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Table 1 Characteristics of the 3,615 addresses

From: Accuracy of commercial geocoding: assessment and implications

Characteristic

Stratum or Units

n (%) or mean (standard deviation)

Address Source

EPA

2,522 (70)

WHI

1,050 (29)

NGS

43 (1)

Address Typea

Complete

2,808 (78)

No Street Number

460 (13)

Intersection

347 (10)

Zip Code

Absent

2,359 (65)

Present

1,256 (35)

Edit

Unedited

1,533 (42)

Minor

1,392 (39)

Major

690 (19)

Densityb

persons/km2

1,066 (2,645)

Original Datumc

NAD83 or WGS84

1,615 (45)

Unknown

1,274 (35)

NAD27

726 (20)

  1. aComplete = street number, name, city and state present; No Street Number = street name, city and state present; Intersection = crossing street names, city and state present. b33rd and 67th percentiles = 221 and 920 persons/km2. cOf associated coordinates: NAD83 and NAD27 = North American Datum of 1983 and 1927; WGS84 = World Geodetic System of 1984.
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Epidemiologic Perspectives & Innovations

ISSN: 1742-5573