Search and parsing of databases of organizations or how to solve the problem of finding the best place?

Question

Database

The task is to find the optimal (all suitable with sorting) place in the city to place the point. Criteria are set, for example, in the neighborhood of an optics store, no further than 1 km from the school and no further than 10 minutes. from the metro (with the metro, the task will apparently be reduced to a request to Google Yandex).
The problems are as follows:
1. We didn’t find a ready-made suitable solution (suddenly you know)
2. There is no database of organizations, as well as a parser. It was possible to find only paid solutions. Is there something free or something to build on? Correction: we write it ourselves, I have already written parsers before, only simpler, so there is no point in giving it to someone, especially since there is time and I want to implement it on my own.
3. It would be great to provide the result in the form of a heat map, but how to do this and on the basis of what is not at all clear. Have you solved similar problems? Doable or easier to forget?
Cities - so far Moscow, St. Petersburg, Ekb, but in general the Russian Federation.

Answer 1

Look vmoskvehorosho.ru , everything is done on open data.