diff --git a/app.py b/app.py
index 665b306..4e9eea0 100644
--- a/app.py
+++ b/app.py
@@ -29,7 +29,7 @@ app.config["MAX_CONTENT_LENGTH"] = 2 * 1024 * 1024 * 1024  # 2GB
 
 MODELS_DIR = os.getenv("MODELS_DIR", "./models")
 UPLOAD_DIR = os.getenv("UPLOAD_DIR", "./uploads")
-OUTPUT_DIR = os.getenv("OUTPUT_DIR", "./output")
+OUTPUT_DIR = os.path.abspath(os.getenv("OUTPUT_DIR", "./output"))
 
 os.makedirs(UPLOAD_DIR, exist_ok=True)
 os.makedirs(OUTPUT_DIR, exist_ok=True)
diff --git a/src/zone_config.py b/src/zone_config.py
index 2e96cad..9bdb64c 100644
--- a/src/zone_config.py
+++ b/src/zone_config.py
@@ -22,31 +22,38 @@ def save_zone_config(config: dict[str, Any], path: str) -> None:
 
 
 def build_static_roi(zone: dict[str, Any], video_w: int, video_h: int) -> TruckROI:
-    """Build a TruckROI from a zone config dict.
+    """Build a TruckROI from a zone config dict, scaling from reference resolution.
 
     The zone dict should have:
       - truck_area: [[x1,y1], [x2,y2], [x3,y3], [x4,y4]] (4-point polygon)
       - count_line: {"x_start": int, "x_end": int, "y": int}
-    Coordinates are in the video's native resolution (no scaling needed
-    if the zone was calibrated for this resolution).
+      - reference_resolution: [w, h] (optional, default [1920, 1080])
+
+    Coordinates are stored at reference_resolution and scaled to actual video_w/video_h.
     """
     truck_pts = zone.get("truck_area", [])
     count_line = zone.get("count_line", {})
+    ref_w, ref_h = zone.get("reference_resolution", [1920, 1080])
 
-    # Compute bounding box of truck_area polygon
+    # Scale factors from reference resolution to actual video
+    sx = video_w / ref_w if ref_w else 1.0
+    sy = video_h / ref_h if ref_h else 1.0
+
+    # Compute bounding box of truck_area polygon (scaled)
     if truck_pts and len(truck_pts) >= 4:
-        xs = [p[0] for p in truck_pts]
-        ys = [p[1] for p in truck_pts]
+        xs = [int(p[0] * sx) for p in truck_pts]
+        ys = [int(p[1] * sy) for p in truck_pts]
         x1 = max(0, min(xs))
         y1 = max(0, min(ys))
         x2 = min(video_w, max(xs))
         y2 = min(video_h, max(ys))
     else:
-        # Fallback: use 50% of frame
         x1, y1 = int(video_w * 0.3), int(video_h * 0.1)
         x2, y2 = int(video_w * 0.75), int(video_h * 0.95)
 
-    line_y = count_line.get("y", int((y1 + y2) / 2))
+    line_y = int(count_line.get("y", (y1 + y2) // 2) * sy)
+    line_x_start = int(count_line.get("x_start", x1) * sx)
+    line_x_end = int(count_line.get("x_end", x2) * sx)
 
     return TruckROI(
         x1=x1, y1=y1, x2=x2, y2=y2,
diff --git a/tests/test_zone_config.py b/tests/test_zone_config.py
index d7397ff..849894c 100644
--- a/tests/test_zone_config.py
+++ b/tests/test_zone_config.py
@@ -17,6 +17,7 @@ def test_build_static_roi_from_zone_config():
     zone = {
         "truck_area": [[100, 50], [110, 300], [400, 310], [390, 40]],
         "count_line": {"x_start": 110, "x_end": 400, "y": 150},
+        "reference_resolution": [640, 480],
     }
     roi = build_static_roi(zone, video_w=640, video_h=480)
     assert roi.line_y == 150
@@ -36,6 +37,18 @@ def test_build_static_roi_scales_coords():
     assert roi.x2 == 1404
 
 
+def test_build_static_roi_scales_from_1080p_to_720p():
+    zone = {
+        "truck_area": [[600, 385], [609, 1076], [1404, 1078], [1381, 343]],
+        "count_line": {"x_start": 577, "x_end": 1401, "y": 330},
+        "reference_resolution": [1920, 1080],
+    }
+    roi = build_static_roi(zone, video_w=1280, video_h=720)
+    assert roi.line_y == int(330 * 720 / 1080)
+    assert roi.x1 == int(600 * 1280 / 1920)
+    assert roi.x2 == int(1404 * 1280 / 1920)
+
+
 def test_list_zone_presets(tmp_path):
     cfg = {"presets": {"p1": {"description": "Zone 1"}, "p2": {"description": "Zone 2"}}}
     p = tmp_path / "zones.json"
diff --git a/zones.json b/zones.json
index 8ee4ab2..7d8c75e 100644
--- a/zones.json
+++ b/zones.json
@@ -3,11 +3,20 @@
     "default": {
       "truck_area": [[600, 385], [609, 1076], [1404, 1078], [1381, 343]],
       "counting_area": [[574, 50], [586, 1077], [1418, 1076], [1397, 50]],
+      "palet": [[612, 628], [1454, 630], [1458, 1074], [608, 1071]],
       "count_line": {"x_start": 577, "x_end": 1401, "y": 330},
+      "reference_resolution": [1920, 1080],
       "left_limit": 0.27578,
       "right_limit": 0.72578,
       "duplicate_circle_radius": 30,
-      "description": "Default zone for 1920x1080 camera"
+      "min_valid_area": 15000,
+      "jarak_toleransi_duplikat": 30,
+      "max_reid_transit_distance": 400,
+      "circle_stay_timeout_sec": 10.0,
+      "inference_stride": 2,
+      "confirm_delay_sec": 0.5,
+      "exit_confirm_delay_sec": 6.0,
+      "description": "Default zone from karung-counting-feedmill-semarang (1920x1080 native)"
     }
   },
   "active_preset": "default"