diff --git a/src/views/index.vue b/src/views/index.vue
index 93df3ae..c3ff360 100644
--- a/src/views/index.vue
+++ b/src/views/index.vue
@@ -1180,7 +1180,7 @@ function getBoundingBoxAndSize(pointsArr) {
   const height = Math.round(haversineDistance(minLat, minLon, maxLat, minLon));
 
   // 左下角参考点
-  const refPoint = {lon: minLon, lat: minLat};
+  const refPoint = {lon: maxLon, lat: minLat};
 
   // 找出距离 refPoint 最近的点
   let nearestPoint = null;