Simple coordinate sorting

sortCoordinates.js

/**
 * Sorting markers in rows from left to right. Because geolocation can be pretty
 * detailed we can't just sort it as is, we need a math to make it feel natural.
 *
 * How this works:
 * - Prioritise sorting on latitude (y-axis)
 *   - multiply the difference and round it this will "group" locations in rows.
 *   - 30 is an arbitrary value that felt good in my case, higher values will make tighter rows.
 *   - (Using `1` as multiplier you will see the sorting jumps long distances from left to right.)
 * - If 0 (same row), sort by longitude, with full precision
 *   - Depending on your dataset you might still see some jumps
 */
const sortedMakers = markers.sort((a, b) => {
  return Math.round(b.lat * 30) - Math.round(a.lat * 30) || a.long - b.long;
});