To get the pano identifier (pano), I developed a small HTML page where you can get some of its parameters (zoom / Pov, pitch and heading) and get the HTTP URL of the Street View Image URL.
Remember to replace YOUR_API_KEY with your own API key (obviously)
Have fun with google maps!
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <style> html, body { height: 95%; margin: 0; padding: 0; } #map, #pano { float: left; height: 95%; width: 45%; } </style> </head> <body> <div id="tray"> <button id="doer" onclick="doThings()">do it</button> <span id="resulting"></span> </div> <div id="map"></div> <div id="pano"></div> <script> var panorama, map; var APIkey= "YOUR_API_KEY" function initialize() { var fenway = { lat: 42.345573, lng: -71.098326 }; var agbar = new google.maps.LatLng(41.4035482, 2.1894355); map = new google.maps.Map(document.getElementById('map'), { center: agbar, zoom: 14 }); panorama = new google.maps.StreetViewPanorama( document.getElementById('pano'), { position: agbar, pov: { heading: 34, pitch: 10 } }); map.setStreetView(panorama); } function doThings() { console.log("doing things"); document.getElementById("resulting").innerHTML = "https://maps.googleapis.com/maps/api/streetview?size=640x640" +"&pano=" + panorama.getPano() + "&heading=" + panorama.getPov().heading + "&pitch=" + panorama.getPov().pitch + "&fov="+ (180/ (Math.pow(2, panorama.getZoom()?panorama.getZoom():1)))+ "&key=" + APIkey; </script> <script async defer src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initialize"> </script> </body> </html>
Instructions: create an html file, copy the code, replace the API key, open the html file in a browser, click the "do it" button.
Additional links can be found on Google: https://developers.google.com/maps/documentation/javascript/streetview#StreetViewPanoramas