Lessons Learned in Generating Crosswalks for Earth Science Metadata

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Information about Lessons Learned in Generating Crosswalks for Earth Science Metadata
Technology

Published on February 19, 2014

Author: HDFEOS

Source: slideshare.net

Description

The HDF-EOS Support Group has developed crosswalks (mappings) for Earth Science Metadata and standards. In doing so, several themes emerged that are applicable to any type of metadata. Some themes are specific within a set of metadata and others are associated with the mapping of one set to another or to a standard. This presentation will discuss these themes and possible methods to address them.

Lessons Learned in Generating Crosswalks for Earth Science Metadata http://hdfeos.gsfc.nasa.gov/datamapping/index.cfm Lori J. Tyahla & Weijun Su Global Science & Technology, Inc. Richard Ullman NASA, Goddard Space Flight Center HDF/HDF-EOS Workshop VIII Aurora, CO, 10/27/2004

Overview The Goal: Interoperability among data systems The Challenge: Automated translation of metadata The Method: Develop and maintain crosswalks for translation The Lessons: • Definitions need to be complete, unambiguous, further clarified using examples, and written for a wider audience. • Automated mapping of a generalized attribute in one system or standard to more specific attributes in another is not straightforward. • Ongoing, diligent human input is required. HDF/HDF-EOS Workshop VIII Aurora, CO, 10/27/2004

Systems and Standards The Systems: • Earth Observing System Data and Information System (EOSDIS) Core System (ECS) • Earth Observing System (EOS) Clearing House (ECHO) • Global Change Master Directory (GCMD) The Standards: • Content Standard for Digital Geospatial Metadata, Federal Geographic Data Committee (FGDC-STD-001-1998) • Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Data, Federal Geographic Data Committee (FGDC-STD-012-2002) HDF/HDF-EOS Workshop VIII Aurora, CO, 10/27/2004

Steps Toward Reaching Goal • Write documentation with a wider audience in mind. Provide clear, complete definitions supported by examples for all classes and attributes. • Use valids to help constrain the problem of mapping generalized attributes on one system to specific ones in another system. • Designate one person only to develop the crosswalk if possible to reduce mapping inconsistency due to the subjectivity of the human element. HDF/HDF-EOS Workshop VIII Aurora, CO, 10/27/2004

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