Edit-Assign Grade Rules

This command allows you to elevate other types of linework (besides lot edges and pads) with respect to a single reference elevation and offset point (or two single points if elevating a previously-elevated object using Lot Edge rules). This differs from the typical Elevate Lot Edges By Grade Rules in that instead of referencing the object to a reference line of constantly changing elevation, you will be setting a single point (or two single points) as a starting reference value.

You choose the linework you wish to elevate and establish for it a reference elevation and offset, if any. You may enter these values directly, or pick an object from the screen to establish the reference. If you leave the fields at their default of 0.000, you will elevate the selected object with respect to that zero reference elevation, so make sure that you have some valid reference data set in the fields. If you are elevating an object that has not previously been elevated using Elevate Lot Edges By Grade Rules, you will establish a single reference point/offset. If elevating a previous "Lot Edge Rules" object, you will establish two reference points/offsets, one for the front, and one for the back. You will also establish the grade rule for the back portion in addition to a single set of rules for a 2D object. (see dialogs below for differences).

The settings work much the same as the other grade rules (lot edges and pads) except that instead of elevating things based on a linear, changing reference elevation line, you are setting a single point of reference (or two single points) to elevate the selected object.

Prompts

Select grade polyline:select the linework you wish to elevate

If the selected object has not been previously elevated using Elevate Lot Edges By Grade Rules, you are then presented with the following dialog to establish the relationship of the selected linework to a reference elevation and offset. You may enter the values directly, or pick a point in the drawing and the values are calculated from the picked point.

If selected object has been previously elevated using Elevate Lot Edges By Grade Rules, you will be presented with the next dialog, which illustrates the difference in the two cases:

The fields and their values function the same as those in Define Lot Edge Grade Rules, so please refer to that command for more information.

Pick reference point:  <Osnap on>select a point in the drawing as a reference, and the values are calculated and populate the dialog fields for you.
Select grade polyline (Enter to end): select another, or press Enter to conclude selection

Pulldown Menu Location: 3D Data >> Elevate By Grade Rules
Keyboard Command: edit_grades
Prerequisite: linework to elevate