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Content transfer: Getting data moved around the network

Content transfer: Getting data moved around the network. The NC Geospatial Data Archiving Project experience. Steve Morris NCSU Libraries. DLF Fall Forum November 12, 2008. NCGDAP Content transfer: Overview.

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Content transfer: Getting data moved around the network

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  1. Content transfer:Getting data moved around the network The NC Geospatial Data Archiving Project experience Steve Morris NCSU Libraries DLF Fall Forum November 12, 2008

  2. NCGDAP Content transfer: Overview • Content type: State and Local geospatial data from the NC Geospatial Data Archiving Project • Three content transfers: • External drive transfer to LC (2 TB) • Network transfer to LC (remaining 3.2 TB) • Network transfer to San Diego Supercomputer Center (5.2 TB) as part of Chronopolis project • Technical issues • Errors in initial drive manifests • Checksumming times for large TIFFs • Illegal characters in uncurated data

  3. Importance of data transfer in project • Very large data collections originating from small local agencies • 100’s of GB for a single county orthophoto flight year • Limited network capacity at agency level -- need for simple network transfer solutions that can be implemented at local or state agency level • Reality of external drive transfer • e.g. “orthophoto sneakernet” among agencies • Need better data integrity management in disk transfers • New local-state-federal collaborations on data sharing infrastructure • Project focus: capture data “in motion”

  4. Content transfer as aid to preservation • Preparation of data for transfer spurs introspection and can catalyze improvements • Documentation and metadata • Clarification of rights • Extraction and encapsulation of data • Requires and helps cultivate a common understanding of data • Data naming • Content packaging (e.g., .zip file practices) • How and when the data can be used

  5. Content transfer in GeoMAPP • Geospatial Multi-state Archival and Preservation Partnership (2007-2009 NDIIPP project) • State Archives and state geospatial organizations of North Carolina, Kentucky, and Utah • Intrastate data transfer scenarios • G G: Local-to-state, between state agencies • G A: State/local geo agency-to-Archives • A G: Retrieval of historical data from Archives • Inter-state data transfer scenarios • G G: Reciprocal continuity of operations support (?) • A A: Distributed preservation networks

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