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Creating Spaces for Historical Data

Creating Spaces for Historical Data. Michael Ratcliffe Geographic Standards and Criteria Branch Geography Division US Census Bureau. Research Problem.

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Creating Spaces for Historical Data

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  1. Creating Spaces for Historical Data Michael Ratcliffe Geographic Standards and Criteria Branch Geography Division US Census Bureau

  2. Research Problem • Baltimore Ecosystem Study researchers needed historical demographic data for areas in which they were collecting data about the physical environment over a 200 year period.

  3. Challenges for researchers • Obtaining historical demographic data at suitable geographic scales, particularly for small geographic areas; • Developing a framework of small geographic areas for analysis of population distribution and demographic change over time; • Relating historical demographic data to environmental and other information.

  4. 19th Century Census Geography • Counties • Minor civil divisions • Incorporated places • Wards • Enumeration districts • Sanitary districts

  5. Sources of Historical Geographic Area and Demographic Information • Decennial Census Manuscript Forms • Header on each form has space to list state, county, county subdivision, and post office • City and County Atlases • G.M. Hopkins, 1870s • Hexamer and Locher, 1860s and 1870s • Fire Insurance Maps • Sanborn and Company • Hexamer, Ernest, and Son

  6. G.M. Hopkins, Baltimore County Atlas, 1876

  7. Source: S. Hinman, 2002

  8. Methodological Approaches • Digitize geographic entity boundaries from historical maps • Build a spatial framework using current census geographic areas

  9. Reisterstown Census Tracts 4044.01 4045.01 4045.02

  10. Census Tracts and 1870s Reisterstown Tract 4045.01 Tract 4045.02 Tract 4044.01

  11. Population by Sex and Race Upper Gwynn’s Falls Watershed, 1870

  12. Age and SexUpper Gwynn’s Falls: 1870

  13. Value of Personal and Real PropertyUpper Gwynn’s Falls, 1870

  14. (source: S. Hinman, 2002)

  15. (source: S. Hinman, 2002)

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