Example dataset for taxi simulatoin

This is an example dataset, containing pre-processed taxi trips from Manhattan, New York City, to be used with the simulation code available at https://github.com/dkondor/taxi_simulation Trip data originally comes from the NYC Taxi and Limousine Commission: https://www1.nyc.gov/site/tlc/about/tlc-trip-record-data.page Road network data comes from OpenStreetMap, available under the Open Data Commons Open Database License The following files are included in this dataset: 1. Road network data: NYC_nodes.csv includes a list nodes with a node ID, longitude and latitude. Node IDs range between 1 and 4091 (inclusive). NYC_segments.csv includes a list of directed edges between the above nodes, with distances along the edges given in meters. 2. Trip data: The files nytrips_{day}.bz2 (with {day} ranging from 14975 to 15339) contain trips happening in each day in 2011. These are CSV files compressed with bzip2, without header. The columns include the taxi ID (arbitrary numeric ID), trip start and end timestamp (UNIX timestamp without time zone), trip start and end node ID (corresponding to one of the nodes in the above network files). 3. Trip start distribution: trip_start_dist.dat is an example distribution of trip start locations, i.e. node IDs along with the number of trips starting there in a one week period. 4. Travel times and indexes: nyc_travel_times.zip contains a set of binary matrices containing travel times and an index for these that is used by the simulations; these were generated from the trips according to the methodology described in the following paper: Santi, P., Resta, G., Szell, M., Sobolevsky, S., Strogatz, S. H., & Ratti, C. (2014). Quantifying the benefits of vehicle pooling with shareability networks. PNAS, 111(37), 13290–13294. https://doi.org/10.1073/pnas.1403657111本示例数据集包含经预处理的美国纽约曼哈顿地区出租车行程数据，可配合https://github.com/dkondor/taxi_simulation处提供的仿真代码使用。原始行程数据源自纽约出租车与豪华轿车委员会（NYC Taxi and Limousine Commission），其官方数据页面为https://www1.nyc.gov/site/tlc/about/tlc-trip-record-data.page；道路网络数据取自开放街道地图（OpenStreetMap），发布遵循开放数据共同体开放数据库许可证（Open Data Commons Open Database License）。 本次数据集内含以下四类文件： 1. 道路网络数据：NYC_nodes.csv 收录节点列表，包含节点ID、经度与纬度信息，节点ID取值范围为1至4091（含两端）；NYC_segments.csv 收录上述节点间的有向边列表，边的通行距离以米为单位计量。 2. 行程数据：文件 nytrips_{day}.bz2（其中{day}取值范围为14975至15339）存储了2011年每日的出租车行程数据。该类文件为经bzip2压缩的CSV格式文件，无表头行。各列依次为：出租车ID（任意数值标识符）、行程起始与结束时间戳（无时区的UNIX时间戳）、行程起始与结束节点ID（对应前述道路网络文件中的节点）。 3. 行程起始分布数据：trip_start_dist.dat 为示例行程起始位置分布文件，内容包含节点ID以及该节点在一周周期内的起始行程总次数。 4. 行程时间与索引文件：nyc_travel_times.zip 包含一组二进制矩阵与仿真所用的索引文件，此类数据依据下述学术论文中的方法从行程数据生成： Santi, P., Resta, G., Szell, M., Sobolevsky, S., Strogatz, S. H., & Ratti, C. (2014). Quantifying the benefits of vehicle pooling with shareability networks. 美国国家科学院院刊（PNAS）, 111(37), 13290–13294. https://doi.org/10.1073/pnas.1403657111