@workerbee22

I know it's not solution, but I discovered another map package which supports ground overlays and many other things:
flutter_map
I didn't need google specific functionality for map, so I replaced them.

Maybe it will help someone....

Hi there!

I needed GroundOverlay in my project and implemented support for Android.
You are welcome to continue working on my forked repo to add iOS support

https://github.com/bytestreme/plugins/

If you want to use GroundOverlay for Flutter Android now,
you can use the following dependency from the repository instead of the one from pub repo

upd:

google_maps_flutter:
    git:
      url: https://github.com/bytestreme/plugins.git
      path: packages/google_maps_flutter/google_maps_flutter/

Here is the example

@UDAYBIDKAR did some great work on this in flutter/plugins#4410, but unfortunately isn't available to finish the work. If anyone would like to build on their great contribution and take it to the finish line, that would be great — there's just some review comments to address (see the PR for details).

I have followed this feature request since the first issues and later PRs. After waiting for a while, I started using this fork from originally rejected PR flutter/plugins#3420, It has been a while since I have been using it in production without any major issues. However, it would be great to have it on the official channel.

This is how you can give it a try installing in your pubspec.yaml:

  google_maps_flutter:
    git:
      url: https://github.com/joaquinperaza/plugins.git
      path: packages/google_maps_flutter/google_maps_flutter/

I used it for showing geotiffs of irregular shapes with RGB data or single-band with transparency computed locally on the flutter side. Here are some examples. Unfortunately I can’t share the class geotiff handling the png encoding since I am not the owner; however, I can help you reach the owners. It is currently deployed in iOS and Android products.

Any updates on this? Such functionality would be of major use for a great number of app ideas. I can understand that there is currently no bijection between the functionalities of the native ground overlays for Android and iOS, for example the fact that the iOS implementation has no constructor allowing the specification of a target location and a width. However, this is not something that basic math can't get around.

Some existing forks of the plugins library are of good quality in Android. However, iOS is still rather flaky and unsuitable for production code when attempting more powerful functionality.

Thanks again for all the hard work.