Q:

Is it programmatically possible for Google to track the referrer URL of a Google Maps URL on a mobile browser that opens up a native app?

If you click on a Google Maps URL link (comgooglemaps://) on a website in Safari or Chrome on an Android or iOS device that opens up the native Google Maps App, is it possible for Google track the referring website that you clicked the link on?
For example: If you clicked on comgooglemaps://?q=Pizza&center=37.759748,-122.427135 from stackoverflow.com in Chrome or Safari on iOS or Android, this takes you to the Google Maps native app. Can Google track the referring site (stackoverflow.com)? 

A:

It's impossible track the referring website so far.
Google Maps Application just only receive info in  the "comgooglemaps://" schemed url. The Google Maps URL scheme allows you to launch the Google Maps Application, and perform one of the following actions:searches, direction requests, and display map views with valid parameters in google document: Google Maps URL Scheme
Unfortunately, there isn't an available parameter relate to referring website.
UPDATE: Discuss with:the related answer in webmasters.stackexchange

As the related answer said, if you click a URL (comgooglemaps://) in a web page made by google, maybe, google will track the referrer url(such as with Google Analytics). If the assume is true, google track the referrer url in Browser, not in Maps App.
On the other hand, if you click a URL (comgooglemaps://) in a web page made by yourself, and you don't implement any Google Analytics function. In this way, it's impossible track the referring url by google.
If the launch action is between two apps, unless the departure implement Google Analytics function, nobody can track the referring url.

