diff --git a/D02_PlanBase/D02_PlanBase_UI_Page.ts b/D02_PlanBase/D02_PlanBase_UI_Page.ts
index 10821c0a9..6d6d4580d 100644
--- a/D02_PlanBase/D02_PlanBase_UI_Page.ts
+++ b/D02_PlanBase/D02_PlanBase_UI_Page.ts
@@ -62,7 +62,8 @@ async function request<T>(path: string, init?: RequestInit): Promise<T> {
 
 /** 서버 두 점 → [시점, 종점] */
 function boundaryPoints(view: PointsView): Array<LonLat | null> {
-  const pick = (p: ServerPoint | null): LonLat | null => (p ? { lon: p.lon, lat: p.lat } : null);
+  const pick = (p: ServerPoint | null): LonLat | null =>
+    p ? { lon: +p.lon.toFixed(DIGITS), lat: +p.lat.toFixed(DIGITS) } : null;
   return [pick(view.start), pick(view.end)];
 }