From ff10084ba0d416ca11e0738fcff4d016eba782df Mon Sep 17 00:00:00 2001
From: slothful-vassal <89943360+slothful-vassal@users.noreply.github.com>
Date: Thu, 19 Feb 2026 16:43:04 +0100
Subject: [PATCH] skip elevation correction if no valid height information
 returned by valhalla (#821)

---
 web/src/lib/models/gpx/gpx.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/web/src/lib/models/gpx/gpx.ts b/web/src/lib/models/gpx/gpx.ts
index ed364e5d..8ccd01bb 100644
--- a/web/src/lib/models/gpx/gpx.ts
+++ b/web/src/lib/models/gpx/gpx.ts
@@ -195,6 +195,12 @@ export default class GPX {
     }
 
     const heightResponse: ValhallaHeightResponse = await r2.json()
+    const heights = heightResponse.height ?? [];
+    const finiteHeights = heights.filter((height) => Number.isFinite(height)).length;
+
+    if (heights.length > 0 && finiteHeights === 0) {
+      return;
+    }
 
     let heightIndex = 0;
     for (const track of this.trk ?? []) {