nhgis national historical geographic information system

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NHGIS National Historical Geographic Information System

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Page 1: NHGIS National Historical Geographic Information System

NHGIS

National Historical Geographic Information System

Page 2: NHGIS National Historical Geographic Information System

Illustration of our Editing Process

1. Scan Paper Maps

Page 3: NHGIS National Historical Geographic Information System

Editing Process2. Heads up editing

Page 4: NHGIS National Historical Geographic Information System

Editing Process3. Overlay

Page 5: NHGIS National Historical Geographic Information System

Editing Process4. Using TIGER lines to make changes

Page 6: NHGIS National Historical Geographic Information System

Editing Process5. Completed edits

Page 7: NHGIS National Historical Geographic Information System

Data Comparison

• Minneapolis, MN vs. New Orleans, LA

• Legend standardized between cities

• Percent of total population that considers themselves ‘Black’

Page 8: NHGIS National Historical Geographic Information System

Percentage Black, 1940

Page 9: NHGIS National Historical Geographic Information System

Percentage Black, 1960

Page 10: NHGIS National Historical Geographic Information System

Percentage Black, 1980

Page 11: NHGIS National Historical Geographic Information System

Percentage Black, 1990

Page 12: NHGIS National Historical Geographic Information System

Percentage Black, 2000