Datasets - Data.gov Shapefile, Geo TIFF, and SDTS DEM) that a variety of mapping and image processing applications also read and write. Federal datasets are subject to the U. S. Federal Government Data Policy. Non-federal participants e.g. universities, organizations, and tribal, state, and local governments maintain their own data policies. Data policies influence the usefulness of the data.
Data.gov You can also read files that are in a variety of special formats designed to exchange specific sets or kinds of geodata (e.g., GSHHG, VMAP0, DEM, and DTED files). This link will direct you to an external website that may have different content and privacy policies from The home of the U. S. Government's open data Here you will find data, tools, and resources to conduct research, develop web and mobile applications, design data visualizations, and more.
Find Data - ICPSR You can order, and in many cases, download such data over the Internet. Restricted-Use Data. The vast majority of ICPSR data holdings are public-use files with no access restrictions. ICPSR ensures respondent confidentiality within these datasets. Sometimes the protective measures taken to reduce disclosure risk would significantly degrade the research potential of the data.
Resources to Find the Data You Need FlowingData Mapping Toolbox provides generalized sample data in the form of data files for the entire Earth and its major regions, as well as some higher resolution files covering small areas. You're usually going to find the best data straight from the source, but there are lots of applications and sites that try to make all data easier to find or easier to access. DATA SOURCES Freebase - Free data and a community effort. For some types, the data are kind of sparse, but it continues to get better. Numbrary