Switch from Vincenty to Karney for distance calculations, fixes #64

dvdoug · Aug 3, 2024 · 9ef2b1f · 9ef2b1f
1 parent 3e283ee
commit 9ef2b1f
Show file tree

Hide file tree

Showing 7 changed files with 754 additions and 89 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 ### Changed
 - Updates to data for Czechia, Denmark, ETRS89, Germany, Martinique, Portugal, St Helena, UK and WGS84
+- Switched from Vincenty to Karney algorithm for calculating distance between two Geographic points
 - Minimum PHP version increased to 8.1
 
 ## [5.8.0] - 2024-02-03

diff --git a/docs/distance_calculations.rst b/docs/distance_calculations.rst
@@ -8,8 +8,8 @@ PHPCoord can calculate the distance between two ``Point``\s via the ``calculateD
         Point $to,
     ): Length
 
-* The distance between two ``ProjectedPoint``\s is calculated via Pythagoras
-* The distance between two ``GeographicPoint``\s or two ``GeocentricPoint``\s is calculated via Vincenty's formula
+* The distance between two ``ProjectedPoint``\s is calculated via Pythagoras' theorem
+* The distance between two ``GeographicPoint``\s or two ``GeocentricPoint``\s is calculated via Karney's formula
 * The distance between two ``VerticalPoint``\s is calculated as simple difference
 
 Example