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Using a KmlLayer object within the Google Maps API, is it possible to control the opacity of a KML's image overlay features ?

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up vote 1 down vote accepted

See answer here

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Looks like it takes KML, sets a 50% opacity (static) slider could control the opacity setting

Slider control (not KML) but impressive

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This transparency / opacity control for Google Maps API v3 might be adaptable to your needs:

Disclosure: I developed the control.

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