javascript - google heatmaps including count of points -


i have working code google heatmap. quick overview of does:

1) queries mysql db pull lat/long records (initially) 2) drop down select box allows filtering (basically amends sql query in php) 3) heatmap json array (using php json_encode($sql_results))

so code have right works - however, wish add more map.

my question - possible pull count of results particular location (i'm using postal code generate lat/long) , display them on heatmap?

an example ; 100 results location x ... , zoom in , dissipate heatmap, amend number.

i have tried looking similar functionality can find information on adding markers/images results - need dynamic numbers displaying results.

any help/advice appreciated.

here's relevant code used create heatmap:

<?php $latlng = "select inp.lat, inp.long locations inp"; $results = db_query($latlng);  $mapcoords = mysqli_fetch_all($results, mysqli_assoc);  ?>  <script type="text/javascript">  var places = []; var coords = <?php echo json_encode($mapcoords); ?>;  (var = 0; < coords.length; i++) {     places.push(new google.maps.latlng(coords[i].lat, coords[i].long)); }  var map, pointarray, heatmap; var gradient = [         'rgba(0, 255, 255, 0)',         'rgba(0, 255, 255, 1)',         'rgba(0, 191, 255, 1)',         'rgba(0, 127, 255, 1)',         'rgba(0, 63, 255, 1)',         'rgba(0, 0, 255, 1)',         'rgba(0, 0, 223, 1)',         'rgba(0, 0, 191, 1)',         'rgba(0, 0, 159, 1)',         'rgba(0, 0, 127, 1)',         'rgba(63, 0, 91, 1)',         'rgba(127, 0, 63, 1)',         'rgba(191, 0, 31, 1)',         'rgba(255, 0, 0, 1)'     ];  var data = places;  function initialize() {         var mapoptions = {             zoom: 6,             center: new google.maps.latlng(54.892473,-2.932931),                 maptypeid: google.maps.maptypeid.roadmap          };          map = new google.maps.map(document.getelementbyid('map-canvas'), mapoptions);          pointarray = new google.maps.mvcarray(data);          heatmap = new google.maps.visualization.heatmaplayer({             data: pointarray,             dissipating: true,             radius: 35          });          heatmap.setmap(map);         heatmap.set('gradient', heatmap.get('gradient') ? null : gradient);         heatmap.set('opacity', '0.9');     }  google.maps.event.adddomlistener(window, 'load', initialize);  </script>

so, think looking @ wrong approach - initial idea pull count db of returned rows , display custom marker dynamic text. solution found (and simple implement!) google marker clustering using markerclusterer.js. me, downloaded js, pointed in code , added following: 

<script type="text/javascript" src="markerclusterer.js"></script>  var places = []; var markers = [];  var coords = <?php echo json_encode($mapcoords); ?>;  (var = 0; < coords.length; i++) {     places.push(new google.maps.latlng(coords[i].lat, coords[i].long));     var latlng = new google.maps.latlng(coords[i].lat, coords[i].long);     var marker = new google.maps.marker({'position': latlng});     markers.push(marker); }

`

and @ end set cluster , add options:

var mcoptions = {gridsize: 50, maxzoom: 15};  var markercluster = new markerclusterer(map, markers, mcoptions);

that's pretty - zoom in change in counts , need work on custom markers infowindows. hope helps else in same situation.


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