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The purpose of Data.gov is to increase public access to high value, machine readable datasets generated by the Executive Branch of the Federal Government. As a priority Open Government Initiative for President Obama's administration, Data.gov increases the ability of the public to easily find, download, and use datasets that are generated and held by the Federal Government. Data.gov provides descriptions of the Federal datasets (metadata), information about how to access the datasets, and tools that leverage government datasets. The data catalogs will continue to grow as datasets are added. Federal, Executive Branch data are included in the first version of Data.gov.

Transit access is measured through General Transit Feed Specification (GTFS) data collected and created by CNT. In addition to the publicly available GTFS data provided by transit agencies, CNT developed GTFS structured datasets utilizing online transit maps and schedules. In many cases, CNT has directly contacted transit agencies to obtain more specific information on stop locations and schedules. All GTFS data is merged into a proprietary dataset known as AllTransit. A companion online tool facilitates the collection, normalization, and aggregation of GTFS data to analyze fixed-route transit service.

Richard Saul Wurman, Radical Media, and Esri bring you the Urban Observatory-a live museum with a data pulse. You'll have access to rich datasets for cities around the world that let you simultaneously view answers to the most important questions impacting today's global cities-and you. Compare and contrast visualized information for a greater understanding of life in the 21st century.

EJSCREEN is an environmental justice mapping and screening tool that provides EPA with a nationally consistent dataset and approach for combining environmental and demographic indicators. EJSCREEN users choose a geographic area; the tool then provides demographic and environmental information for that area. All of the EJSCREEN indicators are publicly-available data. EJSCREEN simply provides a way to display this information and includes a method for combining environmental and demographic indicators into EJ indexes.