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AutoCAD 2005 for DummiesIf you start from an appropriate template drawing, as described later in this chapter, the MEASUREMENT system variable will be set correctly and you wonБЂ™t ever have to think about it. Weighing your scales The next decision you should make before setting up a new drawing is choosing the scale at which youБЂ™ll eventually plot the drawing. This decision gives you theб drawing scale andб drawing scale factor БЂ” two ways of expressing the same relationship between the objects in the real world and the objects plotted on paper. б You shouldnБЂ™t just invent some arbitrary scale based on your CD-ROM speed or cameraБЂ™s zoom lens resolution. Most industries work with a fairly small set of approved drawing scales that are related to one another by factors of 2 or 10. If you use other scales, youБЂ™ll at best be branded a clueless newbie БЂ” and at worst have to redo all your drawings at an approved scale. Table 3-1 lists some common architectural drawing scales, using both English and metric units. (Ratios such as 1:200 are unitless ...» |
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