how do I draw an overlay on mouse over for a zip code boundary

Question

I'm drawing zip code boundaries using geojson on a google maps. I'd also like this to be intractable. If someone hovers the mouse over a zip code, it should bring up a "cursor" that reads "We serve zip code: xxxxx". Any ideas?

Robert Hannah · Answer

any tip on efficiently calculating the center of each zip polygon?  google API requires providing latlong for a marker/label/overlay and that means (common case) calculating the center of each polygon in order to place that marker.
Any advice?

Boundaries-io · Answer

This can be done easily with our API and GoogleMaps for example:
https://developers.google.com/maps/documentation/javascript/datalayer

Thanks!

boundaries-io

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how do I draw an overlay on mouse over for a zip code boundary