>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>lat</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>elevation</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>polyline</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>radius</span> <span class='kw'>=</span> <span class='fl'>10</span>,
  <span class='kw'>fill_colour</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>fil