MIL-D-89009
3.4.8
Geographic Information System (GIS)
analysis. The
DCW database supports GIS analysis;
however, in
order to perform GIS functions, the
DCW database
must be used with user-supplied GIS
software.
TABLE 1.
Thematic layers and other coverages for DCW
detailed libraries and BROWSE library.
DCW library
Coverage
BROWSE library
Coverage
thematic layers
name
thematic layers
name
Aeronautical
AE
ONC Compilation Date
CO
Cultural Landmarks
CL
Data Volume
DV
Data Quality
DQ
Drainage
DN
Drainage
DN
Geographic Regions
GR
Drainage-Supplemental
DS
Hypsographic Data
DA
Hypsography
HY
Availability
Hypsography-Supplemental
HS
ONC Index
IN
Land Cover
LC
Political/Oceans
PO
Ocean Features
OF
Populated Places
PP
Physiography
PH
Political/Oceans
PO
Populated Places
PP
Railroads
RR
Roads
RD
Transportation Structure
TS
Utilities
UT
1
Vegetation
VG
Other DCW library
Coverage
Other BROWSE library
Coverage
coverages
name
coverages
name
Gazetteer
GAZETTE
None
Tile Reference
TILEREF
Library Reference
LIBREF
1 Vegetation data are available only on Disc 1 and only for a portion of
the North American continent.
3.4.9 File structure. The DCW database utilizes the
standard Disk Operating System (DOS) directory structure.
3.4.10 Database size. The entire DCW database contains
approximately 1,700 megabytes (MB) of data.
3.5
Database structure.
3.5.1 Data structure. The DCW database shall be implemented
in VPF in accordance with MIL-STD-600006.
3.5.2 VPF implementation. The DCW database is implemented
in the VPF data structure as described in paragraphs 3.6 through
3.8. These sections describe, respectively, the directory levels
implemented in the DCW (3.6), the VPF file types implemented in
7
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