class_docstr: Create a image viz
docstr: Update map template variables specific to image visual
docstr_tok: ["Update","map","template","variables","specific","to","image","visual"]
code: def add_unique_template_variables(self, options):
      """Update map template variables specific to image visual"""
      options.update(
          dict(image=self.image, coordinates=self.coordinates)
      )
  
imports: import codecs
  import json
  import os
  from IPython.core.display import HTML, display
  import numpy
  import requests
  from mapboxgl.errors import TokenError, LegendError
  from mapboxgl.utils import color_map, numeric_map, img_encode, geojson_to_dict_list
  from mapboxgl import templates
label_desc: Use image node_id 2 for calling the ImageViz obj's underlying member method code with example usage: obj.add_unique_template_variables(options) without return types