Does anyone know if any of the big real estate sites do this as a feature? It seems like zillow used to have this feature but they switched to a different map p

Does anyone know if any of the big real estate sites do this as a feature? It seems like zillow used to have this feature but they switched to a different map provider and could no longer offer it. I recently read a book about making money in real estate and the author suggested that you produce a heat map like this (by hand) for the area that you are interested in investing in. I can't understand why this sort of thing isn't more commonplace. I would like to be able to create animated maps that show the prices over time. Or add in height to show the crime rate over time etc. It seems like real estate is one of those industries with a strong lobby that has been able to resist having its information become a commodity. When I bought my condo I thought the MLS was such a joke.