code: def _dota_category():
      """
      Get class id to category id map and category id
      to category name map of dota dataset
      """
      catid2name = {
          0: "background",
          1: "plane",
          2: "baseball-diamond",
          3: "bridge",
          4: "ground-track-field",
          5: "small-vehicle",
          6: "large-vehicle",
          7: "ship",
          8: "tennis-court",
          9: "basketball-court",
          10: "storage-tank",
          11: "soccer-ball-field",
          12: "roundabout",
          13: "harbor",
          14: "swimming-pool",
          15: "helicopter",
      }
      catid2name.pop(0)
      clsid2catid = {i: i + 1 for i in range(len(catid2name))}
      return clsid2catid, catid2name
  
file_path: PaddleDetection/ppdet/data/source/category.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from ppdet.data.source.voc import pascalvoc_label
  from ppdet.data.source.widerface import widerface_label
  from ppdet.utils.logger import setup_logger
label_desc: Use image node_id 4 for calling a global function with example usage: _dota_category() and returns: clsid2catid,  catid2name