An annotative object whether it be text or a block is set to a scale in model space at a particular paper height then when the viewport scale is changed the object changes its scale based off that factor. This topic describes the types of attributes you can encounter when working with CAD datasets.Annotation text objects in AutoCAD are used in drawings to determine text height or the overall scale of an annotation text object. Types of user-created attributes in CAD drawingsĭWG/DXF and DGN formats each use different methods for storing user-created attributes.
This topic explains what comprises a CAD file and how DWG/DXF and DGN formats organize data. Unlike a GIS, all data represented by a CAD dataset is normally contained in a single source file. This topic explains CAD coordinate systems and why integrating CAD data with maps can sometimes be problematic. The issue of scale defines a fundamental difference between how GIS and CAD systems utilize coordinate systems. To learn more about source CAD data, you can reference the following topics: Topic par extension to identify drawings containing parcel information. This can be utilized to denote content for example, you can save a DGN file with a. A unique feature of the DGN format is you can save it with nonstandard file extensions. The DGN format is not as prevalent as the AutoCAD formats but remains a critical format for large engineering projects that use CAD data.
#Best way to organize cad drawing for a project software
Its usefulness is declining as software applications increasingly support the DWG format directly with licensed read/write technology from Autodesk or from third-party providers such as the Open Design Alliance. The DXF format is an interchange format originally developed in 1982 by Autodesk for enabling interoperability with other software applications. In addition to Autodesk's proprietary versions, several third-party variants are also common. The DWG format is the most widespread format used to create and share CAD data. Both formats are capable of supporting 2D and 3D information. FormatsĪutoCAD and MicroStation each use a proprietary file-based vector format. The datasets can vary in size, scale, and level of detail they can represent information about the inside of a building at a project scale or a survey plat at a regional scale in a projected grid zone. CAD data can serve a range of purposes-from a design plan that is printed as a drawing or submitted as a legal document, to a repository for ongoing as-built information. CAD dataĬAD systems generate digital data. This topic describes in general terms the types of data generated by both systems. Organizations involved in the engineering, architecture, surveying, and construction industries use them to provide a variety of services.ĪrcGIS for Desktop accepts data generated by AutoCAD- and Microstation-based applications. These systems are designed to accommodate a wide range of applications.
Currently, AutoCAD and MicroStation are the two most widely used general-purpose CAD platforms. Computer-aided design (CAD) is a system of hardware and software used by design professionals to design and document real-world objects.