title: angular js directive to plot marker on google map based on zipcode
body: <p>I am trying to plot zip codes markers instead of lat and logs on google maps.
  Is there any documentation available for this.
  I am using angular js for my work. </p>
  
  <p>the data is as follows. </p>
  
  <pre><code>}
  "pageType": "ZIP",
  "ZIP": {
      "90638": {
          "OVERALL": "320.00"
      },
      "75594": {
          "OVERALL": "2985.0"
      },
      "10997": {
          "OVERALL": "444"
      },
      "90639": {
          "OVERALL": "64.35"
      },
      "75595": {
          "OVERALL": "2562"
      }
  }
  }
  </code></pre>