Working on my website that can heatmap cities based on your lifestyle preferences.

https://theretowhere.com

It currently supports complex heatmaps based on travel time (e.g. close to work + close to friends + far from police precincts), and has a browser extension to display your heatmap over popular listing sites like Zillow.

I'm thinking of making it into an API to allow websites to integrate with it directly.

Absolutely stellar! I've been looking for something like this for ages. Any chance you'll have some pre- defined options like grocery stores, libraries, airport, etc?

Living in hongkong for a few months, and absolutely love exploring the different neighborhoods. I’d love something like this or walkscore but for local guides to contribute.