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International standardization agreements. |
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|  MIL-D-89009
Triplet id. A variable-length structure used to contain
information for crossing tile boundaries. The first field
contains the internal primitive id (referred to as ID). The
second field contains the tile reference coverage id (TILE_ID),
and the third field contains the primitive id in the associated
tile (EXT_ID).
Tuple.
See coordinate tuple.
Universe face. The unbounded region surrounding a level 3
topology coverage. The universe face always maintains the first
record in a face table.
Variable-length column. A column whose length is determined
by the amount of storage needed to store its contents. Useful for
character strings and coordinate strings.
Vector. Indicates a collection of coordinate tuples to
define a geographic or geometric entity.
Vector product format. A standard format, structure, and
organization for large geographic databases based on a
georelational data model and intended for direct access.
Abbreviated as VPF.
VPF table A VPF table consists of a table and (optionally)
an associated narrative table and/or (optionally) an associated
variable-length index file. Primitive tables and attribute tables
are derived from VPF tables. Feature tables are derived from
attribute tables. Attribute tables may have associated value
description tables. Primitive tables may have associated minimum
boundary rectangle tables.
Winged-edge topology. A topological construct that connects
each edge to two of its neighboring edges, allowing topologic
traversal of an edge and/or face network. A neighboring edge is
any edge that shares a start or end node with the original edge.
An edge has a start node, which is connected to the left edge, and
an end node, which is connected to the right edge.
6.5
International standardization agreements. "Certain
provisions of this specification are subject to international
standardization agreement. When amendment, revision, or
cancellation of this specification is proposed that will modify
the international agreement concerned, the preparing activity will
take appropriate action through international standardization
channels, including departmental standardization offices, to
change the agreement or make other appropriate accommodations."
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