Template:GMS Review-Edit Elevation Data Workflow

1. Review elevation data for errors.

1. Use the Dataset Info dialog. Find the "Z", "elevation" or "depth" datasets on the geometric object (mesh, TIN, grid, raster) that is being reviewed Right-click on elevation data and select Properties. Review information in the Dataset Info dialog to see that the range of values are as expected. 2. Use contour display options. Turn on Contours in the Display Options dialog and set contour options. The "Color Fill" option is recommended for this. Look for inconsistent points (points with values much higher/lower than their neighbors or regions where no data points exist). Verify that the region being modeled is covered by the elevation/depth data and there are no holes.

2. Remove erroneous points and triangles.

After reviewing the imported data, points or triangles covering regions of no data should be deleted. 1. Edit dataset values. Open the Dataset Info dialog through the dataset Properties right-click command. Open the Edit Dataset Values dialog. 2. Define active or inactive points. Open the Dataset Info dialog through the dataset Properties right-click command. Open the Active/Inactive Flags dialog. 3. Manually remove points. Use the Select Scatter Point tool to select erroneous points. Review and edit point data in the XYZF Bar. Delete erroneous points.

3. Merge elevation datasets.
Using the Select Scatter Point Set tool, select multiple scatter point sets in the Graphics Window. Select the Scatter Points | Merge Scatter Point Sets command. In the Scatter Point Set Name dialog assign a name to the new scatter set.