Decoding the Google Maps embedded parameters

Question

The context

I would like to be able to extract the location of Google Maps embedded in a website (random example found at the bottom of this website).

Answer 1

Akubik's answer brought me on track. The parameter I describe is, despite its coordinate-like param1:param2-look, an identifier.

I was not able to find out what param1 is, but when a place (e. g., a store) is selected, param2 is the Google Maps customer id (CID) in hexadecimal encoding. In my given example, that is not the case. But, using another real-world example, the parameter:

!1s0x6ad63fbf56e24c27:0xe665b3308d32f379

can be understood like this

0xe665b3308d32f379  ---hex-to-dec--->  16601872622479930233

and https://google.com/maps?cid=16601872622479930233 will lead to the marked place.

How to extract the coordinates from that? If you only have a few samples, you can do it by hand. Click on the link above, and after 1-2 seconds, Google Maps will refresh the URL in the browser. It now contains the exact coordinates of the place (yes, this time the exact coordinates, not center of the viewport) in the !3d and !4d parameter.

If you have many samples and/or want to automatize the process, you have to use the Google Maps API (check for example this link).

What is missing: How to understand the parameter, if not a place, but an address was selected? For an example, see the link in my original question.