title: Draw polygon and detect if a marker is inside
body: <p>I have these coordinates stored in a field of a database for drawing a polygon on a google map.  I want to detect if a marker is inside this polygon:</p>
  
  <pre><code>(37.15730677081955, -3.7892532348632812),
  (37.13486648362684, -3.7593841552734375), 
  (37.16059015678727, -3.7027359008789062)
  </code></pre>
  
  <p>Does anyone know how to get it?</p>