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This service area is created using Esri\u2019s Street Map Premium network dataset, which allows us to account for physical barriers such as highways, train tracks, or rivers without bridges.Using these 10-minute walk service areas, we generate overall access statistics for each urban area included in the database (e.g. number of people within a 10-minute walk of a park). This statistic is further disaggregated for three demographic variables \u2013 race/ethnicity, age, and income. In communities with an exceptionally small number of block groups, 10-minute walk demographic calculations are not available. All calculated population statistics are based on US Census Block Group estimates provided by Esri. 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