Autodesk 15606-011408-9005 Tutorial - Page 97

The order in which you select the points and the spread of the points affects the results. For complex curved figures, more vertices result in a more accurate alignment. ■ Select the object to align it with the reference area. ■ Enter s to select the objects to rubber sheet. ■ Click the subdivision block to select it. ■ Press Enter to complete the process. For more information about this procedure, and to see an animation of the rubber sheet procedure, see Georeference parcels by rubber sheeting. Where you are now You created a drive alias for drawings stored on a shared drive. You georeferenced drawing objects, using the Rubber Sheet command to align them with known locations. To continue this tutorial, go to Lesson 2: Clean Up Your Drawings (page 89). Lesson 2: Clean Up Your Drawings Drawings can contain various kinds of errors that make accurate mapping difficult. For example, digitizing from a paper map can produce lines that were actually creases in the paper. Drawings edited by multiple people can contain duplicate lines or objects. Finding duplicate objects in the same location can be nearly impossible without the right tools. If lines in your drawing do not connect precisely at endpoints, data that appears to be precise can actually be inaccurate. Locating these issues visually can take hours. AutoCAD Map 3D has an option called Drawing Cleanup to help you correct common geometry errors. In this lesson, you clean up a street map by deleting duplicate objects and extending undershoots. It is best to perform each operation separately, so you can see the result of each operation before performing the next one. Optionally, you can use a cleanup profile to automate the drawing cleanup process with scripts or to share settings with other users. Lesson 2: Clean Up Your Drawings | 89