How do I make annotations zoom with map view?

[Kukulcan]

I want them to have the same "real" size all the time, not the same pixel size.

[Duncan C]

Originally Posted by Kukulcan

I want them to have the same "real" size all the time, not the same pixel size.

You don't. Annotations are designed to keep the same pixel size. It sounds like what you want is overlays and overlay views, a feature new to iOS 4.0 (and thus not yet available to the iPad.)

You might be able to flog annotation views into doing what you want by writing a custom annotation view that overrides it's drawRect method and scales the overlay view based on map scale, but it would be painful.