Autodesk 15606-011408-9005 Tutorial - Page 317
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Glossary 9 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. 309
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