- Dataset Discovery
- Citing Our Data
- User Resources
- User Services
The U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center and the National Aeronautics and Space Administration (NASA) Earth Science Data System Program worked together to establish, develop, and operate the Land Processes (LP) Distributed Active Archive Center (DAAC) to provide stewardship for NASA’s land processes science data. These data are critical science assets that serve the land processes science community with potential value beyond any immediate research use, and therefore need to be accounted for and properly managed throughout their lifecycle. A fundamental LP DAAC objective is to enable permanent preservation of these data and information products. The LP DAAC accomplishes this by bridging data producers and permanent archival resources while providing intermediate archive services for data and information products.
This Product Lifecycle Plan (PLP) provides a vision of roles, responsibilities, and activities led by LP DAAC Data Scientists in each phase of the lifecycle to transition data and information products from their inception to their final preservation state.
Product preservation for Earth science data and information is executed within a three-phased lifecycle:
In this lifecycle model, NASA sponsors both the Inception and Active Archive phases while cooperating with USGS to provide the Long-Term Archive phase.
The NASA Earth Science Data and Information System (ESDIS) Project, a part of NASA’s ESDS Program, sponsors several Distributed Active Archive Centers (DAACs), each of which is aligned with specific Earth science disciplines providing interim preservation. Data and information related to the Land Processes (LP) Earth science discipline are assigned to the LP DAAC which is operated by the USGS. The USGS has a mandate from the Department of Interior (Land Remote Sensing Policy Act of 1992; Public Law 102-555, 15 U.S. Congress 5601) to establish a public domain archive of satellite data of the Earth’s land surface. EROS and the LP DAAC synergistically share the objective to provide information and services to the land processes Earth science user community including data and information product preservation.
The scope requires that the LP DAAC facilitate operational relations between data and information product Producers, NASA ESDS, and EROS. At the highest level, the LP DAAC must gain authorization from NASA to establish interfaces with new Producers to permit the consumption of resources provided to the DAAC by NASA. Likewise, the LP DAAC must gain concurrence from EROS to establish new interfaces to consume resources.
To the extent possible and reasonable, the LP DAAC assumes a leadership role in planning data and information product migrations in a manner providing minimum cost and disruption to all operations servicing the lifecycle. To achieve this goal, the LP DAAC engages with the Producers as early as possible to both identify that which should migrate and advocate for the early adoption of standards compatible with the archival systems. Because the LP DAAC and other EROS systems are designed with compatible import/export capabilities, the bulk of the technical work for this activity is to establish interfaces with the Producer. In addition, substantial management level work is required to obtain the NASA and USGS agreements necessary to permit new products to migrate to archival systems. The work required to obtain these agreements anticipates the archival appraisal process and lays the groundwork necessary to assure that scientific need and benefit is well documented and accepted by the LP community.
NASA and USGS both contribute to the development and rely on the application of data standards of consequence for data formats, data transport, metadata standards, and content standards for archive and preservation. Organizations that define standards used throughout the product lifecycle include the U.S. Federal Geographic Data Committee (FGDC), International Organization for Standardization (ISO), and the Open Geospatial Consortium (OGC). LP DAAC Data Scientists serve product lifecycle stakeholders by advocating adoption and use of agreed-upon standards and protocols for maximum benefit to the LP science community. Standards promote interoperability with existing products, ultimately fostering cost-effective approaches for research into new products as well as reuse of post-production systems for discovery, access, and preservation.