addGeoJson Function inverse Lat and Lng? - google-maps-api-3

Question

I'm developing a google map function to display GEOJson Data in a map.
According to the web, the following points are in montreal :
Point1 : lat = 45.555 and lng = -73.555
Point2 : lat = 45.666 and lng = -73.666
http://www.latlong.net/c/?lat=45.666&long=-73.666
So I've constructed my GEOJson data as follow (displaying two markers in Montreal):
var data_default = {
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [45.555, -73.555]
}
},
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [45.666, -73.666]
}
}
] };
However, for this data, the following function :
map.data.addGeoJson(data);
Is not indicated the points in Montreal .... to have Montreal I should inverse the latitude and lng of the "coordinates" .. so my two points should have the following coordinates : [-73.555, 45.555 ] [-73.666, 45.666] instead of [45.555, -73.555 ] [45.666,-73.666]
Is any one can explain to me why the addGeoJson of Google maps api is reading the points in an inverse way ?
Thank you

Answer 1

GeoJSON specifies coordinates as [longitude,latitude]. You have the coordinates backwards.
From the spec:
Point coordinates are in x, y order (easting, northing for projected coordinates, longitude, latitude for geographic coordinates):
code snippet:
function initialize() {
var map = new google.maps.Map(
document.getElementById("map_canvas"), {
center: new google.maps.LatLng(45.555, -73.555),
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var data_default = {
"type": "FeatureCollection",
"features": [{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [-73.555, 45.555]
}
}, {
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [-73.666, 45.666]
}
}]
};
map.data.addGeoJson(data_default);
}
google.maps.event.addDomListener(window, "load", initialize);
html,
body,
#map_canvas {
height: 100%;
width: 100%;
margin: 0px;
padding: 0px
}
<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map_canvas"></div>