Geodetic Distance Between Any Two Locations On The Earth Spheroid
Based on the Andoyer Algorithm (theoretical maximum error about ±50 meters)
FIRST LOCATION SECOND LOCATION
Optional First Place Name

Enter 1st   Latitude , Longitude   as Deg.ddd   or as D M S
Optional Second Place Name

Enter 2nd  Latitude , Longitude as Deg.ddd  or as D M S
Coordinates Convention:   Latitude Neg/Pos = South/North     and     Longitude Neg/Pos = West/East
Jay Tanner - v1.11 - 2022 - PHP v5.6.11
 ```GENERAL INFORMATION The program's initial default startup values are randomized. This program computes the geodetic distance between two locations on the Earth geoid. The maximum theoretical error is on the order of ±50 meters, but the computed distance is rounded to the nearest 0.1 (km|mi|nmi). --------------------------------------------------------------------------- LATITUDE/LONGITUDE CONVENTIONS The standard longitude convention is Neg/Pos = West/East. Everyone essentially knows that when we refer to latitudes, positive means north and negative means south of the equator. Longitudes are a different matter and more than one longitude convention can be used. Although the program was designed with the standard coordinates system in mind, where negative longitudes are west and positive longitudes are to the east of Greenwich, if you prefer the opposite convention where east is negative, then you can use that convention instead. Due to the basic symmetry of the geoid, either convention will work equally well, so it doesn't really matter which one you use as long as you're consistent and apply the same latitude/longitude convention to both locations. --------------------------------------------------------------------------- GEOGRAPHIC COORDINATE FORMATS Coordinates may be obtained from https://www.gps-coordinates.net and copied/pasted directly to this program interface in the same Lat,Lon format as "+46.789, -76.543" and separated by a comma. The coordinates may be entered as decimal degrees or as degrees, minutes and seconds, separated by spaces. In either case, the coordinates are separated by a comma and are not restricted to purely integer values. EXAMPLES OF VALID COORDINATE VALUES +123.456789 = D = 1 element = Degrees only +12 34.56 = D M = 2 elements = Degrees and Minutes -00 00 12.345 = D M S = 3 elements = Degrees, Minutes and Seconds For Paris, France, the coordinates could be entered as: +48.8363889, +2.3372222 or as +48 50 11.000, +02 20 14.000 or as 48 50 11, 2 20 14 NOTE: Different sources may differ on the precise geographic coordinates of some major world locations. Some places are too large to apply a single set of fixed coordinates. But certain fixed points can serve as benchmarks. --------------------------------------------------------------------------- UNITS AND BASIC DATA: UNITS: 1 Statute mile 1.609344 km 1 Nautical mile 1.852 km EARTH DATA: Equatorial Radius 6378.137 km = 3963.191 mi = 3443.918 nmi Polar Radius 6356.752 km = 3949.903 mi = 3432.372 nmi Polar Flattening 1/298.257 = 0.003352813 ```