Hi Ariel, There are many open source options to conduct routing analysis, which are used into accessibility modeling. One of the most used alternatives nowadays is called OpenTripPlanner <https://github.com/opentripplanner/OpenTripPlanner>. I've written a couple Python scripts to call OTP e generate travel-time estimates from many points to many points using different transport modes including public transport (https://github.com/rafapereirabr/otp-travel-time-matrix). Marcus Youg and others have developed a R package (opentripplanner https://github.com/ITSLeeds/opentripplanner) that allows one to call OTP from within R. Highly recommended! I hope this is helpful in some way.
best wishes, Rafael H M Pereira https://urbandemographics.blogspot.com/ On Wed, Sep 4, 2019 at 2:25 PM Rich Shepard <rshep...@appl-ecosys.com> wrote: > On Wed, 4 Sep 2019, Ariel Fuentesdi wrote: > > > I want to produce a prediction of trip generation for the next year, I'm > > thinking could be useful a Spatio-temporal model with covariates data. I > > have trips values in point locations since 2015 also the population in > > census tracts and supply which are bus lines and I'm thinking to convert > > them into an accessibility grid (from the census tracts to bus stops). I > > have seen that Spatio-temporal models are applied to environmental > > problems only, would you recommend me any specific approach or the use of > > a specific model? > > Ariel, > > Your description suggests you would like to solve the classic 'traveling > salesman' problem. I don't know that R's spatio-temporal functions are > suitable but open street map apparently can help pick optimal routes and a > web search for linux: traveling salesman problem found many software > solutions. > > Travel safely, > > Rich > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > [[alternative HTML version deleted]] _______________________________________________ R-sig-Geo mailing list R-sig-Geo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-geo