我一直试图找到一种方法来使用“反向地理编码”服务，使用来自我的HTML表单上的两个文本框的纬度和经度坐标，我必须承认我不确定我是什么需要做的。
我已经设法通过'Geocode'服务（见下面的代码）做到了这一点，但我只是想知道是否有人能够指出我正确的方向我如何调整'Geocode'javascript我必须'反向地理定位'服务。
(function Geocode() {
// This is defining the global variables
var map, geocoder, myMarker;
window.onload = function() {
//This is creating the map with the desired options
var myOptions = {
zoom: 5,
center: new google.maps.LatLng(55.378051,-3.435973),
mapTypeId: google.maps.MapTypeId.ROADMAP,
mapTypeControl: true,
mapTypeControlOptions: {
style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR,
position: google.maps.ControlPosition.BOTTOM
},
navigationControl: true,
navigationControlOptions: {
style: google.maps.NavigationControlStyle.ZOOM_PAN,
position: google.maps.ControlPosition.TOP_RIGHT
},
scaleControl: true,
scaleControlOptions: {
position: google.maps.ControlPosition.BOTTOM_LEFT
}
};
map = new google.maps.Map(document.getElementById('map'), myOptions);
// This is making the link with the 'Search For Location' HTML form
var form = document.getElementById('SearchForLocationForm');
// This is catching the forms submit event
form.onsubmit = function() {
// This is getting the Address from the HTML forms 'Address' text box
var address = document.getElementById('GeocodeAddress').value;
// This is making the Geocoder call
getCoordinates(address);
// This is preventing the form from doing a page submit
return false;
}
}
// This creates the function that will return the coordinates for the address
function getCoordinates(address) {
// This checks to see if there is already a geocoded object. If not, it creates one
if(!geocoder) {
geocoder = new google.maps.Geocoder();
}
// This is creating a GeocoderRequest object
var geocoderRequest = {
address: address
}
// This is making the Geocode request
geocoder.geocode(geocoderRequest, function(results, status) {
// This checks to see if the Status is 'OK 'before proceeding
if (status == google.maps.GeocoderStatus.OK) {
// This centres the map on the returned location
map.setCenter(results[0].geometry.location);
// This creates a new marker and adds it to the map
var myMarker = new google.maps.Marker({
map: map,
zoom: 12,
position: results[0].geometry.location,
draggable:true
});
//This fills out the 'Latitude' and 'Longitude' text boxes on the HTML form
document.getElementById('Latitude').value= results[0].geometry.location.lat();
document.getElementById('Longitude').value= results[0].geometry.location.lng();
//This allows the marker to be draggable and tells the 'Latitude' and 'Longitude' text boxes on the HTML form to update with the new co-ordinates as the marker is dragged
google.maps.event.addListener(
myMarker,
'dragend',
function() {
document.getElementById('Latitude').value = myMarker.position.lat();
document.getElementById('Longitude').value = myMarker.position.lng();
var point = myMarker.getPosition();
map.panTo(point);
}
);
}
}
)
}
})();
更新
首先，非常感谢您发布的代码以及有关Google文档的建议。
根据您的建议，以及我从其他文档中获取的内容，我提出了以下内容。但是，当我单击我的提交按钮时，没有任何反应，几乎就像没有附加命令一样。我没有收到任何错误消息，我已经检查以确保我已将代码链接到正确的字段名称，所有似乎都没问题。我只是想知道，如果你，或者其他任何人都可以看看它，请告诉我哪里出错了。
非常感谢和亲切的问候
(function ReverseGeocode() {
var form, geocoderRequest, latlng, myMarker, point;
window.onload = function() {
//This is creating the map with the desired options
var myOptions = {
zoom: 5,
center: new google.maps.LatLng(55.378051,-3.435973),
mapTypeId: google.maps.MapTypeId.ROADMAP,
mapTypeControl: true,
mapTypeControlOptions: {
style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR,
position: google.maps.ControlPosition.BOTTOM
},
navigationControl: true,
navigationControlOptions: {
style: google.maps.NavigationControlStyle.ZOOM_PAN,
position: google.maps.ControlPosition.TOP_RIGHT
},
scaleControl: true,
scaleControlOptions: {
position: google.maps.ControlPosition.BOTTOM_LEFT
}
};
map = new google.maps.Map(document.getElementById('map'), myOptions);
var latlng = new google.maps.LatLng('Latitude', 'Longitude');
// This is making the Geocode request
geocoder.geocode({'LatLng': latlng}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
if (results[1]) {
map.setZoom(11);
var myMarker = new google.maps.Marker({
position: results[0].geometry.location,
map: map
});
//This fills out the 'Address' text boxe on the HTML form
document.getElementById('Address').value= results[0].geometry.location.latlng();
var point = myMarker.getPosition();
map.panTo(point);
}
}
}
)}})
答案 0 :(得分：1)
从表单中获得纬度和经度后，您可以执行以下操作（为了清楚起见，请使用上面的代码作为起点）：
var latlng = new google.maps.LatLng(latitudeFromForm,longitudeFromForm);
// This is creating a GeocoderRequest object
var geocoderRequest = {
'latlng':latlng
}
// This is making the Geocode request
geocoder.geocode(geocoderRequest, function(results, status) {
// This checks to see if the Status is 'OK 'before proceeding
if (status == google.maps.GeocoderStatus.OK) {
// Do stuff with the result here
}
如果您尚未阅读，可能需要阅读http://code.google.com/apis/maps/documentation/javascript/services.html#ReverseGeocoding的反向地理编码部分。