Remarks
Standards and specifications (https://www.usgs.gov/ngp-standards-and-specifications/standards-and-specifications) are essential to facilitate the development and sharing of geospatial data and products. The USGS standards and specifications define the requirements to ensure that all products and data prepared by the USGS under the National Geospatial Program are consistent in accuracy, structure, format, style, and content. Geospatial data and products are available via the USGS Store, The National Map, The National Map Small-Scale Collection, and the Geo.Data.Gov websites.
The National Map Corps volunteers are successfully editing structures in all 50 States, Puerto Rico, and the US Virgin Islands. Structures include schools, hospitals, post offices, police stations and other important public buildings. Volunteers collect and/or improve structures data by adding new features, removing obsolete points, and correcting existing data using a web-based mapping tool. Both newly collected and modified point features become part of the USGS National Structures Database, The National Map, and ultimately U.S. Topo Maps.
APIs: https://www.usgs.gov/products/web-tools/apis