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. Use the Scatter Options dialog. Open the Scatter Options dialog. Select or delete duplicate points. Select or delete long triangles. Select thin triangles. Use a triangulation optimization option. 2. Manually remove points. Use Select Scatter Point tool to select erroneous points in the scatter set. Review and edit point data in the Edit Window. Delete erroneous points.

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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.