The U.S. Federal Geographic Data Committee (FGDC) has coordinated the development of the U.S. National Spatial Data Infrastructure (SDI) since 1994. Within the SDI, data are divided into two groups:

  • Framework data: critical to a wide range of users
  • Special-use thematic data: specialized data, mainly relevant to certain fields.

Most states in the United States implement a State Spatial Data Infrastructure to supply the National Spatial Data Infrastructure with local, regional and state datasets.

As of February 2022, the US National Geospatial Data Asset (NGDA) Portfolio is organized into 18 data themes, with themes Cadastre, Elevation, Geodetic Control, Government Units, Imagery, Transportation, Water-Inland and Water-Oceans & Coasts identified as framework themes.