Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Smart Location Database

Metadata Updated: August 30, 2023

A large body of research has demonstrated that land use and urban form can have a significant effect on transportation outcomes. People who live and/or work in compact neighborhoods with a walkable street grid and easy access to public transit, jobs, stores, and services are more likely to have several transportation options to meet their everyday needs. As a result, they can choose to drive less, which reduces their emissions of greenhouse gases and other pollutants compared to people who live and work in places that are not location efficient. Walking, biking, and taking public transit can also save people money and improve their health by encouraging physical activity.

The Smart Location Database summarizes several demographic, employment, and built environment variables for every census block group (CBG) in the United States. The database includes indicators of the commonly cited “D” variables shown in the transportation research literature to be related to travel behavior. The Ds include residential and employment density, land use diversity, design of the built environment, access to destinations, and distance to transit. SLD variables can be used as inputs to travel demand models, baseline data for scenario planning studies, and combined into composite indicators characterizing the relative location efficiency of CBG within U.S. metropolitan regions.

This update features the most recent geographic boundaries (2019 Census Block Groups) and new and expanded sources of data used to calculate variables. Entirely new variables have been added and the methods used to calculate some of the SLD variables have changed.

More information on the National Walkability index: More information on the Smart Location Calculator:

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Date June 22, 2021
Metadata Created Date August 30, 2023
Metadata Updated Date August 30, 2023
Reference Date(s) July 9, 2013 (publication)
Frequency Of Update irregular

Additional Metadata

Resource Type Dataset
Metadata Date June 22, 2021
Metadata Created Date August 30, 2023
Metadata Updated Date August 30, 2023
Reference Date(s) July 9, 2013 (publication)
Responsible Party U.S. Environmental Protection Agency, Office of Policy, Office of Sustainable Communities (Publisher)
Contact Email
Guid 33514B4C-54F2-464A-BCC7-35F441B7E21A
Access Constraints
Bbox East Long -12.68151645
Bbox North Lat 61.7110157
Bbox South Lat 6.65223303
Bbox West Long -138.21454852
Coupled Resource
Frequency Of Update irregular
Harvest Object Id 9d3474b1-0a3a-4470-aa8a-18cfa12825f4
Harvest Source Id 9b3cd81e-5515-4bb7-ad3c-5ae44de9b4bd
Harvest Source Title Environmental Dataset Gateway ISO Geospatial Metadata
Licence These data are available for public access and use and carry no restrictions. See the Smart Location Database Technical Documentation and User Guide (2021) for data sources (, limitations, and methodologies used to calculate the variables in the Smart Location Database. Although the majority of SLD variables are consistent in the data source and calculation method to previous versions, it may not be appropriate to compare all variables with version 2.0 directly. Changes in data sources and methods are explained in detail in this guide. See the National Walkability Index User Guide and Methodology and or email for more information on the data and methodology of the Smart Location Calculator.
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-138.21454852, 6.65223303], [-12.68151645, 6.65223303], [-12.68151645, 61.7110157], [-138.21454852, 61.7110157], [-138.21454852, 6.65223303]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2010
Temporal Extent End 2010

Didn't find what you're looking for? Suggest a dataset here.