iGreatCircle™ is GIS application that provides:

(1) calculation of the great circle distance between two points on the specified reference ellipsoid,

(2) calculation of the bearing between two points on the specified reference ellipsoid,

(3) calculation of the destination point on the specified reference ellipsoid based on the starting point, bearing and distance.

Features:

- Supports 23 commonly used reference ellipsoids:
Airy (1830)
Australian National
Bessel 1841 - Ethiopia, Indonesia, Japan, Korea
Bessel 1841 - Namibia
Clarke 1866
Clarke 1880
Everest - Brunei & E. Malaysia (Sabah & Sarawak)
Everest - India 1830
Everest - India 1956
Everest - Pakistan
Everest - W. Malaysia and Singapore 1948
Everest - W. Malaysia 1969
GRS 80 - Geodetic Reference System 1980
Helmert 1906
Hough 1960
Indonesian 1974
International 1924
Krassovsky 1940
Modified Airy
Modified Fischer 1960 (South Asia)
South American 1969
WGS 72 - World Geodetic System 1972
WGS 84 - World Geodetic System 1984

- Supports three (3) geographic coordinate formats: DD (decimal degrees), DMS (degrees, minutes, seconds), and DM (degrees, minutes). Total of 22 format variations.

- Supports five (5) distance units (meter, kilometer, foot, yard, mile)

- Supports four (4) angle units (radian, degree, minute, second)

- Single entry for geographic coordinate: automatic recognition and parsing of the entered format.

- Simple copy and paste exchange of data with other applications.

- High conversion precision: up to 13 digits after the decimal point for all supported formats.

- Determines geographic coordinate of the current location

Examples of the recognized geographic coordinate formats:
DD (decimal degrees) format: 34.848735, -122.03118
DMS (degrees, minutes, seconds) format: 34 50 55.446 N, 122 1 52.25 W
DM (degrees, minutes) format: N34 50.9241, W122 1.8708