我有一个数据库，其中包含精确到建筑物级别的地址。当我手动将这些手动放入Google地图搜索时，Google地图发现它们没有问题 - 标记出现在正确的建筑物的正上方。不过，当我使用下面的代码将这些相同的地址传递给Google Maps API地址解析器时，标记只会显示在街道上，而不是建筑物中。
我如何提高准确性？
HTML / PHP：
I have a database containing addresses that are accurate to building level. When I put these manually into Google Map's search, Google Maps finds them no problem - the markers appears right over the correct building. However, when I pass these same addresses to the Google Maps API geocoder using the below code, the markers show up only on the street and not the building.
How do I increase the accuracy?
HTML/PHP:
<div id="addressline"><?php echo theaddress(); ?></div>
JS:
function myGeocodeFirst() {
geocoder = new google.maps.Geocoder();
geocoder.geocode( {'address': document.getElementById("addressline").innerHTML},
function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
firstLoc = results[0].geometry.location;
map = new google.maps.Map(document.getElementById("map_canvas"),
{
center: firstLoc,
zoom: 15,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
markers = new google.maps.Marker({
position: firstLoc,
map: map,
});
}
else {
document.getElementById("text_status").value = status;
}
}
);
}
window.onload=myGeocodeFirst;
Google Maps uses a number of different data sources to locate search results on the map.
The entry you are seeing that is "correct" is a Places database entry. See this page and enter you search string (St Clement’s Church, Edge Lane, Chorlton, M21 9JF).
The geocoder gets is designed to return coordinates for postal addresses, there is not enough information in your string for it to return accurate results:
It looks like it is just returning the geocode for the postcode:
Manchester M21 9JF, UK (53.4414411, -2.285287100000005)
It does look like the geocoder does have that location in it. If I use "St Clement’s Church, Edge Lane", it seems to get the "rooftop" geocode (although it reports "APPROXIMATE")
St Clement's Church, 6 Edge Ln, Manchester, Lancashire M21 9JF, UK (53.4406823, -2.283755499999984)
code snippet:
var geocoder, map, service, infowindow, bounds;
function initialize() {
map = new google.maps.Map(
document.getElementById("map_canvas"), {
center: new google.maps.LatLng(37.4419, -122.1419),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var request = {
query: "St Clement’s Church, Edge Lane, Chorlton, M21 9JF"
}
infowindow = new google.maps.InfoWindow();
service = new google.maps.places.PlacesService(map);
bounds = new google.maps.LatLngBounds();
service.textSearch(request, callback);
}
google.maps.event.addDomListener(window, "load", initialize);
function callback(results, status) {
if (status == google.maps.places.PlacesServiceStatus.OK) {
for (var i = 0; i < results.length; i++) {
var place = results[i];
var marker = createMarker(results[i]);
bounds.extend(marker.getPosition())
}
map.fitBounds(bounds);
google.maps.event.trigger(marker, 'click');
}
}
function createMarker(place) {
var placeLoc = place.geometry.location;
var marker = new google.maps.Marker({
map: map,
position: place.geometry.location
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.setContent(place.name);
infowindow.open(map, this);
});
return marker;
}html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}<script src="https://maps.googleapis.com/maps/api/js?libraries=places"></script> <div id="map_canvas"></div>
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