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AVEVA™ E3D Design

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HomeAVEVA™ E3D Design...E3D DesignDesign and ModellingInterfacesMultiCAD ImportSettingsReference DatumCurrent page
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Reference Datum

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Use to position, orientate and scale the imported model as part of the import process. The position and orientation can be changed later using the common positioning and orientation functionality available in AVEVA E3D.

Scaling is particularly necessary if the input file does not contain units information (for example in a .stl file), or if the units information is incorrect (for example metres instead of millimetres).

Reference datums are shared between IFC Import, IFC Export and MultiCAD import, so some IFC terms are used. In particular the positioning facilities are more important when importing IFC models with geographic coordinates outside the range of the AVEVA E3D Design spatial map in earlier versions of AVEVA E3D Design.

Note:
The way in which position and orientation are designed for the IFC Import case is where the IFC file contains coordinates in a geographic coordinate system and these must be switched to position the imported objects in a more local project coordinate system.

For example:

The objects in a file have locations near 600km North and 300km West. A reference datum is created at 600km North and 300Km West. Import the file with respect to this datum, the geometry will be located in the E3D database near the origin.

Note:
The reference datum is not where to position and orientate the object but where in the files’s coordinate system to position at the E3D origin.

Use the Reference Datum pane of the MultiCAD Import window to select a suitable reference datum, the Use Reference Datum check box is not checked by default.

Use the Reference Datum

Click to check the check box to enable the reference datum functionality

Reference Datum

Use to select the default, project specific reference datums or create a new reference datum.

  • IFGLOBAL (default read only, no shift, rotation or scaling)

  • new Reference Datum - create a new reference datum using the Reference Datum window.

Inspect Reference Datum Properties

Displays the Reference Datum window populated with the name, datum properties, orientation and scale for the selected reference datum.

Delete Reference Datum

Deletes the selected reference datum.

Reference Datum Window

Use to review, edit or create a new reference datum, for the purposes of this guide a new reference datum will be created.

AVEVA E3D DesignName

Enter a name for the new reference datum (choose a name that is easy to identify and to reuse)

Datum

Format

Defines the position of the reference datum (use the common positioning functionality).

Orientation

Defines the orientation of the reference datum, default is Y is N and Z is U. Use the Orientate window to manually edit the orientate the reference datum.

Scale

If required, enter a scale factor (default is one).

For example - enter 25.4 to convert inches in the input file to mm to be written to the database.

Edit

Edit the position, orIentation or scale of an existing reference.

Note:
This functionality is only available when an existing reference datum is selected and Inspect Reference Datum Properties is selected.

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