Avoid geocode limit on custom google map with multiple markers_问答_开发者

Avoid geocode limit on custom google map with multiple markers

开发者 https://www.devze.com 2023-04-10 07:21 出处：网络

I\'ve created a custom map with around 150 markers. It only plots around 20 or so before it hits the geocode limit.

I've created a custom map with around 150 markers. It only plots around 20 or so before it hits the geocode limit.

What can I incorporate into my code to avoid hitting the limit?

UP开发者_如何学PythonDATE: How can I add a time delay to each request say 0.25seconds (or whatever the lowest I can get away with)?

I've tried a few different suggestions but I can't seem to get them to work with my code so please could any examples use my code.

So instead of sending all the requests almost instantly in a for-loop, I thought it might be better that when a geocode returns a result, to send the next one. If the result coming back is a OVER_QUERY_LIMIT, resend the request with an increase on the delay. I haven't found the sweet spot timeout that produces the fewest OVER_QUERY_LIMIT's, but at least it will create all the markers (for valid addresses). It takes about 45 seconds or so to finish on my machine.

<!DOCTYPE html>
<html>
<head>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css"
rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var geocoder;
var map;
var infowindow = new google.maps.InfoWindow();

var places = [];
var popup_content = [ /* all your popup_content */];
var address = [/* all of your addresses */];
var address_position = 0;

var timeout = 600;

function initialize() {
    geocoder = new google.maps.Geocoder();
    var latlng = new google.maps.LatLng(52.40, -3.61);
    var myOptions = {
      zoom: 8,
      center: latlng,
      mapTypeId: 'roadmap'
    }
    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
    addMarker(address_position);
}

function addMarker(position)
{
    geocoder.geocode({'address': address[position]}, function(results, status)
    {
        if (status == google.maps.GeocoderStatus.OK) {
            places[position] = results[0].geometry.location;

            var marker = new google.maps.Marker({
                position: places[position],
                map: map
            });

            google.maps.event.addListener(marker, 'click', function() {
                if (!infowindow) {
                    infowindow = new google.maps.InfoWindow();
                }
                infowindow.setContent(popup_content[position]);
                infowindow.open(map, marker);
            });
        }
        else
        {
            if (status == google.maps.GeocoderStatus.OVER_QUERY_LIMIT)
            {
                setTimeout(function() { addMarker(position); }, (timeout * 3));
            }
        }
        address_position++;
        if (address_position < address.length)
        {
            setTimeout(function() { addMarker(address_position); }, (timeout));
        }
    });
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="height: 80%; top:10px; border: 1px solid black;"></div>
</body>
</html>

i'm certainly no codemaster, but instead of using a timeout i just keep calling the function from within the function (resource hog i'm sure). i iterate through my counter if i'm successful, otherwise i call my function with the current counter value if unsuccessful. at this rate, i may loop 1000 times for my 37 polylines (or markers if that's what your drawing), but i believe it will finish at the earliest time possible. here's an example - i first call my plot function onclick as plot(0):

function plot(k)
{
...
if (status == google.maps.GeocoderStatus.OK)
        {
            draw(r.routes[0]);
            if(k<origArray.length) plot(k++);
        }
else plot(k)
...
}