North Rotation in Land Development Desktop |
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Overview: North
rotation is a once and done command used to re-orient a drawing on the
screen. North rotation is
similar to dview twist except that only one rotation is used per drawing
to establish North. North
rotation should be applied in model space. Thereafter re-orienting a plan
(say for a winding roadway for example) can be done with dview twist or
sheet manager. |
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| In the following example the plan has North straight up (the default). We ideally want the plan square on the screen, however. |  |
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The
easiest one step solution is North rotation using the following steps… |
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Draw a reference line anywhere on the screen at due North using Line by direction on the cogo menu. |
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1.
Pick Lin/Crv then Line By Direction 2.
Pick a point on-screen near the site, you’ll see this at the
command line: Command:COGO Line by direction Starting
point: Quadrant
(1-4) (Azimuth/POints): 3.
Type “1” for Northeast 4.
Enter “0” for the bearing 5.
Enter a distance long enough to be visible relative to the site
(i.e. 500’ or so) Thaw
and turn on ALL layers Remove
all points from the drawing… |
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Supply
the following answers to the command line prompts: Command: Remove
points from drawing by (Number/<Selection>): n Also
remove description key symbols (Yes/No) <No>: n Points
to remove: 1-9999 (all points in other words) Removing
points from the drawing ... Next
rotate all linework (including the reference line) around 0,0 (NOTE: It
is critical that you rotate around zero, zero) until the site is
aligned as you want it. The easiest way is to use a REFERENCE rotation
using 0,0 and picking a point on the site. |
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| The example now looks as shown to the right (notice that the bearings on the auto-labels have changed because we have not set North yet) | 
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| Next, apply the North rotation with settings as follows: | |
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Click “Pick Points”. First
point: (pick south end of your reference line) Second
point: (pick North end of your reference line) Then
select any labeled lines, right click and pick “update labels”
(another good reason to leave the update toggles ON in the label
settings – if they were off you would have to relabel all those
bearings). |
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| When
you insert the points they will fall where they should but the coordinates
will be the same (also any surfaces, alignments, profiles, etc. will be in
tact and unaffected).
When used in this manner North rotation will never change a coordinate, or affect any design data. There are instances in which you may want coordinates to change (such as when changing a project azimuth). In such instances it is best to consult with someone familiar with Survey just to be safe. |
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