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User coordinate system (UCS)

Last updated September 10, 2018 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
2018i

User coordinate system (UCS)

User coordinate system (UCS)

UCSlocal coordinate system defined by the user and used in a drawing view

User coordinate system makes it easier to place drawing objects, because the user can place the drawing objects relative to a user-defined point of origin, or a base point in the drawing view.

Tekla Structures displays the user coordinate system symbol in the current drawing view when the user creates, copies, moves, or modifies drawing objects.

is a local user coordinate systemlocal coordinate system defined by the user and used in a drawing view

User coordinate system makes it easier to place drawing objects, because the user can place the drawing objects relative to a user-defined point of origin, or a base point in the drawing view.

Tekla Structures displays the user coordinate system symbol in the current drawing view when the user creates, copies, moves, or modifies drawing objects.

you can use in a drawing viewview that includes selected model objects or an area in the model, that is represented in a drawing

A drawing view is a container for model and drawing objects.

A drawing can include several drawing views, which usually are two-dimensional views, plane views, to the model.

Examples of drawing views in Tekla Structures include main views, section views, single-part views, and 3D views.

. It is easier to position drawing objects in view, when you can place objects relative to a user-defined point of origincenter of the coordinate system where the axes intersect and form a fixed point of reference for the geometry of the surrounding space

, or a base pointpoint in a model that is used to define a starting point in surveying and that is used as an anchor point in coordinate and height transformations

A Tekla Structures project can have several base points but only one of them can be the project base point.

Base points allow the use of another coordinate system needed for interoperability and collaboration. Base points can also be used in drawings, and in reports and templates. Model origin is the default base point in Tekla Structures.

Base points are also called control points.

, in the drawing view.

Tekla Structures shows the UCS symbol in the current drawing view, when you create, copy, move, or modify objects.

You can define a different point of origin for the UCS for each drawing view, and change the UCS point of origin as often as you like.

The following example shows several views, each with their own UCS.

Note:

To position an object using the global coordinate systemcoordinate system that reflects the entire space of a model

A green cube represents the global coordinate system and lies at the global point of origin in the 3D view.

, you need to calculate the coordinates of the object from the point of origin of the drawing, not a drawing view.

Set a new UCS

You can set a new UCS (user coordinate system) using one point or two points.

  1. Open a drawing.
  2. On the Views tab, click User coordsys and click one of the following commands:
    • Select Set origin to set the new UCS using one point.

    • Select Set origin by two points to set the new UCS using two points.

    Tekla Structures displays the UCS symbol with a crosshair marking the center point.

  3. Click the view where you want to place the origin.
  4. If you are using two points, pick a point to define the direction of the x axis.

Toggle between two user coordinate systems

You can toggle between two user coordinate systems that have the same point of origin: the UCS following the axes of the drawing view and the oriented UCS you have created.

  • To toggle between the coordinate systems, open a drawing, go to the Views tab and click User coordsys > Toggle orientation ( Ctrl + T ).

Reset UCS

You can reset the UCS to its original position in the current drawing view or in all drawing views.

Do one of the following:

To

Do this

Reset the UCS in the current drawing view

In an open drawing, go to the Views tab, and click User coordsys > Reset current ( Ctrl + 1 ).

Reset the UCS in all drawing views

In an open drawing, go to the Views tab, and click User coordsys > Reset all ( Ctrl + 0 ).

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