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streetview.html
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streetview.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Street View</title>
<style>
html, body, #map-canvas {height: 100%; margin: 0px; padding: 0px;}
</style>
<!--<script type="text/javascript" src=".config.js"></script>-->
<script>
// Function to load the Google Maps API with the key specified dynamically from the config; see: http://stackoverflow.com/a/31342500
function loadGmaps () {
var apiKey = '<?php require_once ('./.config.php'); echo $config['googleApiKey']; ?>';
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'https://maps.googleapis.com/maps/api/js?v=3&key=' + apiKey + '&loading=async&callback=streetviewWithDirection';
document.body.appendChild(script);
}
// Load Google Maps API when ready
window.onload = loadGmaps;
// Function to parse query string arguments: see: http://stackoverflow.com/a/2880929
function getQueryParameters ()
{
var urlParams;
(window.onpopstate = function () {
var match,
pl = /\+/g, // Regex for replacing addition symbol with a space
search = /([^&=]+)=?([^&]*)/g,
decode = function (s) { return decodeURIComponent(s.replace(pl, ' ')); },
query = window.location.search.substring(1);
urlParams = {};
while (match = search.exec(query)) {
urlParams[decode(match[1])] = decode(match[2]);
}
})();
return urlParams;
}
// Functions to validate a lat/lon; see: http://stackoverflow.com/a/39842070
function isLatitude (lat) {
return isFinite(lat) && Math.abs(lat) <= 90;
}
function isLongitude (lng) {
return isFinite(lng) && Math.abs(lng) <= 180;
}
// Function to create a Street View panel which looks in the correct direction
// Effectively this gets the nearest Street View panorama to a specified point, then adjusts the camera angle to face that point (which is not done by default)
// See: https://developers.google.com/maps/documentation/javascript/examples/streetview-embed
// See: http://stackoverflow.com/a/11950935/180733
// See: http://stackoverflow.com/a/8381895/180733
function streetviewWithDirection ()
{
// Get the query string parameters
var get = getQueryParameters ();
// Ensure a latitude and longitude are specified
if (!get['latitude'] || !get['longitude']) {
alert ('Error: No latitude/longitude pair supplied.');
return false;
}
// Valid the latitude and longitude
if (!isLatitude (get['latitude']) || !isLongitude (get['longitude'])) {
alert ('Error: Invalid latitude/longitude pair supplied.');
return false;
}
// Convert to float
get['latitude'] = parseFloat(get['latitude']);
get['longitude'] = parseFloat(get['longitude']);
// Set max distance
var streetViewMaxDistance = 100;
// Create a point
var point = new google.maps.LatLng(get['latitude'], get['longitude']);
// Initialise (but do not immediately display) the panorama at the specified location
// #!# Need to disable indoor
var panoramaOptions = {
position: point,
visible: false
};
var panorama = new google.maps.StreetViewPanorama(document.getElementById("map-canvas"), panoramaOptions);
// Instantiate the Street View service so that the heading can be looked up
var streetViewService = new google.maps.StreetViewService();
streetViewService.getPanoramaByLocation(point, streetViewMaxDistance, function (streetViewPanoramaData, status) {
// If the panorama has been found, determine the direction ('heading'); this is basically the angle of the resolved streetview image location from the initial requested point
if(status === google.maps.StreetViewStatus.OK){
var oldPoint = point;
point = streetViewPanoramaData.location.latLng;
var heading = google.maps.geometry.spherical.computeHeading(point,oldPoint);
} else {
var heading = 90; // Arbitrary
//alert('Not found, using fixed heading direction.');
}
// Show the panorama, at the specified location and direction ('heading'), and set it to be visible
panorama.setPosition(point);
panorama.setPov({
heading: heading,
zoom: 1,
pitch: 0
});
panorama.setVisible(true);
});
}
</script>
</head>
<body>
<div id="map-canvas"></div>
</body>
</html>