap do I need?
Typically 75–80% front and 60–70% side for clean photogrammetry; more over forests, water and uniform surfaces.
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- Photogrammetry Accuracy Estimate Calculator
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Cite this tool
Zerdly. (2026). Photo Overlap Calculator. Retrieved from https://www.zerdly.com/tools/photo-overlap-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.