Imposing new thresholds

Once you have found boundaries, you can easily re-draw boundaries or subboundaries using different thresholds.

  1. First, choose "Impose New Thresholds" from the "Boundary" menu or the pop-up menu you get by right-clicking on the boundary of interest in the project window.

  2. When the "Impose New Threshold' dialog appears, you can change the threshold values and create a new boundary and/or subboundary layer.

  3. Choose the boundary you wish to change from the pull-down list of all boundaries in the project.

  4. Enter a name for the new boundary, or accept the default name.

  5. As before, choose between crisp and fuzzy boundary types and the new thresholds.

  6. As before, you can choose to see the histogram of BLVs, but this will be the same as it was when the original histogram was generated during the delineation of the original boundary.

  7. Click "OK", and a dialog will ask if you would like to view the new boundary in a map. Choose the map from the pull-down menu. You may select "New Map" to create an additional one.


Hint: You may wish to compare boundaries in the same map using different color schemes. As the map layers obscure those layers beneath them, you will want to place the layer holding the most restrictive boundary (e.g., highest BE thresholds, most stringent gradient angle thresholds) on top. Then, the additional points and connections that occur with the less-strict rules will be easy to see.

You can change map layer order by dragging layers around in the map layer pane. You can change the properties of individual map layers by selecting them in the map layer pane, right clicking on the map, and choosing "Properties."


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