问题
I know that similar questions have been posted but I have not found and answer in any of them as it relates to my particular issue.
I have a javascript that uses google maps to place customer zipcodes on a map. The problem I am have is similar to what others have already posted – I get a “over query limit” error.
I have tried different setups using setTimeOut to try to send google the data within the allowable time intervals but I can’t get it to work.
Here is my action:
function initialize()
{
var rowNum = 0 ;
var rowColor = "" ;
var latlng = new google.maps.LatLng(27.91425, -82.842617);
var myOptions =
{
zoom: 7,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);
geocoder = new google.maps.Geocoder();
data.forEach(function(mapData,idx)
{
window.setTimeout(function()
{
geocoder.geocode({ 'address': mapData.address}, function(results, status)
{
if (status == google.maps.GeocoderStatus.OK)
{
var marker = new google.maps.Marker({
map: map,
position: results[0].geometry.location,
title: mapData.title,
icon: getIcon(mapData.type)
});
var contentHtml = "<div style='width:250px;height:90px'><strong>"+mapData.title+"</strong><br />"+mapData.address+"</div>";
var infowindow = new google.maps.InfoWindow({
content: contentHtml
});
google.maps.event.addListener(marker, 'click', function()
{
infowindow.open(map,marker);
});
marker.locid = idx+1;
marker.infowindow = infowindow;
markers[markers.length] = marker;
if (idx%2 == 0)
{
rowColor = 'style="background-color:#00FFFF;"' ;
}
else
{
rowColor = 'style="background-color:#FFFFFF;"' ;
}
var sideHtml = '<div ' + rowColor + ' class="loc" data-locid="'+marker.locid+'"><b>'+mapData.title+'</b><br/>';
sideHtml += mapData.address + '</div>';
$("#locs").append(sideHtml);
//Are we all done? Not 100% sure of this
if(markers.length == data.length) doFilter();
}
else
{
// alert("Geocode was not successful for the following reason: " + status);
}
}, 3000);
});
});
When I run my page using this action, I get back 11 markers even though I have many more than that in my JSON string. The window.setTimeout has absolutely no effect – I’m obviously doing something wrong here.
I would appreciate any help on this matter.
Thanks,
回答1:
I found the answer to my question. I found the following code on the Web and modified it to my needs.
With it, you can load many markers without getting Over Query Limit from Google.
I have tested it with over 100 markers and it works beautifully. The page does not freeze up at all.
I am certain some of you guys can do something much more elegant and efficient but this is a good starting point.
<script type="text/javascript">
//<![CDATA[
// display ani gif
loadingGMap() ;
// delay between geocode requests - at the time of writing, 100 miliseconds seems to work well
var delay = 100;
// ====== Create map objects ======
var infowindow = new google.maps.InfoWindow();
var latlng = new google.maps.LatLng(27.989551,-82.462235);
var mapOptions =
{
zoom: 7,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var geo = new google.maps.Geocoder();
var map = new google.maps.Map(document.getElementById("map"), mapOptions);
var bounds = new google.maps.LatLngBounds();
// ====== Geocoding ======
function getAddress(search, next)
{
geo.geocode({address:search}, function (results,status)
{
// If that was successful
if (status == google.maps.GeocoderStatus.OK)
{
// Lets assume that the first marker is the one we want
var p = results[0].geometry.location;
var lat = p.lat();
var lng = p.lng();
// Output the data
var msg = 'address="' + search + '" lat=' +lat+ ' lng=' +lng+ '(delay='+delay+'ms)<br>';
//document.getElementById("messages").innerHTML += msg;
// Create a marker
createMarker(search,lat,lng);
}
// ====== Decode the error status ======
else
{
// === if we were sending the requests to fast, try this one again and increase the delay
if (status == google.maps.GeocoderStatus.OVER_QUERY_LIMIT)
{
nextAddress--;
delay++;
}
else
{
var reason = "Code "+status;
var msg = 'address="' + search + '" error=' +reason+ '(delay='+delay+'ms)<br>';
// document.getElementById("messages").innerHTML += msg;
}
}
next();
}
);
}
// ======= Function to create a marker
function createMarker(add,lat,lng)
{
var contentString = add;
if (add=='EOF')
{
stopLoadingGMap() ;
}
var addArray = add.split(' ');
var zipcode = addArray.pop();
var zipcode = add.match(/\d{5}/)[0] ;
var image = 'icons/sm_02.png';
var marker = new MarkerWithLabel(
{
position: new google.maps.LatLng(lat,lng),
map: map,
icon: image,
labelContent: zipcode,
labelAnchor: new google.maps.Point(50, 0),
labelClass: "labels", // the CSS class for the label
labelStyle: {opacity: 0.75},
zIndex: Math.round(latlng.lat()*-100000)<<5
});
google.maps.event.addListener(marker, 'click', function()
{
infowindow.setContent(contentString);
infowindow.open(map,marker);
});
bounds.extend(marker.position);
}
// ======= An array of locations that we want to Geocode ========
// use static or build dynamically
// use as many markers as you need – I’ve test with over 100
var addresses = var data = [
{‘StreetAddress1 City State Zipcode’},
{‘StreetAddress2 City State Zipcode’},
{‘StreetAddress3 City State Zipcode’},
{‘StreetAddress14 City State Zipcode’},
…
{‘EOF’},
];
// ======= Global variable to remind us what to do next
var nextAddress = 0;
// ======= Function to call the next Geocode operation when the reply comes back
function theNext()
{
if (nextAddress < addresses.length)
{
setTimeout('getAddress("'+addresses[nextAddress]+'",theNext)', delay);
nextAddress++;
}
else
{
// We're done. Show map bounds
map.fitBounds(bounds);
}
}
// ======= Call that function for the first time =======
theNext();
// This Javascript is based on code provided by the
// Community Church Javascript Team
// http://www.bisphamchurch.org.uk/
// http://econym.org.uk/gmap/
//]]>
</script>
来源：https://stackoverflow.com/questions/16659398/google-maps-over-query-limit