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Update golf-gps.js

master
jeonlab 2024-06-24 08:09:20 -04:00 committed by GitHub
parent 74b06548d7
commit 5428c6fc4b
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1 changed files with 3 additions and 4 deletions
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apps/golf-gps/golf-gps.js
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@ -81,10 +81,9 @@ function readOneCourseData() {
} }
function distanceCalc(lat1, long1, lat2, long2) { function distanceCalc(lat1, long1, lat2, long2) {
const distLat = (lat1 - lat2) * 111151.3; // 111151.3 = (2*6368500*pi)/360, 6368500 ~ Earth radius at latitude 42.3° const delLat = Math.abs(lat1 - lat2) * 111151.3; // 111151.3 = (2*6368500*pi)/360, 6368500 ~ Earth radius at latitude 42.3°
const averageLat = (lat1 + lat2) / 2; const delLong = Math.abs(long1 - long2) * 111151.3 * Math.cos(radians((lat1 + lat2)/2));
const distLong = (long1 - long2) * 111151.3 * Math.cos(radians(averageLat)); return Math.sqrt(delLat * delLat + delLong * delLong) / 0.9144; // in yards
return Math.sqrt(distLat * distLat + distLong * distLong) / 0.9144; // in yards
} }
function mainMenu() { function mainMenu() {