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Table 53. Format and example of content for edge (EDG) primitive table |
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|  MIL-D-89009
paragraph 3.8.9) by means of a triplet id field type
(K), which maintains pointers to the appropriate
external tile and primitive within that tile. Refer to
MIL-STD-600006, Appendix D, for additional information
regarding cross-tile topology and the triplet ID..
d. Edge primitive table. Edge primitives and their
topology are stored in edge primitive tables. Edge
primitive tables in the DCW database contain either
seven or nine VPF columns depending on the topology
level of the coverage. Coverages with level 1 and 2
topology require only seven columns to establish
connectivity between neighboring edges. Coverages with
level 3 topology require two additional columns
(RIGHT_FACE and LEFT_FACE) to establish connectivity
between the edge and its adjoining faces. The format
and an example of the content for an edge primitive
table are shown in TABLE 53.
e. Edge bounding rectangle. Edge primitives require a
bounding rectangle for each record in the primitive
table. The format and an example of the content for an
edge primitive bounding rectangle table are shown in
TABLE 54.
TABLE 53.
Format and example of content for edge (EDG)
primitive table.
{Header length};\
Edge Primitives;-;\
ID=I,
1,P,Row Identifier,-,-,:\
*.LFT_ID=I,
1,F,Foreign Key to Line Feature Table,-,-,:\
START_NODE=I,
1,F,Start/Left Node,-,-,:\
END_NODE=I,
1,F,End/Right Node,-,-,:\
RIGHT_FACE=K,
1,F,Right Face,-,-,:\
LEFT_FACE=K,
1,F,Left Face,-,-,:\
RIGHT_EDGE=K,
1,F,Right Edge from End Node,-,-,:\
LEFT_EDGE=K,
1,F,Left Edge from Start Node,-,-,:\
COORDINATES=C,
*,N,Coordinates of Edge,-,-,:;
1
1
1
2
6,260,210
1,0,0
29,196,14 26,12,18 -10.00,45.00;
9.90,45.00;
x.xx,y.yy
2
2
3
5
5,0,0
8,260,214 30,198,12 76,52,48
-7.70,43.69;
-7.80,43.70;
-7.90,43.80;
x.xx, y.yy
:
:
:
:
:
:
:
:
:
n
n
n
n
n
n
n
n
x.xx,y.yy
NOTES: (1) The "*" preceding the ".LFT_ID" is replaced with the
appropriate feature class name.
49
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