Zoom in and out of a tilemap?

a couple samples here: Minimap extension beta

This lets your render the whole tilemap at 1/2, 1/4, 1/8, 1/16, or 1/32 scale as an image

You can also render sprites onto that shrunken version at independent 1/2, 1/4, 1/8, 1/16, or 1/32 scale