When using some of the options from the lines pop-up menus, you will be asked to specify how you would like the heights of created points to be calculated. An example of such a dialog box is shown below.
The Method group specifies the method by which the height of any new or amended points is calculated and you should note that the number of radio buttons will vary depending on which n4ce option is being used. Also, the height method for each option using this dialog will be remembered independently of the other options. The possible options for the height calculation method are:
Null - The point will be 2D and is assigned no height.
Typed - The point is given a known height. This is entered in the Height field in the Parameters group of the dialog box.
Linear Interp - The point height is interpolated along the indicated line feature segment.
End Point - The point height is taken from the end of the indicated feature, for example, the end point of a line being extended.
First Segment - The point height is interpolated along the first line feature segment that has been indicated.
Second Segment - The point height is interpolated along the second line feature segment that has been indicated.
Average - The point height is the average of the previous two.
For some extend and merge functions, there will also be a check button called Move on Lengthen. When these functions, n4ce will calculate a new location and this option allows you to move the end-point rather than append an additional point.
The Parameters group gives options which further refine creation or modification of points.
Pull Back 1mm - is used in situations where you create points that would be directly under or over a line feature segment. This happens when extending the ends of lines to meet a reference object. If this is checked, the extended points will be moved back 1mm along the approach direction of the line segment being extended.
Duplicate on Ref - is also used where you create points that would be directly under or over a line feature segment. If this is checked, a second point is created on the reference string at the intersection of the two features concerned.
Copy Dimensions - allows you to copy the dimensions of a point being extended to any new points that are created. This may be necessary when extending the first point of a hedge that has a width dimension.
No Point or Height - specifies that you do not want to see the point marker or height text for the created points. It may be that for 3D modelling purposes, you wish to give a valid height to the new points so that it appears correct when exporting to 3D AutoCAD DXF Files. This is performed by adding the No Height and No Point Comma Codes to the new points.
Prefix Created Points - will instruct n4ce to add a prefix of E to the numbers of any new points.