In
data analysis involving geographical locations, geo-imputation or geographical imputation methods are steps taken to replace
missing values for exact locations with approximate locations derived from associated data. They assign a reasonable location or geographic based attribute (e.g.,
census tract) to a person by using both the demographic characteristics of the person
and the population characteristics from a larger geographic aggregate area in which the person was geocoded (e.g., postal delivery area or county). For example, if a person's census tract was known and no other address information was available then geo-imputation methods could be used to probabilistically assign that person to a smaller geographic area, such as a census block group.
See also
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Geocoding
Address geocoding, or simply geocoding, is the process of taking a text-based description of a location, such as an address or the name of a place, and returning geographic coordinates, frequently latitude/longitude pair, to identify a locatio ...
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Imputation (statistics)
In statistics, imputation is the process of replacing missing data with substituted values. When substituting for a data point, it is known as "unit imputation"; when substituting for a component of a data point, it is known as "item imputation". ...
Notes and references
* Jones, S. G.; Ashby, A. J.; Momin, S. R.; Naidoo, A. (2010) "Spatial Implications Associated with Using Euclidean Distance Measurements and Geographic Centroid Imputation in Health Care Research", ''Health Services Research'', 45 (1), 316–327 {{doi, 10.1111/j.1475-6773.2009.01044.x
Geocodes
Geographic information systems
Missing data