Additional fixes to get defaults right

Author: flohorovicic

examples/tutorials/z_other_tutorials/json_io/05c_minimal_comparison.py

@@ -60,7 +60,7 @@
             "y": 0.0,
             "z": -20.0,
             "id": 0,
-            "nugget": 0.000001  # Default nugget value
+            "nugget": 0.0  # Default nugget value
         }
     ],
     "orientations": [
@@ -86,8 +86,15 @@
             "c_o": 5.0
         },
         "mesh_extraction": True,
-        "number_octree_levels": 4
-    }
+        "number_octree_levels": 2
+    },
+    "series": [
+        {
+            "name": "default_formations",
+            "surfaces": ["surface1"],
+            "structural_relation": "ERODE"
+        }
+    ]
 }
 
 # Save the JSON model

gempy/modules/json_io/json_operations.py

@@ -150,7 +150,9 @@ def load_model_from_json(file_path: str):
         )
 
         # Calculate default range based on model extent
-        default_range = JsonIO._calculate_default_range(grid_settings['regular_grid_extent'])
+        # default_range = JsonIO._calculate_default_range(grid_settings['regular_grid_extent'])
+        # set as fixed value
+        default_range = 1.7  # Match standard GemPy default
 
         # Create interpolation options with defaults if not provided
         interpolation_options = InterpolationOptions(