Autotek autocad raster design 2010 用户手册

 (page 351) provides many settings

for the control of Raster Design tools and operations.

Any settings you specify here persist as default settings for the next session.

These settings are used in vectorization to specify vector line widths for
contours based on their elevation interval.

For instance, you might set the elevation interval for major contours to 50,
and the elevation interval for minor contours to 10. If you then followed a
contour and set the elevation to 200, the resulting vector contour would be
assigned to the major layer. Likewise, if you followed a contour and set the
elevation value to 220, the resulting vector would be assigned to the minor
layer.

TIP If you are using vector separation to control the layer and polyline width of
vectors created from the Contour Follower, it is a good idea to use the same value
for the Minor Interval and the Elevation Interval on the VTools Follower tab of the
Raster Design Options dialog box. For more information, see 

 (page 270).

1 Click Image menu  ➤  Options. The 

 (page 351)

dialog box is displayed.

2 Click the VTools General tab.

3 Click the Vector Separation button.

4 Click the 

 (page 375) tab.

5 If you want to assign layer and polyline width values to contours based

on their elevation interval, select Separate Contours By Elevation.

6 If you have ProdNameShort installed on Autodesk Land Desktop and you

want to use its settings for minor and major layers and intervals, select
Use Autodesk Land Development Desktop’s Settings.

7 In the Minor section, set the elevation Interval for minor contours, then

select a default Layer and specify a Polyline Width for these contours.

244 | Chapter 10   Configuring Raster Design