Create a Surface in the Drawing from the Contour Data

Additional Exercise;

Although survey data is the ideal choice for creating existing ground surfaces, there will be many times when you are asked to create surfaces from alternate sources of data. For example, to do a preliminary hydrologic analysis, you need terrain data for a large area that drains to the stream on the south side of the project. It is not feasible to survey an area this large with conventional surveying—in fact, that level of accuracy is not needed for this type of analysis. For this reason, GIS contours will be used to create an existing ground surface.

Open the drawing named Surface From Contours.dwg or (Surface From Contours.dwg (METRIC)) located in the Exercise_04 class data folder. Do the following:

1. Create a surface from the contour data in the drawing.
2. Use the green polyline in the drawing to create an outer boundary for the surface.
3. Perform an elevation analysis to illustrate the distribution of high and low elevations across the surface.
4. Assign the C-Existing Contours (5') (C-Existing Contours (2m)) style to the surface.
5. Create several spot elevation and slope labels on the surface.
6. Create contour labels for the surface.

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How to create Surface in the drawing from the Contour Data