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Table 2 Numerical Differences between ZCTA and ZIP Code Geographic Base Files in New York State

From: On the use of ZIP codes and ZIP code tabulation areas (ZCTAs) for the spatial analysis of epidemiological data

 

ZCTA (2000)

ZIP Code (GDT 2000)

Number of Polygons

2,450

1,599

Number of Unique Records

1,676

1,599

Average Size

51.90 km2

70.26 km2

Minimum Size

0.003 km2

0.006 km2

Maximum Size

1,054 km2

1,217 km2

Standard Deviation in Size

80.34 km2

102.71 km2

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International Journal of Health Geographics

ISSN: 1476-072X