Javascript – How to do a simple zip code map showing boundaries with Google Maps API V3

google-maps-api-3javascript

I need to display an interactive map with zip codes showing their boundaries and have different colors for the zip codes like this:

http://www.usnaviguide.com/zip.htm

Enter in a US zip code and click on "Find Zip code".

Perhaps I am overlooking it, but I've not been to find examples of this and documentation talking about this specifically at Google Maps API documentation. I've trying doing a view source on the above web page link, but it doesn't seem obvious to me how it works. There is also other stuff on the page which I don't know if it's part of what I need or not.

Some simple code examples would be very helpful! Thanks!

Best Answer

Here is a zipcode map for the US that I put together with FusionTablesLayers:

http://www.geocodezip.com/geoxml3_test/v3_FusionTables_zipcode_map.html

It doesn't have different colors, but you could change that.

John Coryat made that map using a tile server, you can do the same with Google Maps API v3 custom maps.

code snippet from example:

google.load('visualization', '1', {'packages':['corechart', 'table', 'geomap']});
var map;
var labels = [];
var layer;
var tableid =  1499916;

function initialize() {
    geocoder = new google.maps.Geocoder();
  	map = new google.maps.Map(document.getElementById('map_canvas'), {
    center: new google.maps.LatLng(37.23032838760389, -118.65234375),
    zoom: 6,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  });
  
  layer = new google.maps.FusionTablesLayer(tableid);
  layer.setQuery("SELECT 'geometry' FROM " + tableid);
  layer.setMap(map);

  codeAddress("11501" /*document.getElementById("address").value*/ );

  google.maps.event.addListener(map, "bounds_changed", function() {
    displayZips();
  });
  google.maps.event.addListener(map, "zoom_changed", function() {
    if (map.getZoom() < 11) {
      for (var i=0; i<labels.length; i++) {
        labels[i].setMap(null);
      }
    }
  });
}

function codeAddress(address) {
    geocoder.geocode( { 'address': address}, function(results, status) {
      if (status == google.maps.GeocoderStatus.OK) {
        map.setCenter(results[0].geometry.location);
        var marker = new google.maps.Marker({
            map: map, 
            position: results[0].geometry.location
        });
        if (results[0].geometry.viewport) 
          map.fitBounds(results[0].geometry.viewport);
      } else {
        alert("Geocode was not successful for the following reason: " + status);
      }
    });
  }
  		
function displayZips() {
  //set the query using the current bounds
  var queryStr = "SELECT geometry, ZIP, latitude, longitude FROM "+ tableid + " WHERE ST_INTERSECTS(geometry, RECTANGLE(LATLNG"+map.getBounds().getSouthWest()+",LATLNG"+map.getBounds().getNorthEast()+"))";   
  var queryText = encodeURIComponent(queryStr);
  var query = new google.visualization.Query('http://www.google.com/fusiontables/gvizdata?tq='  + queryText);
  // alert(queryStr);

  //set the callback function
  query.send(displayZipText);

}
 

  var infowindow = new google.maps.InfoWindow();
		
function displayZipText(response) {
if (!response) {
  alert('no response');
  return;
}
if (response.isError()) {
  alert('Error in query: ' + response.getMessage() + ' ' + response.getDetailedMessage());
  return;
} 
  if (map.getZoom() < 11) return;
  FTresponse = response;
  //for more information on the response object, see the documentation
  //http://code.google.com/apis/visualization/documentation/reference.html#QueryResponse
  numRows = response.getDataTable().getNumberOfRows();
  numCols = response.getDataTable().getNumberOfColumns();
/*  var queryStr = "SELECT geometry, ZIP, latitude, longitude FROM "+ tableid + " WHERE ST_INTERSECTS(geometry, RECTANGLE(LATLNG"+map.getBounds().getSouthWest()+",LATLNG"+map.getBounds().getNorthEast()+"))";   
*/

  for(i = 0; i < numRows; i++) {
      var zip = response.getDataTable().getValue(i, 1);
      var zipStr = zip.toString()
      while (zipStr.length < 5) { zipStr = '0' + zipStr; }
      var point = new google.maps.LatLng(
          parseFloat(response.getDataTable().getValue(i, 2)),
          parseFloat(response.getDataTable().getValue(i, 3)));
      // bounds.extend(point);
      labels.push(new InfoBox({
	 content: zipStr
	,boxStyle: {
	   border: "1px solid black"
	  ,textAlign: "center"
          ,backgroundColor:"white"
	  ,fontSize: "8pt"
	  ,width: "50px"
	 }
	,disableAutoPan: true
	,pixelOffset: new google.maps.Size(-25, 0)
	,position: point
	,closeBoxURL: ""
	,isHidden: false
	,enableEventPropagation: true
      }));
      labels[labels.length-1].open(map);
  }
  // zoom to the bounds
  // map.fitBounds(bounds);
}

google.maps.event.addDomListener(window,'load',initialize);
#map_canvas { width: 610px; height: 400px; }
<script type="text/javascript" src="http://www.google.com/jsapi"></script>         
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="http://google-maps-utility-library-v3.googlecode.com/svn/trunk/infobox/src/infobox.js"></script>
<script type="text/javascript" src="http://geoxml3.googlecode.com/svn/branches/polys/geoxml3.js"></script>


<form> 
 	    <span class="style51"><span class="style49">Show</span>:</span> 
<input id="address" type="text" value="11501" ></input>
<input id="geocode" type="button" onclick="codeAddress(document.getElementById('address').value);" value="Geocode"></input>	  
<div id="map_canvas"></div>

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