Ecology occupancy naive estimate calculator

Calculate naive observed occupancy and surveyed site fraction with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use naive observed occupancy and surveyed site fraction to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

JSON site detection histories;1 detected,0 not detected,−1 unvisited
[[1,0,0],[0,0,0],[-1,-1,-1],[0,1,-1]]
Naive observed occupancy
0.666667
Surveyed site fraction
0.75
Completed visit fraction
0.666667

Try another scenario

JSON site detection histories;1 detected,0 not detected,−1 unvisited
[[1,0,0],[0,1,0],[-1,-1,-1],[0,1,-1]]
Naive observed occupancy
1
Surveyed site fraction
0.75
Completed visit fraction
0.666667
Calculation method

Calculation method

Naive observed occupancy

Detected sites / sites with at least one completed visit; no imperfect-detection correction.

Surveyed site fraction

Sites with completed visit / all supplied sites.

Completed visit fraction

Nonmissing visits / all supplied site-visit slots.

Symbols and units
a
JSON site detection histories;1 detected,0 not detected,−1 unvisited

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Sites, detection histories, visit counts. Returns Observed occupancy and detection coverage. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Share this page
Share this calculator

Leave unchecked to share the page without your entered values.