mySQLデータベースにある都市を使用して緯度と経度の配列を作成しようとしています。これは私がこれまでに持っているものです。javascriptで配列変数を設定し、内部のフィールドをエコーアウトしようとしています。「マーカー」配列が読み取られ、マーカーがGoogleマップの目的の場所に表示されます。
編集：これがスクリプト全体です
<script type="text/javascript">
var directionDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var mapOptions = {
zoom: 5,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map_canvas'),
mapOptions);
directionsDisplay.setMap(map);
var markers = [
<?php
//orgnize fans by city
$query = "SELECT city, state, COUNT(*) fans FROM users GROUP BY city ORDER BY fans DESC";
$result = mysql_query($query) or die(mysql_error());
while($row = mysql_fetch_array($result)){
//pulls the city, state code from the database and stores it as a string in $address
$address = urlencode('"' . $row['city'] . ", " . $row['state'] . '"');
$googleApi = 'http://maps.googleapis.com/maps/api/geocode/json?address=%s&sensor=false';
$json = file_get_contents(sprintf($googleApi, $address));
$resultObject = json_decode($json);
$location = $resultObject->results[0]->geometry->location;
$lat = $location->lat;
$lng = $location->lng;
echo "{ lat: ".$lat.", lng: ".$lng.", name: ".'"'.$row['city'].", ".$row['state'].'"'."},";
}
?>
];
// Create the markers ad infowindows.
for (index in markers) addMarker(markers[index]);
function addMarker(data) {
// Create the marker
var marker = new google.maps.Marker({
position: new google.maps.LatLng(data.lat, data.lng),
map: map,
title: data.name
});
// Create the infowindow with two DIV placeholders
// One for a text string, the other for the StreetView panorama.
var content = document.createElement("DIV");
var title = document.createElement("DIV");
title.innerHTML = data.name;
content.appendChild(title);
var streetview = document.createElement("DIV");
streetview.style.width = "200px";
streetview.style.height = "200px";
content.appendChild(streetview);
var infowindow = new google.maps.InfoWindow({
content: content
});
// Open the infowindow on marker click
google.maps.event.addListener(marker, "click", function() {
infowindow.open(map, marker);
});
// Handle the DOM ready event to create the StreetView panorama
// as it can only be created once the DIV inside the infowindow is loaded in the DOM.
google.maps.event.addListenerOnce(infowindow, "domready", function() {
var panorama = new google.maps.StreetViewPanorama(streetview, {
navigationControl: false,
enableCloseButton: false,
addressControl: false,
linksControl: false,
visible: true,
position: marker.getPosition()
});
});
}
// Try HTML5 geolocation
if(navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = new google.maps.LatLng(position.coords.latitude,
position.coords.longitude);
var infowindow = new google.maps.InfoWindow({
map: map,
position: pos,
content: 'Your Current City'
});
map.setCenter(pos);
}, function() {
handleNoGeolocation(true);
});
} else {
// Browser doesn't support Geolocation
handleNoGeolocation(false);
}
}
function handleNoGeolocation(errorFlag) {
if (errorFlag) {
var content = 'Error: The Geolocation service failed.';
} else {
var content = 'Error: Your browser doesn\'t support geolocation.';
}
var options = {
map: map,
position: new google.maps.LatLng(60, 105),
content: content
};
var infowindow = new google.maps.InfoWindow(options);
map.setCenter(options.position);
}
function calcRoute() {
var start = document.getElementById('start').value;
var end = document.getElementById('end').value;
var waypts = [];
var checkboxArray = document.getElementById('waypoints');
for (var i = 0; i < checkboxArray.length; i++) {
if (checkboxArray.options[i].selected == true) {
waypts.push({
location:checkboxArray[i].value,
stopover:true});
}
}
var request = {
origin: start,
destination: end,
waypoints: waypts,
optimizeWaypoints: true,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
var route = response.routes[0];
var summaryPanel = document.getElementById('directions_panel');
summaryPanel.innerHTML = '';
// For each route, display summary information.
for (var i = 0; i < route.legs.length; i++) {
var routeSegment = i + 1;
summaryPanel.innerHTML += '<b>Route Segment: ' + routeSegment + '</b><br>';
summaryPanel.innerHTML += route.legs[i].start_address + ' to ';
summaryPanel.innerHTML += route.legs[i].end_address + '<br>';
summaryPanel.innerHTML += route.legs[i].distance.text + '<br><br>';
}
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
HTMLを開くと、initializeを呼び出して、キャンバスを作成します。
<body onload="initialize()">
<div id="map_canvas" style="width: 1100px; height: 450px;">map div</div>