                                                                atrbt_contur
Chapter 9 Input Modes

The atrbt_contur command establishes a mode for associating elevational
attributes with contour line objects.  It is an extremely efficient method for
attaching the attributes by identifying increment or decrement profiles.

atrbt_contur

    Sets mode for contour digitizing.

         atrbt_contur action [elev]

    Sets the graphics input mode to digitize contour attributes.  The start
    function is executed to begin a linear profile.  The profile is defined by
    subsequent execution of increment and decrement functions.  If elev is
    specified, that value will be assigned to the first line crossed by the
    profile.  Otherwise, the beginning elevation attribute will be acquired
    from the first contour line crossed by the profile; it  must already have a
    valid, numeric attribute.  Subsequent contour lines will be assigned
    elevation attributes based upon an increment/decrement profile and the
    contour interval value from the map's header file.  The action  code will
    establish whether or not multiple attributes are allowed (for checking).
    If a mistake is made while in atrbt_contur mode (e.g., user presses
    increment when they meant to press start and many contours are mislabeled
    as a result), then executing the undo function will remove all attributes
    from the mislabeled contours.  While this doesn't restore the correct
    labels (attributes), it does remove the incorrect ones and identifies the
    contours which need to be relabeled.
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    Options/arguments:

         action    Attribute action code, where:
                   0 =  Replace all attributes w/single new one. 
                   1 =  Replace/set 1st attribute, leave others. 
                   2 =  Replace/set 2nd attribute, leave others. 
                   3 =  Insert 1st new attribute, increment others by one
                   4 =  Prefix 1st existing attribute. 
                   5 =  Suffix 1st existing attribute. 
                   6 =  Add a new (additional) last attribute. 
                   7 =  Remove ALL attributes for one object.
*                  8 =  Prefix 2nd existing attribute.
*                  9 =  Suffix 2nd existing attribute.
         elev      Elevation (attribute) value; numeric
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    Example(s):

    To begin a linear elevation profile for the attributing of lines (1
    attribute only) with a starting elevation of 4600 feet, enter:

         atrbt_contur 0 4600



    If a valid elevational attribute has already been assigned to the line
    which will be crossed first along the linear elevation profile, and if
    multiple attributes are to be allowed, enter:

         atrbt_contur 3
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    See also:
              atrbt_dig, decrement, header, increment, start
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