Data and credits

Hopalong is built on open data and open-source software. Thank you to everyone who makes them.

Maps and directions

Map data © OpenStreetMap contributors, available under the Open Database License (ODbL).
Map tiles from OpenFreeMap, using OpenMapTiles.
Map drawing by MapLibre GL JS.
Directions by Valhalla on the FOSSGIS public server. Terrain heights © U.S. Geological Survey and U.S. National Oceanic and Atmospheric Administration.
Search by Photon (komoot), and address lookup by the U.S. Census Bureau geocoder.
Business listings from Overture Maps Foundation places data, under the Community Data License Agreement – Permissive 2.0.

Pittsburgh police incident reports from the Western Pennsylvania Regional Data Center.
Philadelphia police incident reports from OpenDataPhilly.
Allentown police incident data from the City of Allentown's open data.
Town-level crime rates from the FBI's Crime Data Explorer.
Pittsburgh street closures from the City of Pittsburgh's Department of Mobility and Infrastructure, via the Western Pennsylvania Regional Data Center (Creative Commons Attribution).
Pittsburgh game dates and times typed in from each team's official schedule; incline hours and fares from Pittsburgh Regional Transit and the Duquesne Incline.
Crash and deer hot spots from PennDOT crash records.
Fatal-crash hot spots in other states from NHTSA's Fatality Analysis Reporting System (FARS) (public domain).
Police department crime counts for other states from the FBI's official Crime Data Explorer API via api.data.gov.
The list of Pennsylvania colleges and campuses from the U.S. Department of Education's IPEDS college data (public domain); campus grounds from OpenStreetMap.
Campus police and escort numbers from each school's own public safety website, checked against it each semester.

Reported crime reflects where police patrol and where people report, as well as where crime happens. Fewer reports does not guarantee safety.