Facade Footprint & GSD Calculator

H30T · P1 · M3E · M3T — On-wall GSD & coverage. Pitch is in degrees below horizon.

Brand #1A1A1A · Gold

Inputs

Drone height AGL (m) Building height (m) Gimbal pitch γ (° below horizon) Aim at mid-height (B/2)? Aim height (m) Horizontal overlap (%) Vertical overlap (%) Groundspeed (m/s)

H30T Thermal · 1280×1024 · 12 µm · 24 mm · DFOV 45.2°

γ = 0° is level to horizon. γ = 90° is straight down (nadir). This tool computes on-wall GSD and footprint (vertical facade), not ground GSD.

2D Diagram (Side View)

Stand-off (m)

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Slant range R (m)

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Building coverage (%)

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Outputs

GSD horizontal (cm/px)

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GSD vertical (cm/px)

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GSD anisotropy (vert / horiz)

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Footprint width on wall (m)

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Footprint height on wall (m)

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Building height covered (m)

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Horizontal step (m)

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Spacing between passes along the façade.

Vertical step (m)

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Spacing between stacked rows / up-down runs.

Trigger interval (s)

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Based on vertical step and groundspeed.

For façade work, GSD is measured on the wall, not the ground. Vertical GSD stretches with angle (1 / cos γ), so pixels aren’t square on the wall even though they are on the sensor.