class='kw'>fill_colour</span> <span class='kw'>=</span> <span class='st'>"lon"</span>
  , <span class='kw'>stroke_colour</span> <span class='kw'>=</span> <span class='st'>"lat"</span>
  , <span class='kw'>layer_id</span> <span class='kw'>=</span> <span class='st'>"scatter_layer"</span>
  , <span class='kw'>tooltip</span> <span class='kw'>=</span> <span class='st'>"capital"</span>
  , <span class='kw'>legend</span> <span class='kw'>=</span> <span class='no'>T</span>
  , <span class='kw'>legend_options</span>