Linestrings for coastlines. Long linestrings are split into smaller chunks that are easier and faster to work with.

City of Seattle, Department of Planning and Development -- Building Permits issued in the past five years or currently in progress

Details of Motor Vehicle Collisions in New York City provided by the Police Department (NYPD).

City of Seattle, Department of Planning and Development -- Building Permits issued in the past five years or currently in progress

Cb 2014 Us Zcta510 500k

The cartographic boundary files are simplified representations of selected geographic areas from the Census Bureau’s MAF/TIGER geographic database. These boundary files are specifically designed for small scale thematic mapping.

Generalized boundary files are clipped to a simplified version of the U.S. outline. As a result, some off-shore areas may be excluded from the generalized files. For more details about these files, please see our Cartographic Boundary File Description page.

From https://www.census.gov/geo/maps-data/data/gazetteer2010.html