diff --git a/gps_loader.py b/gps_loader.py
index 3c3c4a6..d56cde7 100644
--- a/gps_loader.py
+++ b/gps_loader.py
@@ -9,6 +9,7 @@ class GPSLoader:
             "times": [],
             "points": [],
             "altitudes": [],
+            "altitudes_wgs84": [],
             "speeds": [],
             "directions": [],
             "distances": [],
@@ -45,6 +46,7 @@ class GPSLoader:
             data["times"].append(time)
             data["points"].append(Vec2(lon.value, lat.value))
             data["altitudes"].append(alt)
+            data["altitudes_wgs84"].append(alt_wgs84)
             data["speeds"].append(speed)
             data["directions"].append(dir_)
             data["distances"].append(dist)