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Developing Software for the Hand-Held Computer

This comprehensive overview details the development of software for hand-held computers (HHC) utilized in U.S. Census operations. It covers key tests conducted in 2004 and 2006, focusing on the automation of nonresponse follow-up (NRFU) processes, GPS integration, and data encryption. The document outlines system design goals, hardware constraints, and lessons learned, emphasizing the obstacles faced due to limited development environments and memory capacities. The exploration of innovative tools and techniques highlights the evolution of census data collection methodologies.

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Developing Software for the Hand-Held Computer

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  1. Developing Software for the Hand-Held Computer By Jean Sebold Decennial Development Team Technologies Management Office US Census Bureau

  2. Overview • Define Census Operations • Census 2004 Test • Goals • High Level System Design • Hardware / Environment • Constraints • Development Environment • Lessons Learned

  3. Overview (cont.) • Census 2006 Test • Goals • High Level System Design • Hardware / Enviroment • Constraints • Development Environment • Problems Incurred • 2004 vs. 2006

  4. Census Decennial Operations • Nonresponse Followup (NRFU) • Address Canvassing (AC)

  5. Census 2004 Test • 1000 Enumerators • 2 sites: 1 urban/1 rural • NRFU started April 2004 and ended July 2004

  6. Census 2004 Test • Goals included: • Automating the NRFU questionnaire in both English and Spanish • Developing an Assignment Management System (AMS) to manage the enumerator workload • Transmitting data to/from the device via a 56K modem

  7. Census 2004 Test • Goals included (cont.): • Allowing the user to capture GPS coordinates • Displaying TIGER map files using COTS product, ArcPad • Encrypting Census data on the Hand-H Computer (HHC)

  8. 2004 HHC Hardware / Environment • Compaq iPAQ 3950 • Pocket PC 2002 – OS • 64 MB Memory • 256 MB SD card • Modem • GPS • Fsecure – encryption software • ArcPad read-only Maps

  9. 2004 Constraints • Screensize – 2” x 3” • Lack of a physical keyboard • No industry standard instrument development tools • Available memory – 64MB • CPU speed – 400 MHZ • Development time – limited • Training – must be simple • OS – uses a ‘lite’ version of Windows

  10. 2004 Development Environment • Visual Studio .NET • C# Programming Language • SQL Server CE • XML

  11. 2004 Lessons Learned • Pocket PC 2002 OS had known problems

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