{"id":20135,"date":"2021-02-16T12:34:57","date_gmt":"2021-02-16T17:34:57","guid":{"rendered":"https:\/\/reactivemusic.net\/?p=20135"},"modified":"2021-02-16T12:34:57","modified_gmt":"2021-02-16T17:34:57","slug":"mbta-api-in-max","status":"publish","type":"post","link":"https:\/\/reactivemusic.net\/?p=20135","title":{"rendered":"MBTA API in Max"},"content":{"rendered":"

Sonification of Mass Ave buses, from Nubian to Harvard.<\/p>\n

\"\"<\/p>\n

Updated for Max8 and Catalina<\/p>\n

This patch requests data from MBTA API to get the current location of buses – using the Max js object. Latitude and Longitude data is mapped to oscillator pitch. Data is polled every 10 seconds, but it seems like the results might be more interesting to poll at a slower rate, because the updates don’t seem that frequent. And buses tend to stop a lot.<\/p>\n

Original project link from 2014:\u00a0https:\/\/reactivemusic.net\/?p=17524<\/a><\/p>\n

MBTA developer website: https:\/\/www.mbta.com\/developers<\/a><\/p>\n

This project uses version 3 of the API. There are quality issues with the realtime data. For example, there are bus stops not associated with the route. The direction_id and stop_sequence data from the buses is often wrong. Also, buses that are not in service are not removed from the vehicle list or indicated as such.<\/p>\n

The patch uses a [multislider] object to graph the position of the buses along the route – but due to the data problems described above, the positions don’t always reflect the current latitude\/longitude coordinates or the bus stop name.<\/p>\n

download<\/h5>\n

https:\/\/github.com\/tkzic\/internet-sensors<\/a><\/p>\n

folder: mbta<\/p>\n

patches:<\/p>\n