diff --git a/lib/getpositions.py b/lib/getpositions.py
index 467e677..801ec30 100644
--- a/lib/getpositions.py
+++ b/lib/getpositions.py
@@ -230,6 +230,16 @@ def get_rack_positions(msp):
     #         print_polyline(e)
     return ret
 
+def scan(dxf_source:ezdxf.document.Drawing):
+    layer_names_inside =  dxf_source.layers.entries.keys()
+    alle_block_defs = set(dxf_source.blocks.block_names()) 
+    used_block_names = set(insert.dxf.name for insert in dxf_source.modelspace().query("INSERT"))
+    ret = dict()
+    ret['all_layers'] = layer_names_inside
+    ret['used_blocks'] = used_block_names
+    ret['all_blocks'] = alle_block_defs
+    return ret
+    
 def to_json(d, pretty: bool = True) -> str:
     return json.dumps(d, indent=2 if pretty else None, ensure_ascii=False, default=str) #ensure_ascii false für darstellung von "ue"
 
@@ -265,6 +275,7 @@ if __name__ == '__main__':
     parser.add_argument('-r', '--rack', action='store_true', help='fetch all positions of all cable racks')
     parser.add_argument('-w', '--write', action='store', help='write results into a json file')
     parser.add_argument('-c', '--console', action='store_true', help='print results to output')
+    parser.add_argument('-n', '--scan', action='store_true', help='print all layer of racs, distributes and equiment not empty')
 
 
     args = parser.parse_args()
@@ -272,13 +283,19 @@ if __name__ == '__main__':
     out_dir = os.environ.get('PROJECT_DATA')
     work_dir = os.environ.get('PROJECT_WORK')
     config_dir = os.environ.get("PROJECT_CFG")
-    filename = args.filename
 
+    filename = args.filename
     (dxf_path, dexists) = check_file_in_work(work_dir, filename)
 
+
     doc = get_dxf_file(dxf_path) # type: ignore
     msp = doc.modelspace()
 
+    if args.scan:
+        res = scan(doc)
+        print(to_json(res))
+        sys.exit()
+
     res_pos = dict()
     res_dist = dict()
     res_rac = dict()