how to color regions with Apple's MapKit?

[mr.riddlemefish]

The app called "BOMRadar" shows rain intensity over a region by
coloring the area with different coloured pixels depending on amount
of rain. There seems to be no way of defining a polygon with MapKit,
and this technique would work as a substitute for me, but how do you
it? Is it a separate overlay, and if so then how to keep the views
responding to gestures correctly, which I understand is the usual
problem? Or do they not use Mapkit?

Thanks if you can help?

[Lucas Neiva]

Take a look at annotations. MKAnnotation, MKAnnotationView... I'm you can google some nice tutorials on how to use annotations on your Google Map.

You could draw your own MKAnnotationView using CG and have it have whatever shape and color you want.

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[Peter J. MASON]

Lucas: I understand. I found one such article. Thanks.