some bibliography on isochrone maps
18 abril 2022, 13:00 • Joaquim Jorge Da Costa Paulino Pereira
https://citta.fe.up.pt/assets/pdf/projects/2020_final-report_iptc.pdf
https://www.tandfonline.com/doi/pdf/10.1080/17445647.2016.1195296
https://www.geoapify.com/how-to-make-travel-time-maps-for-public-transporthttps://traveltime.com/blog/free-isochrone-map-generator
https://urbandatapalette.com/post/2020-12-public-transit-isochrone/