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How to use Autotrace functionality in MapInfo Professional

Products affected: MapInfo Professional

 
Autotrace Objects 

You can trace the nodes of an object, for example, the Yucatan in Mexico using the Polyline or Polygon tools. This makes it easier to digitize objects that share a border because you don't have to re-digitize the shared border. You can also use this feature to trace an existing polygon/polyline network, for example, a street, a county, or some other polyline or boundary. A Status Bar entry displays showing that this mode is enabled. 

To trace a border: 

Open a Map layer you want to trace a polygon or polyline on. 

Make the layer editable.

Press the S key to turn on the Snap process and the T key to turn on the Autotrace functionality.

Select the Polygon  or Polyline  tool from the Drawing toolbar and select the first node you want to trace.

Drag the mouse along the nodes of the line or object you want to trace.

The rules that apply to AutoTrace are: 

To enable the AutoTrace mode, you must use the Polygon  or Polyline  tool 
You must press S to enable the Snap feature to use the AutoTrace feature

You can use the Shift/Ctrl key functionality for this mode. When you AutoTrace a polygon, the path contains the least number of nodes necessary to complete the AutoTrace, which is similar to the Shift key behavior. If you want to trace the longer path, press the Ctrl key to override default AutoTrace direction. When you are autotracing a closed polyline, the trace line never crosses the start and end points of the polyline (so the Ctrl key has no effect). 

 
UPDATED:  September 22, 2017