Zerdly

Survey Area Coverage Calculator

Area a drone can image from speed, effective line spacing and productive time — or a mission plan with turns and per-sortie overhead.

100% FreeRuns in your browserIntermediate
How to use this calculator

Inputs

Area a drone can image from speed, EFFECTIVE line spacing and productive time — or a full mission plan with turns and per-sortie overhead.

Flight
Spacing
Time

Imaging time only — not total airborne time.

More options
Time

A single assumed loss. Not allowed together with an itemised overhead.

Sorties

Enter the values and press Calculate.

Or load an example to see a worked result.

Theoretical coverage
Schematic
Theoretical coverageSchematic of parallel flight strips over a survey area.q = F_c × (1 − side overlap)
Area per second = speed × effective line spacing.
Calculate first: a stale result cannot be exported.

Batch from CSV

One row per calculation, with a header row. Values use the units currently selected in the form above. Up to 10,000 rows; nothing is uploaded.

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

  1. Quick mode: enter speed, EFFECTIVE line spacing (or a raw swath with side overlap) and productive imaging time.
  2. Optionally apply ONE of: an assumed efficiency fraction, or an itemised per-sortie overhead with usable time per sortie.
  3. Geometry mode: describe a rectangle or polygon, footprints, overlaps, turn time and per-sortie overheads.
  4. Read the area, the time budget and, in geometry mode, the segment table.

How it works

Rate = v × q (m²/s); ha/h = v × q × 3600 ÷ 10,000; area = v × q × productive time. A raw swath W becomes q = W × (1 − side overlap) — once.

An efficiency fraction and an itemised overhead estimate the same loss, so using both is refused. Itemised overhead is charged once per sortie.

Geometry mode uses the same lines as the line-spacing and image-count tools: imaging time = Σ length ÷ speed, turns = transitions × turn time, plus per-sortie transit and take-off/landing. The useful area is the target area, never line length × footprint.

Worked example

8 m/s, q 70 m, 18 minutes. 8 × 70 = 560 m²/s; × 1,080 s = 604,800 m² = 60.48 ha. With an assumed efficiency of 0.7: 42.336 ha. A 200 m swath at 65 % side overlap is q = 70 m and gives the same 60.48 ha — the overlap is not removed twice.

Frequently asked questions

Why must the line spacing be the effective one?

Overlapping strips re-image the same ground; only the spacing between lines adds new width.

Will a real flight cover this much?

It is an upper bound. Turns, acceleration, transit and trigger limits all reduce it; geometry mode itemises them.

Related tools

Explore more in Surveying, Coordinates, GIS & CAD.

Cite this tool

Zerdly. (2026). Survey Area Coverage Calculator. Retrieved from https://www.zerdly.com/tools/survey-area-coverage-calculator/

Tip: Enter any known values to calculate the remaining results.

Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.