diff --git a/backend/src/landmarks_manager.py b/backend/src/landmarks_manager.py
index 8b4b61f..9d4ce9b 100644
--- a/backend/src/landmarks_manager.py
+++ b/backend/src/landmarks_manager.py
@@ -182,14 +182,14 @@ def count_elements_within_radius(coordinates: Tuple[float, float], radius: int)
         return 0
 
 
-# Creates a bounding box around given coordinates
+# Creates a bounding box around given coordinates, side_length in meters
 def create_bbox(coordinates: Tuple[float, float], side_length: int) -> Tuple[float, float, float, float]:
-
+    
     lat = coordinates[0]
     lon = coordinates[1]
 
     # Half the side length in km (since it's a square bbox)
-    half_side_length_km = side_length / 2.0
+    half_side_length_km = side_length / 2 / 1000
 
     # Convert distance to degrees
     lat_diff = half_side_length_km / 111  # 1 degree latitude is approximately 111 km
diff --git a/backend/src/optimizer_v4.py b/backend/src/optimizer_v4.py
index a98492c..0eecb97 100644
--- a/backend/src/optimizer_v4.py
+++ b/backend/src/optimizer_v4.py
@@ -5,7 +5,6 @@ from typing import List, Tuple
 from scipy.optimize import linprog
 from collections import defaultdict, deque
 from geopy.distance import geodesic
-from shapely import Polygon
 
 from structs.landmarks import Landmark
 
diff --git a/backend/src/parameters/landmarks_manager.params b/backend/src/parameters/landmarks_manager.params
index 0841c24..e0cbe35 100644
--- a/backend/src/parameters/landmarks_manager.params
+++ b/backend/src/parameters/landmarks_manager.params
@@ -1,5 +1,5 @@
 {
-  "city bbox side" : 5,
+  "city bbox side" : 5000,
   "radius close to" : 50,
   "church coeff" : 0.8,
   "park coeff" : 1.2,