Project Base Points And Survey Points; Making Project Base Points And Survey Points Visible; Moving Project Base Points And Survey Points - Autodesk 256B1-05A761-1301 - AutoCAD Revit Structure Suite 2010 User Manual

Project Base Points and Survey Points

Every project has a project base point
all views, because of visibility settings and view clippings. They cannot be deleted.
The project base point defines the origin (0,0,0) of the project coordinate system. It also can be used to
position the building on the site and for locating the design elements of a building during construction.
Spot coordinates and spot elevations that reference the project coordinate system are displayed relative to
this point.
The survey point represents a known point in the physical world, such as a geodetic survey marker. The
survey point is used to correctly orient the building geometry in another coordinate system, such as the
coordinate system used in a civil engineering application.

Making Project Base Points and Survey Points Visible

To turn on the visibility of the project base point and survey point in a view:
1 Click View tab
2 On the Model Categories tab of the Visibility/Graphics dialog, scroll down to Site, and expand
3 To display the project base point, select Project Base Point.
4 To display the survey point, select Survey Point.
You can also click
project base point and survey point in a view.

Moving Project Base Points and Survey Points

The project base point and the survey point can be
in all views. To switch between the clipped and unclipped states, first click the point, and then the icon.
The following table describes how clipping and unclipping affects these points when you move them in a
view.
Clipped
Project Base Point
Moving a clipped project base point is the
same as using the Relocate Project tool.
See Relocating a Project
Project coordinates do not change for
the model elements.
Shared coordinates change for the
model elements.
1302 | Chapter 21 Working with Linked Models
Graphics panel
it.
(Reveal Hidden Elements) on the View Control bar to turn on the visibility of the
on page 1300.
and a survey point
Visibility/Graphics.
(clipped) or
Unclipped
Moving an unclipped project base point
repositions the project coordinate system
relative to both the model geometry and
shared coordinate system.
Project coordinates change for the
model elements.
The shared coordinates of the project
base point change in the shared co-
ordinate system. (The project coordin-
ates of the project base point never
change.)
Shared coordinates do not change for
the model elements.
, although they might not be visible in
(unclipped). By default, they are clipped