Autodesk 15606-011408-9005 Tutorial - Page 256
Tutorial: Managing Data From Different Sources
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■ Save a map in DWG format so AutoCAD users (without access to AutoCAD Map 3D) can edit map data. Select the appropriate method to move data into or out of a map: Method Update Options Attach a drawing to your map and then query in the objects to use. If you change the objects, you can update the original drawing or not. Connect to geospatial (FDO) data. You can maintain a live connection to the data, or work offline and update your data store when you finish. Import data into your map, automatically converting it to DWG format. Importing inserts a "snapshot" of the data. You can import from various geospatial sources. When you use this option, you do not affect the original data store. Changes in that data store do not change your map. Export drawing objects to various formats. No geospatial features are exported, but you can save all the features and objects in your map to AutoCAD DWG format and then export it. The original data is unchanged. Use Bulk Copy to convert geospatial data The original geospatial data source is un- to another geospatial format. changed. Export your map or individual drawing layers to the Autodesk SDF format, or to SHP, ArcSDE, or Oracle. Then use Bulk Copy to move it to other formats. The original DWG data is unchanged. Converting Drawing Layers to Feature Classes In an AutoCAD drawing, you can use layers to organize information. For example, an AutoCAD drawing can contain separate layers for roads, parcels, and so on. Geospatial data stores use schemas for this purpose. In a schema, each feature class can serve the same purpose as a drawing layer. SDF is a proprietary Autodesk format. It supports a schema that can include multiple feature classes within a single file, the same way that a single drawing can include multiple drawing layers. In this tutorial, you create an SDF file with a schema whose feature classes reflect the layer structure of a drawing 248 | Chapter 7 Tutorial: Managing Data From Different Sources