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Interpreting census block ids – Pitney Bowes MapMarker USA User Manual

Page 59

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Chapter 3:

Understanding the Geocoding Process

MapMarker USA 25

59

User Guide

See the following topics:

Supported File Formats
Geocoding Flexibility and Trade-offs
General Guidelines for Optimizing Geocoding
Specify Input Address Columns
Specify Output Address Columns
Interpreting Census Block IDs
Output Field Size and Column Names
Mixed Case Street Output
Setting Startup Preferences

Interpreting Census Block IDs

MapMarker can return Census Block IDs as output, or partial Census information, depending on the
quality of the match.

The complete Census Block ID is a 15-character code and is made up of the following:

SSCCCTTTTTTGBB(B)
where S=State FIPS (Federal Information Processing Standard) code (two characters)
C=County FIPS code (three characters)
T=Census Tract (six characters)
G=Census Block Group (one character)
B=Census Block (typically two characters, sometimes three)

MapMarker can return the full 15-character Census Block ID for geocoded records with S2, S3, S5,
S7, or S8 geocoding result codes The S4 result code can return a 15-character Census Block ID if
the block groups on each side of the street are the same.

L

Result codes are very important in evaluating the accuracy of your geocoded results. For a
more complete discussion of this topic, see

Result Codes

.

Some S codes and Z codes may return partial census information if ZIP + 4

®

information is supplied.

Others may not return any census information because certain information is missing.