diff --git a/src/Logic/GeoOperations.ts b/src/Logic/GeoOperations.ts
index 854b57fb2..09f50154f 100644
--- a/src/Logic/GeoOperations.ts
+++ b/src/Logic/GeoOperations.ts
@@ -10,12 +10,12 @@ import {
     MultiPolygon,
     Point,
     Polygon,
-    Position,
+    Position
 } from "geojson"
 import { Tiles } from "../Models/TileRange"
 import { Utils } from "../Utils"
 
-;("use strict")
+("use strict")
 
 export class GeoOperations {
     private static readonly _earthRadius: number = 6378137
@@ -1051,6 +1051,8 @@ export class GeoOperations {
     }
 
     /**
+     * Converts various types of possible bearings into degrees, with 0 being north, 90 being east.
+     *
      * GeoOperations.parseBearing("N") // => 0
      * GeoOperations.parseBearing("E") // => 90
      * GeoOperations.parseBearing("NE") // => 45
@@ -1064,7 +1066,7 @@ export class GeoOperations {
      * GeoOperations.parseBearing(-270) // => 90
      *
      */
-    public static parseBearing(str: string | number) {
+    public static parseBearing(str: string | number): number {
         let n: number
         if (typeof str === "string") {
             str = str.trim()