如何知道谷歌地图API中的标记是否在多边形内
当您单击地图中的任意位置时，会创建 1 个新标记并创建多边形 它工作正常，但现在我的问题是我无法得到来自数据库的标记是否在多边形内部，如何知道它？？？
<?php include("config.php"); ?>
<?php $result = mysql_query("select * from `googlemaps`"); ?>
<html>
<head>
<title>Google Maps</title>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var poly, map;
var markers = [];
var path = new google.maps.MVCArray;
function initialize() {
var LatLng = new google.maps.LatLng(23.183, 75.767);
map = new google.maps.Map(document.getElementById("map"), {
zoom: 12,
center: LatLng,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
function createMarker(point, title) {
var infowindow = new google.maps.InfoWindow({
content: "<span style='color:blue;'>"+title+"</span>"
});
var marker = new google.maps.Marker({
position: point,
map: map,
title:title
});
marker.Image ='https://d3szoh0f46td6t.cloudfront.net/public/1626980/small';
google.maps.event.addListener(marker, "click", function() {
infowindow.open(map,marker);
});
return marker;
}
<?php
if(mysql_num_rows($result)>0)
{
while( $data = mysql_fetch_array($result) )
{ ?>
createMarker(new google.maps.LatLng(<?php echo $data['lat']; ?>, <?php echo $data['lon']; ?>), "<?php echo $data['title']; ?>");
<?php }
}
?>
poly = new google.maps.Polygon({
strokeWeight: 3,
fillColor: '#5555FF'
});
poly.setMap(map);
poly.setPaths(new google.maps.MVCArray([path]));
google.maps.event.addListener(map, 'click', addPoint);
}
function addPoint(event) {
path.insertAt(path.length, event.latLng);
var marker = new google.maps.Marker({
position: event.latLng,
map: map,
draggable: true
});
markers.push(marker);
marker.setTitle("#" + path.length);
google.maps.event.addListener(marker, 'click', function() {
marker.setMap(null);
for (var i = 0, I = markers.length; i < I && markers[i] != marker; ++i);
markers.splice(i, 1);
path.removeAt(i);
}
);
google.maps.event.addListener(marker, 'dragend', function() {
for (var i = 0, I = markers.length; i < I && markers[i] != marker; ++i);
path.setAt(i, marker.getPosition());
document.getElementById("abc").innerHTML=path.setAt(i, marker.getPosition());
}
);
}
</script>
</head>
<body style="margin:0px; padding:0px;" onLoad="initialize()">
<div id="map" style="width:500px; height:500px;"></div>
<div id="abc"></div>
</body>
</html>
When You click on anywhere in map 1 new marker created and make polygon
its working fine but now my problem is i can't get is my marker which is coming from database is inside polygon or not, how to know it???
<?php include("config.php"); ?>
<?php $result = mysql_query("select * from `googlemaps`"); ?>
<html>
<head>
<title>Google Maps</title>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var poly, map;
var markers = [];
var path = new google.maps.MVCArray;
function initialize() {
var LatLng = new google.maps.LatLng(23.183, 75.767);
map = new google.maps.Map(document.getElementById("map"), {
zoom: 12,
center: LatLng,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
function createMarker(point, title) {
var infowindow = new google.maps.InfoWindow({
content: "<span style='color:blue;'>"+title+"</span>"
});
var marker = new google.maps.Marker({
position: point,
map: map,
title:title
});
marker.Image ='https://d3szoh0f46td6t.cloudfront.net/public/1626980/small';
google.maps.event.addListener(marker, "click", function() {
infowindow.open(map,marker);
});
return marker;
}
<?php
if(mysql_num_rows($result)>0)
{
while( $data = mysql_fetch_array($result) )
{ ?>
createMarker(new google.maps.LatLng(<?php echo $data['lat']; ?>, <?php echo $data['lon']; ?>), "<?php echo $data['title']; ?>");
<?php }
}
?>
poly = new google.maps.Polygon({
strokeWeight: 3,
fillColor: '#5555FF'
});
poly.setMap(map);
poly.setPaths(new google.maps.MVCArray([path]));
google.maps.event.addListener(map, 'click', addPoint);
}
function addPoint(event) {
path.insertAt(path.length, event.latLng);
var marker = new google.maps.Marker({
position: event.latLng,
map: map,
draggable: true
});
markers.push(marker);
marker.setTitle("#" + path.length);
google.maps.event.addListener(marker, 'click', function() {
marker.setMap(null);
for (var i = 0, I = markers.length; i < I && markers[i] != marker; ++i);
markers.splice(i, 1);
path.removeAt(i);
}
);
google.maps.event.addListener(marker, 'dragend', function() {
for (var i = 0, I = markers.length; i < I && markers[i] != marker; ++i);
path.setAt(i, marker.getPosition());
document.getElementById("abc").innerHTML=path.setAt(i, marker.getPosition());
}
);
}
</script>
</head>
<body style="margin:0px; padding:0px;" onLoad="initialize()">
<div id="map" style="width:500px; height:500px;"></div>
<div id="abc"></div>
</body>
</html>
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
您可能会问如何检查此 javascript 或 php。我不知道这些领域有 GIS 框架。
大多数空间数据库（例如我使用过的 SQL Server/Postgresql）都提供了诸如 ST_Contains 或 ST_Distance 之类的功能，您可以使用它们。我认为这是 OpenGIS 规范的一部分。
我想你可能正在使用 MYSQL。所以可能只需要搜索一个函数。
You might be asking how to check this javascript or php. I am not aware of a GIS framework in these areas.
Most of the spatial databases (like SQL Server/Postgresql which I have worked with) provide features like ST_Contains or ST_Distance which you can make use of. I think this is part of OpenGIS specification.
I think you might probably be using MYSQL. So may just need to search for a function.