.

src/javascript/HeightMap.js

@@ -41,8 +41,8 @@ class HeightMap {
 
 	addPoint(geoPoint) {
 		if (geoPoint.constructor.name !== "GeoPoint")
-			throw new TypeError("an object of type 'GeoPoint' must be passed.");
-		if (this.points.length > 0 && this.points[0].distance(geoPoint) < 5)
+			throw new TypeError("an object of type 'GeoPoint' must be p1assed.");
+		if (this.points.length > 0 && this.points[this.points.length - 1].distance(geoPoint) < 5)
 			return;
 
 		$("#points").html(this.points.length);