Add Bearings...
The Add Bearings... option allows you to add the bearing of each line in a line feature theme to its record in the attribute table. You can subsequently subset the line features by querying the attribute table and defining a range of suitable orientations. In order to create a new theme from the selected subset, make the theme active, then select 'Convert to Shapefile...' from the Theme menu.
This is a simple calculation involving the first and last vertext in each line only.
To calculate bearings for a line theme:
1. Select Add Bearings... from the SDM menu.
2. Select the line theme you want to process from the dialog:
3. Click 'OK'.
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