Great-Circle Distance

Haversine distance on a 6,371 km sphere. Field ranging, not a cadastral baseline.

Geospatial & Survey

Haversine distance on a 6,371 km sphere. Field ranging, not a cadastral baseline.

App id: GEO-02. Reference version 1.0.

How to fill it

Fill the inputs. The tool shows the outputs.

On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.

Formula

d = 2 R atan2(√a, √(1−a))

Inputs

Name	Unit
Latitude 1 (camera)	`deg`
Longitude 1 (camera)	`deg`
Latitude 2 (camera)	`deg`
Longitude 2 (camera)	`deg`

Outputs

Name	Unit
Distance (hero result)	`m`

Diagnose

Observations are context. They do not pass or fail a structure. See Diagnose.

When	Observation	Severity
`distance m > 1_000_000`	Long spherical distance	caution

Assumptions

Spherical Earth. Identical points yield zero.

Provenance

Same R = 6,371,000 m as the in-app map ranging.