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Preservation and Security

Preservation and Security. IPUMS International Wendy Thomas Data Archivist. Processing Data. Data is received ASCII format or similar on CD/DVD 9 track tape any format Conversion process and tape reading by Muller Media Signed confidentiality agreement, retain NO FILES

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Preservation and Security

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  1. Preservation and Security IPUMS International Wendy Thomas Data Archivist

  2. Processing Data • Data is received • ASCII format or similar on CD/DVD • 9 track tape any format • Conversion process and tape reading by • Muller Media • Signed confidentiality agreement, retain NO FILES • Data is converted to ASCII format

  3. Internal Processing • Data is encrypted • Only high level staff have the encryption code • Sensitive and geographically specific information is removed • Creation of a secure, non-identifiable file • Data processing • Evaluation of data elements • Creation of harmonized variables • Graduate student staff work only with non-identifiable data sets • Creation of the IPUMS sample

  4. Storage • Off line files • CD/DVD copies are held in a data safe • Preservation from fire • Preservation from access (PI’s and Data Archivest only) • Internally accessible • Encrypted files (high level staff only) • Non-identifiable source files • Externally available • Public use samples in IPUMS format • Registered users only • Respect limitations imposed by countries

  5. Documentation Coverage • Date from 1920 to 2006 • Documentation from over 400 censuses • Promotional material to official forms • Prepared over 30 country specific listings of documents in the archive • Over 20,000 documents total

  6. Document Preservation • Collection is housed in acid free archive quality storage boxes • Bibliographic records are created for all documents including a first page scan for easier identification of useful information • Full scans are made of all enumeration instructions, codebooks, and coding manuals for data in IPUMS • Full scans are made of all materials from the US Census Bureau

  7. Document Availability • Enumeration Forms • Publicly available regardless of data availability • Enumerator Instructions/Codebooks etc. • Available per country agreements for data accessibility • Related documentation • On-line versions will be available for those that we have agreements for or are public documents • All others will be listed in an on-line catalog of the Minnesota Population Center holdings

  8. Services for Countries • Provide a listing of material held with first page scan • Can provide full scans of any document held in the collection • Contact: • Wendy Thomas, MPC Data Archivist • wlt@pop.umn.edu

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