Google maps custom overlay

Question

i was wondering about this project: https://developers.google.com/maps/documentation/javascript/examples/overlay-simple

i am wondering how its done, so far i only see pieces of code, it does not say anywhere how this is done, how i can achieve something like this, it does not mention any programs or any IDEs,

all it says, that its using javascript and css, but there is more information on how to do this,

anyone have any idea of how this works ? what i need ? or any tutorials on how to set up a simple overlay ?

Thanks

Answer 1

Wait @Nesquikk, are you working on Android or Web? These codes are for web apps, not for Android.

For Android, you would refer to this page on Ground Overlay for instruction on setting it up in your app.