2. NSDI Framework Data๏ƒ

2.1. Introduction๏ƒ

The SDI Framework Data Standards establishes common requirements for data exchange for data. Geographic data themes have been established that are of critical importance to the National Spatial Data Infrastructure (NSDI), as they are fundamental to many different Geographic Information Systems (GIS) applications. The NSDI specifies a minimal level of data content that data producers, consumers, and vendors are expected to use for the interchange of data for these themes, including through Web services.

The data standards include a base document and parts that correspond to following data themes: cadastre, imagery, elevation, geodetic control, government units and administrative and statistical boundaries, water - inland, and transportation. The transportation part consists of a base sub-part and sub-parts that correspond to different modes of transportation: airport facilities; rail; roads; transit; and waterways.

The draft standards were initially developed through the Geospatial One-Stop e-Government initiative; however, the FGDC assumed leadership for continued standards activities.

As the Geographic Information Framework Data Content Standard was developed using public funds, the U.S. Government is free to publish and distribute its contents to the public, as provided through the Freedom of Information Act (FOIA), Part 5 United States Code, Section 552, as amended by Public Law No. 104-231, โ€œElectronic Freedom of Information Act Amendments of 1996โ€.

2.2. Table Data themes๏ƒ

Note

This resources is underdevelopment.

Part Maintenance Authority NGDA Theme(s)

Part 0, Base document, FGDC-STD-014.0-2008 (direct link to document) USGS - Part 1, Cadastral, FGDC-STD-014.1-2008 (direct link to document) BLM Cadastre Part 2, Digital Orthoimagery, FGDC-STD-014.2-2015(link to web page) USGS Imagery Part 3, Elevation, FGDC-STD-014.3-2008 (direct link to document)

USGS Elevation Part 4, Geodetic Control, FGDC-STD-014.4-2008 (link to web page) NGS Geodetic Control Part 5, Governmental Unit and Other Geographic Area boundaries, FGDC-STD-014.5-2008 (link to web page)

Census Governmental Units, and Administrative and Statistical Boundaries Part 6, Hydrography, FGDC-STD-014.6-2008 (direct link to document) USGS Water - inland Part 7, Transportation Base, FGDC-STD-014.7-2008 (direct link to document) DOT Transportation Part 7a, Transportation - Air NOT endorsed DOT Transportation Part 7b, Transportation - Rail, FGDC-STD-014.7b-2008 (direct link to document)

DOT Transportation Part 7c, Transportation - Road, FGDC-STD-014.7c-2008 (direct link to document)

DOT Transportation Part 7d, Transportation - Transit, FGDC-STD-014.7d-2008 (direct link to document) DOT Transportation

Part 7e, Transportation - Inland Waterways, FGDC-STD-014.7e-2008 (direct link to document) USACE Transportation

2.3. SDI Data Schemas๏ƒ

Note

This resources is underdevelopment.

Each part includes an integrated application schema expressed in Unified Modeling Language (UML) developed through the Object Management Group (OMG). The application schema specifies, as appropriate, the feature types, attribute types, attribute domain, feature relationships, spatial representation, data organization, and metadata that define the information content of a data set. XML Metadata Interchange (XMI) format files (XMI is another specification developed by OMG) are used to exchange of UML models between various among software packages.

While the Geographic Information Framework Data Standard does not specify a single structure for the interchange of data, an implementation using Geography Markup Language (GML) Version 3.1 developed through theOpen Geospatial Consortium, Inc. (OGC) has been created.

GML/XML for the parts of the Geographic Information Framework Data Standard may found at www.fgdc.gov/schemas/framework/.