Best places to commute from in Warsaw: public transit heatmap

Location, location, location! That’s what the real estate agent will tell you when asked what’s the most important factor when choosing the place to live. When living in a modern, busy city like Warsaw you have two choices: traveling by car or by public transit. I came up with the idea to automate finding the best place to live in Warsaw, transport-wise. My plan is to estimate the time it takes to commute from every address in Warsaw to the city center. I’m focusing on public transport and I’d like to find both hidden gems and transport black holes. That is, places with great commute time despite the distance and the opposite - respectively.