This is a really neat library.

E.g. IE throws this error for huge images:

SCRIPT16389: Unspecified error.

I'm sure the reason is maximum size restrictions of <canvas />:

• https://developer.mozilla.org/en-US/docs/Web/HTML/Element/canvas#Maximum_canvas_size
• https://stackoverflow.com/questions/6081483/maximum-size-of-a-canvas-element

A try/catch around drawImage should handle thrown exceptions, like at this line:

Free high res images can be found here:
https://effigis.com/en/solutions/satellite-images/satellite-image-samples/