我是一名业余程序员,正在使用google maps API处理我想到的项目。长话短说,我试图创建一个具有n个点的平均经度和纬度的变量。我已经知道我有一个lng / lat坐标数组,但我很难将它们转换为一种格式,我可以将其用作谷歌地图LatLng方法的输入。
我已经引用了这个问题,Find the average (center) of lats/lngs以及其他许多网站一个月了,但我无法理解或实施解决方案。我觉得我错过了那些简单的东西,但是我已经对这个问题持续了一个月,并没有到达任何地方。任何建议或帮助都将不胜感激。
//GOOGLE MAPS API SCRIPTS
var streetarray = document.getElementsByName("street");
var cityarray = document.getElementsByName("city");
var geocoder;
var map;
var results;
var mapArray = new Array();
var avgLat;
var avgLng;
function initialize() {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-34.397, 150.644);
var mapOptions = {
zoom: 8,
//centered on Carrollton, Texas -- Change lat,long values to change initial map area
center:
new google.maps.LatLng(32.999173, -96.897413)
}
//change Id reference to the div/container that contains the google map
map = new google.maps.Map(document.getElementById('map'), mapOptions);
}
function codeAddress() {
//Loop through and concate street and city values to find long,lat values for all fields
for (var cName = 0; cName < namearray.length; cName++){
var address = streetarray[cName].value + cityarray[cName].value;
//start geocode copy & paste text from API reference
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var results = results[0].geometry.location;
map.setCenter(results);
var marker = new google.maps.Marker({
map: map,
position: results,
});
//Push lng/lat locations to the mapArray
mapArray.push(results);
//Loop through mapArray to add Lat/Lng values, and then divide by j (number of locations) to find the average
for (var i in mapArray) {
var avgLat = 0;
var avgLng = 0;
var j = 0;
var avgLat = (avgLat + mapArray[i][1]);
var avgLng = (avgLng + mapArray[i][2]);
console.log(mapArray, avgLat, avgLng);
j++;
}
avgLat = avgLat / j;
avgLng = avgLng / j;
var markerCircle = new google.maps.Circle({
center: results,
radius: 15000,
strokeColor:"#0000FF",
strokeOpacity:0.8,
strokeWeight:2,
fillColor:"#0000FF",
fillOpacity:0.4
})
markerCircle.setMap(map);
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}}
答案 0 :(得分:1)
2个问题:
results[0].geometry.location
不是数组,而是一个对象(google.maps.LatLng
)。使用lat()
和lng()
方法检索纬度和经度 var avgLat = 0;
var avgLng = 0;
var j = 0;
。
您必须将其移至循环外部,否则将在每个循环中清除变量。