Map boundaries: us-atlas 3.0.1, derived from the US Census Bureau 2017 cartographic boundaries.
https://github.com/topojson/us-atlas
City centers are approximate. Demonstration connections do not represent observed activity.

Copyright 2013-2019 Michael Bostock

Permission to use, copy, modify, and/or distribute this software for any purpose
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Seattle-area water outlines: USGS National Hydrography Dataset, public domain. Clipped and simplified for this illustrative view.
https://hydro.nationalmap.gov/arcgis/rest/services/nhd/MapServer
Neighborhood and city markers use approximate area centers. All local views, leads and connections are fictional demo values, not observed activity.