Models for creating population databases and their consequences

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Models for creating population databases and
their consequences

• Gene Fosnight
• UNEP GRID Sioux Falls

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Population Models

• Sampling models control data collection and
  compilation
• Simple redistribution models Minimum bias models
• Complex redistribution models Maximum
  information models

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Applications that need human population
information

• Analysis at the level of the sampling unit
• Application models seeking relationships between
  spatially distributed variables
• Application models seeking patterns within the
  population information or between the population
  model and exogenous variables
• Population migrations

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Issues - Opinions

• Quality of source data is of supreme importance

• City lights data can be an important contribution

• Were a long way from handling population
  migrations

• Were a long way from handling complex data
  involving rural/urban, economic, cultural or age
  distributions

• A need for longitudinal (time series) data exists

• Over-modeling real versus perceived resolution

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Concern

• Have the two most recent global population
  databases improved the state-of-the-art of
  population modeling?