It's possible to show a 3D sphere published on Google Maps Views, even it is not publish on google maps and still private. Also it is now possible to show a specific streetview location on a map by using its streetview ID (version => 3.2).

{mosmap sv='top'| svpano='MTJYLsFY9NgAAAGur6LBiw'| svautorotate='1'| svaddress='0'| centerlat='51.904144'| centerlon='4.466959'}

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Uploading your photo spheres to Views

Embedding photo spheres on your website is really easy once you’ve contributed them to Google Maps and the Views community (see Google help center to learn how to do this for photo spheres you have on Google+ or your Android device).

Getting the embed code from Views

Once your photo spheres are public on Views, go to your profile page and find the image you want to embed. As shown in the screenshot below, simply click the Share button.

Then in the link field copy the parameter photo. So: 
https://www.google.com/maps/views /view/105688797108202701037 /photo/MTJYLsFY9NgAAAGur6LBiw

Or the IFRAME embed code, look for the “panoid” value within the URL (ex. MTJYLsFY9NgAAAGur6LBiw)

Use this panoid value to set the svpano parameter in the mosmap command.

Getting the embed code from maps.google.com

Click on the location on the map where you want to see the streetview. A streetview option will open with an image of the streetview available. Get the html details of the streetview and get the url of the image. Inside the url of the image the panoid is available:

https://geo0.ggpht.com/cbk ?cb_client=maps_sv.tactile &output=thumbnail&thumb=2 &panoid=etC6EcCXkm_Sp7BJCame4Q &w=374&h=75 &yaw=18&pitch=23 &ll=45.880953,7.624261

Use this panoid value to set the svpano parameter in the mosmap command.

Other examples

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