# Licence: NYC Subway Crime Rates and Ridership, 1998–2026

This package has three licence layers: government-source values remain under their publishers' terms; SparkyData's additions are CC BY 4.0; the code is MIT. The `layer` column of `data_dictionary.csv` gives the layer of every column.

## Government records: their publishers' terms

Government records are reproduced or counted under their publishers' terms, which continue to apply; SparkyData does not relicense them. City sources (NYPD complaint records and complaint and arrest counts, the Department of Homeless Services' shelter census, both on NYC Open Data, and the Mayor's Management Report): the City of New York's terms, https://www.nyc.gov/main/terms-of-use. MTA sources on Open NY (ridership, station and fare-evasion figures): Open NY's terms, https://data.ny.gov/dataset/OPEN-NY-Terms-Of-Use/77gx-ii52. Central Park's daily weather comes from NOAA's National Centers for Environmental Information, and the population estimates from the US Census Bureau, under their terms. Yearly ridership for 1997 to 2013 is transcribed from the NYU Rudin Center's table of New York City Transit's counts. `events.csv` links to laws, press releases and news reports; none of those documents is redistributed here.

## SparkyData's additions: CC BY 4.0

SparkyData's own additions are CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/): the monthly rides before March 2020, the estimated entries, the rates, the fiscal-year rides, the station matches, the flags, `events.csv`, `QUESTIONS.md`, `missing_values.csv` and the documentation.

Full licence: https://creativecommons.org/licenses/by/4.0/legalcode

## Code: MIT

`build_dataset.py` and `analysis.py` are MIT.

Copyright (c) 2026 SparkyData

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial
portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
THE USE OR OTHER DEALINGS IN THE SOFTWARE.

## How to credit

    SparkyData (2026). NYC Subway Crime Rates and Ridership, 1998–2026 (version 2.0). SparkyData additions CC BY 4.0; government-source data under publisher terms; code MIT.
    https://sparkydata.dev/data/nyc-subway-crime-and-ridership

## A request, not a licence term

A complaint is an allegation the police recorded, not a finding about anyone. We ask that nothing here be used to identify a person or to make a decision about one.