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Glossary
AcDbEntity
A standard AutoCAD object, such as a line or arc, that can have properties such
as color, linetype, or lineweight.
adjacent arrows
Polygonal objects in a map book template that display the map tiles
immediately contiguous to the current one.
attribute data
Tabular data that describes the characteristics of a
feature
(page 311)
, for example,
the number of lanes and pavement-type belonging to a road feature. See also
external data
(page 311)
,
object data
(page 313)
,
property
(page 313)
.
AutoCAD layer
A logical grouping of data. Layers are like transparent acetate overlays on a
drawing. An AutoCAD layer differs from a map layer in
Display Manager
(page 310)
. A Display
Manager layer references a feature source or a drawing source, contains styling and theming
information, and optionally has a collection of scale ranges. See also
layer
(page 312)
,
drawing
layer
(page 311)
,
feature layer
(page 311)
, or
surface layer
(page 315)
.
Autodesk Design Review
A free software utility that allows anyone to view, print, measure,
mark up, and revise 2D and 3D designs created by Autodesk design software. You do not need
the original design-creation software to use this tool.
buffer
A zone of a specific radius created around a selected feature. Used to select features
within a specific distance of another feature. In AutoCAD Map 3D, you can define buffers for
drawing topologies and for features, but you define them differently.
COGO
Short for Coordinate Geometry. COGO inquiry commands extract geometric
information from drawing objects such as lines, curves, closed polylines, and polygons. Use
COGO input commands to enter accurate geometry when creating objects. For example, you
can create parcel boundaries from legal documents or survey data.
Enter COGO commands from a dialog box or “transparently.” Use transparent COGO
commands by entering an apostrophe ( ' ) before the command name.
constrained
Restricted to particular values. A feature class property that is constrained is
validated when a new feature is added to that class. For example, a "minor road" feature class
may be constrained to be 25, 30, or 40 miles per hour.
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