code: def add_dimension(cls, dataset, dimension, dim_pos, values, vdim):
      data = dataset.data.copy()
      geom_col = cls.geo_column(dataset.data)
      if dim_pos >= list(data.columns).index(geom_col):
          dim_pos -= 1
      if dimension.name not in data:
          data.insert(dim_pos, dimension.name, values)
      return data
  
imports: import sys
  import warnings
  from collections import defaultdict
  import numpy
  import pandas
  from holoviews.core.util import isscalar, unique_iterator, unique_array
  from holoviews.core.data import Dataset, Interface, MultiInterface, PandasAPI
  from holoviews.core.data.interface import DataError
  from holoviews.core.data import PandasInterface
  from holoviews.core.data.spatialpandas import get_value_array
  from holoviews.core.dimension import dimension_name
  from holoviews.element import Path
  from ..util import asarray, geom_to_array, geom_types, geom_length
  from .geom_dict import geom_from_dict
label_desc: Use image node_id 17 for calling the GeoPandasInterface obj's underlying member method code with example usage: obj.add_dimension(cls, dataset, dimension, dim_pos, values, vdim) and returns: data