未捕获的语法错误尝试执行反向地理编码

Uncaught SyntaxError trying to do reverse geocoding

本文关键字：执行 编码 语法 错误      更新时间：2023-09-26

我正在尝试进行一些反向地理编码，我制作了一个快速片段来测试我的代码以查看它是否有效。

这是以下代码：

<html>
<style>
/**
* Default attributes for gadget body.
*/
body {
 font-family: Arial;
background: none transparent;
padding: 0px;
}
html, body, #map_canvas {
    margin: 0;
    padding: 0;
    height: 100%;
}
</style>
<body>
<div id="map_canvas"></div> 
<script>
var APIKey = "MyKeyValueIsInHere";   
var geocoder;
var map;
var marker;
var locationTest = 'http://nominatim.openstreetmap.org/reverse?format=json&lat=55.653363&lon=12.547604&zoom=18&addressdetails=1';
var lat = 55.653363;
var lng = 12.547604;
function initialize() {
    var latlng = new google.maps.LatLng(lat,lng);
    // set the options for zoom level and map type
    var myOptions = {
        zoom: 15,
        center: latlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    // create a map in the map_canvas div element
    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
    map.setCenter(latlng);
            var marker = new google.maps.Marker({
                map: map, 
                position: latlng
            });
            alert(locationTest);
            var text = JSON.parse(locationTest);
            var infoWindow = new google.maps.InfoWindow();
            var houseNumber = text.address.house_number;
            var road = text.address.road;
            var suburb = text.address.suburb;
            var zipCode = text.address.postcode;
            var city = text.address.city;
            var address = road + " " + houseNumber + ", " + zipCode + " " + suburb + " i " + city;

            google.maps.event.addListener(marker, 'click', function() {
            infoWindow.setContent(address);
            infoWindow.open(map, this);
            });
}
function loadScript() {
    var script = document.createElement("script");
    script.type = "text/javascript";
    script.src = "http://maps.googleapis.com/maps/api/js?key=" + APIKey + "&sensor=false&callback=initialize";  
    document.body.appendChild(script);
}   
loadScript();   
</script>
</body>
</html>

无论如何，当我运行它时，我会收到一个警报弹出说：http://nominatim.openstreetmap.org/reverse?format=json&lat=55.653363&lon=12.547604&zoom=18&addressdetails=1

基本上，我想做的是在我的谷歌地图上的标记顶部弹出一个信息窗口。信息窗口应该有作为变量地址的文本。

但是当我运行这段代码时，我得到一个

Uncaught SyntaxError: Unexpected token h

在第 45 行，即这一行：

var text = JSON.parse(locationTest);

那么有人知道我如何解决这个问题吗？

提前感谢！

你有

var locationTest = 'http://nominatim.openstreetmap.org/reverse?format=json&lat=55.653363&lon=12.547604&zoom=18&addressdetails=1';

然后

var text = JSON.parse(locationTest);

但是 JSON.parse 希望它的参数是 JSON 编码的字符串：文档。首先需要将网页的内容作为字符串获取，然后将其解析为 JSON。错误消息抱怨"http"前面的"h"。它期望第一个字符为"{"。

在alert声明之后，您可以尝试：

var $e = $('<div></div>'); // a jQuery object that does not affect your displayed page
$e.load('http://nominatim.openstreetmap.org/reverse?format=json&lat=55.653363&lon=12.547604&zoom=18&addressdetails=1', function (response) {
    // This code only runs once the response is available from openstreetmap.org
    var text = JSON.parse(response);
    var infoWindow = new google.maps.InfoWindow();
    var houseNumber = text.address.house_number;
    var road = text.address.road;
    var suburb = text.address.suburb;
    var zipCode = text.address.postcode;
    var city = text.address.city;
    var address = road + " " + houseNumber + ", " + zipCode + " " + suburb + " i " + city;
    google.maps.event.addListener(marker, 'click', function() {
        infoWindow.setContent(address);
        infoWindow.open(map, this);
    });
});
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