title: How to search for all points in a given radius of a zipcode with google maps api?
body: <p>Is there a way with Google Maps API, that I can find all red balloon points (addresses pinned on my google map) within a given radius (in miles) of a certain zip code?</p>
  
  <p>For example... </p>
  
  <ul>
  <li><p>The first input box asks you for your zip code.  Type it in. </p></li>
  <li><p>The second input box (a section box with &lt; options >) asks you for
  the radius in miles, 10 miles, 20 miles, 30 miles..etc</p></li>
  <li><p>Then you click submit</p></li>
  <li><p>Then the google map shows all the addresses (which were stored from a
  json file), on to the google map in red balloons.</p></li>
  </ul>
  
  <p>Is there free learning material on the web that will help me to build something like this? </p>
  
  <p>I've been reading google maps api stuff all morning and haven't found any examples that can offer this.</p>
  
  <p>Thanks!</p>