Autodesk 00126-050008-1620A - Autocad 2006 Essentials User Manual page 173

WiseImage – User's Guide
After you have indicated one or several points, setting the initial tracing
parameters, the following prompt appears in the command line:
[Direction/Backstep/backSegment/drawLine/pan2Center/Redraw/exit/caNcel]<Next
point or ENTER to eXit>:
3. To trace the next part of the raster line in the current direction, indicate a point
on it. WiseImage traces a raster line up to the nearest node.
- or -
To change the tracing direction, select the Direction option from the cursor
menu, enter a capitalized letter of the option name in the command line or
indicate any point on the traced polyline near the opposite vertex.
- or -
To create one linear polyline segment manually (without tracing), select the
drawLine option. Then indicate a point. The line section will link the indicated
point with the last trace point.
This option allows you to eliminate breaks of a raster line, by drawing a straight
segment of the polyline.
178
The example shows an isoline on a
raster map broken with text.
If you specify the raster line
extension without using the
drawLine option, then one linear
polyline segment will fill the gap.