Validating 3D Source Data

Prior to creating the site model, problems can be avoided by checking the 3D source data for errors with the Validate 3D Data command.

Even if a site model already exists, the source data can be checked. If problems occur due to erroneous DTM source data, error alerts are automatically displayed.

A site model with errors can still be created; however, results may not be as expected.

The following problems can generate errors:

Duplicate 3D data points or polygons

3D data points that are coincident or vertically placed

Crossing contours (3D polygons) in the 3D source data

To validate 3D source data:

1.	Select the source data (3D loci, 3D polygons, or stake objects) to be checked.

2.	Select Landmark > Validate 3D Data (Landmark workspace) or AEC > Terrain > Validate 3D Data (Architect workspace).

3.	If the source data are valid, a dialog box states that no problems were found. Proceed with creating the site model as described in Creating the Site Model.

4.	If there are errors in the source data, the Problems with DTM Source Data dialog box opens.

Problems encountered are listed, and some conditions have an associated button for correcting each error by modifying or deleting the erroneous data.

If a site model already exists, the problem data can be viewed by selecting the site model and selecting Modify > Edit Group, or selecting Edit Source Data from the Site Model context menu. Problem data conditions are highlighted and annotated.

5.	When problem correction is complete, click Close.

Select Validate 3D Data again to ensure that the errors have been corrected.