Estimation de la distance plutôt que de compter sur l'instabilité de signal.eu.org/osm

server/src/common/utils/calculus.utils.ts

@@ -0,0 +1,23 @@
+const EARTH_RADIUS = 6378137
+
+type Coordinates = {
+  latitude: number
+  longitude: number
+}
+
+type UseDistanceTypes = {
+  from: Coordinates
+  to: Coordinates
+}
+
+export function toRadians(degrees: number) {
+  return (degrees * Math.PI) / 180
+}
+
+export function distanceCoordinates({ from, to }: UseDistanceTypes) {
+  const distance = EARTH_RADIUS * Math.acos(
+    Math.sin(toRadians(to.latitude)) * Math.sin(toRadians(from.latitude)) +
+      Math.cos(toRadians(to.latitude)) * Math.cos(toRadians(from.latitude)) * Math.cos(toRadians(from.longitude) - toRadians(to.longitude)),
+  )
+  return distance
+}