The second day of #LBS2025 conference is about to start, and so is the onslaught of presentations from @digigeolab members and alumni on topics like #mobility #BigData #GIScience #MachineLearning #NatureRecreation #Segregation #EcosystemServices #Geography
I have the dubious honor of the very last presentation of the day, acting as the firewall between the scientific program and the conference dinner. Let's see how many turn up 😅
Following that is @tadusko presenting his work on the rise and fall of Flickr and use of its data in #GIScience at the #LBS2025 conference.
Key takeaway is that #Flickr is highly biased data produced in the Global North by a select few highly active users, but widely used in research because it is the only major social media platform that still allows data collection using its API. The question remains whether the data should be used.
Brilliant work all in all!
Our visiting researcher Davi Gressler presents his work on assessing realized 15-minute trips in US cities and comparing that to trips that were longer but could have been made in 15 minutes using SafeGraph data.
@EgorKotov Yeah the idea behind the presentation and work was really interesting, and the data also seems very cool. Too bad the data is US only.
Did your Spanish data have any information on where people made frequent stops? The SafeGraph data is based on POIs and have information on how many people visit it and from which census block, and I was wondering whether something similar would be available from this side of the Atlantic 🤔
@waeiski Spanish data does not have that. But for Europe there is this · https://arxiv.org/pdf/2407.00404 Yuan Liao, Jorge Gil, Sonia Yeh, Rafael H. M. Pereira, Laura Alessandretti. “The Effect of Limited Mobility on the Experienced Segregation of Foreign-born Minorities." arXiv preprint arXiv:2407.00404 (2025) + https://github.com/MobiSegInsights/mobi-seg-se
· https://arxiv.org/pdf/2410.22386 Tozluoğlu, Çağlar, Yuan Liao, and Frances Sprei. "Mobile Phone Application Data for Activity Plan Generation."
@waeiski and this · The effects of 9 EUR ticket: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5179427 + https://github.com/MobiSegInsights/nine-euro-ticket-de
· Work in progress: https://github.com/MobiSegInsights/mobi-social-segregation-se
Tuomas Väisänen 📼🧟♂️
Egor Kotov 🌐🏃♂️🚊🚋🚙