added subprox

server/flask_app.py

@@ -278,6 +278,19 @@ def elevation_nearest_hill():
     return jsonify(find_nearest_hill(lat, lon, radius_m, step_m, min_prominence_m))
 
 
+@app.get("/api/elevation/grid")
+def elevation_grid():
+    from core.elevation import build_elevation_grid
+
+    lat = request.args.get("lat", type=float)
+    lon = request.args.get("lon", type=float)
+    if lat is None or lon is None:
+        return jsonify({"ok": False, "error": "lat and lon required"}), 400
+    radius_m = request.args.get("radius_m", 200, type=float)
+    step_m = request.args.get("step_m", 0, type=float)
+    return jsonify(build_elevation_grid(lat, lon, radius_m, step_m))
+
+
 @app.get("/api/health")
 def health():
     from core.elevation import elevation_status