About Managing Survey Extended Properties

Use extended properties to import and export Survey LandXML attributes and to create, assign, and view user-defined attributes.

Using the extended properties command, you can do the following:

• Import survey LandXML data and attributes into the survey database.
• View survey LandXML attributes and modify user-defined attributes using the survey user interface.
• Export survey LandXML data (with attributes) to a specified LandXML file.
• Insert survey points into a drawing with the survey LandXML and user-defined attributes assigned.
• Complete round-tripping of Survey LandXML and user-defined data using the Import Survey LandXML and Export Survey LandXML commands on the Survey tab in Toolspace.

Extended Property Definition Files

To display extended properties, you must specify an sdx_def file that contains definitions, or import a LandXML file with the Create New Definitions Automatically option selected in the Survey Database Settings. By default there are no extended properties defined in the sdx_def file.

Autodesk Civil 3D installs sample sdx_def files at the following location:

C:\ProgramData\Autodesk\C3D <version>\enu\Survey

You can edit default sdx_def files or specify a pre-defined schema with specialized LandXML and user-defined properties contained in an existing sdx_def file. For example, the LandXML - Standard .sdx_def file contains numerous SurveyFeatureClass items. You can open this file in a text editor and make any necessary edits to streamline this file to meet your needs. Use the Save As command and then save the file with a new name.