A logical grouping of data. Layers are like transparent acetate overlays on a drawing. An AutoCAD layer differs from a map layer in . 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 , , , or .
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.
All the settings for a specific map, such as the data to include, the appearance of each , and the legend definition. A display map can include objects from attached drawings, images, and s stored in s. For example, it can include data from Oracle databases, SDF or SHP files, and ArcSDE. One map can include multiple display maps.
An abstraction of a natural or man-made real world object. A spatial feature has one or more geometric properties. For example, you can represent a road feature with a line, and a hydrant with a point. A non-spatial feature does not have geometry, but can be related to a spatial feature that does. For example, a road feature can contain a sidewalk feature that is defined as not containing any geometry. See also , .
A method that converts the coordinates representing latitude and longitude into an AutoCAD Map 3D map Cartesian coordinate system. This method accounts for the curvature of the surface of the earth with a projection. A coordinate system can use a projection, an ellipsoid definition, a datum definition, standard parallels, and a central meridian to define it.
To make all or part of a disk file read only so that other users on a network cannot modify it. Object locking applies to objects that another user is editing. File locking applies to entire files, for example when an AutoCAD user wants to open a file while the file is being edited in AutoCAD Map 3D.
All the drawing objects that have been created using a specific object class definition. Use object classification to organize objects in your drawing based on the real-world features they represent, such as roads. Object classes allow you to create new objects that automatically have the appropriate properties and values for objects in your drawing.
A closed area that stores information about its inner and outer boundaries, and about other polygons nested in it or grouped with it. In a polygon topology, any lines or arcs in the drawing can enclose the polygon. In addition, AutoCAD Map 3D supports a polygon object, sometimes called an or mapping polygon.
The ratio of the distance on a paper map to the distance on the ground. A scale of 1:100,000 (also represented as 1/100000), means that a distance of one unit on the map corresponds to 100,000 units on the ground. On a digital map, scale represents the scale of the map from which the digital map was derived.
A paper space layout you can use as the basis for a new layout. The paper space objects and page setup in a template are used for any new layout you create with that template. You can keep, delete, or modify any of the objects from a template you use. No model space objects are included. Layout templates are identified with a .dwt file extension.
A that varies the appearance of an element in a layer based on the value of a specific . For example, instead of coloring lakes blue, you could vary the shade of blue based on the depth of the lake. Instead of choosing one line width for all roads, you could vary the line width based on number of lanes.
A defined DWG block that can include title information, such as your company or group name and the name of the map. Many organizations have standard title blocks to insert in this element. You can define certain attributes of the title block from within your template. When you generate the map book, you can choose a drawing for the title block. That drawing replaces the original title block contents defined in the template layout.