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|  MIL-D-89009
TABLE 13.
Format and content for BROWSE library Data Quality
Table (DQT) - Continued.
19911207000000.00000\
00000000000000.00000\
00000000000000.00000\
No formal effort was undertaken to develop a quantitative accuracy
statement.\
No formal effort was undertaken to develop a qualitative accuracy
statement.\
N/A\
N/A\
Unknown. No accuracy evaluation was undertaken.\
N/A\
UNKNOWN\
N/A\
UNKNOWN\
N/A\
UNKNOWN\
N/A\
The coverages within this library were created for reference only.
They are not intended to be used for analytical purposes.
e. BROWSE library tiling scheme. The tiling scheme
implemented for the BROWSE library is a single global
tile that covers the entire extent of the BROWSE
library. The BROWSE library does not require either a
LIBREF or TILEREF coverage.
3.8.5
Coverage-level record layout. Each coverage is the
conceptual equivalent of a thematic layer. Each coverage
directory contains one coverage with a two-character name
representative of the thematic layer name (e.g., DN for drainage).
a. Coverage-level tables. Each coverage within a coverage
directory is made up of a feature class schema table,
feature tables, value description tables, primitive
tables, and index tables. The feature class schema
table, which is required for each coverage, specifies
the feature table and primitive table relationships that
define a feature class. A coverage may include one,
two, or three feature classes and one text feature
class. Feature tables contain the attribute and
attribute values that define each feature class. Value
description tables are required to provide descriptions
of the attribute values found in a feature table. A DCW
coverage may include either an integer value description
table, a character value description table, or both. A
thematic index is also implemented for specified columns
of each feature table. Primitive tables contain the
coordinate values for the nodes, edges and faces, and
26
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