Figure 3-6. Prompt for depth exaggeration

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Figure 3-4. Horizontal averaging of cross sections promp t

Figure 3-8. Interpolation method selection box

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Figure 3-6. Prompt for depth exaggeration

HyPAS then prompts for the Output Grid Specifications (Figure 2-8). The

output grid extent parameter def ines the external limits of the resulting interpolation.

Because HyPAS is setting the display to the extent of the data, the default response

Same as Display is the best choice. The other three parameters--Output Grid Cell

Size, Number of Rows, and Number of Columns--define the raster intensity of the

These parameters are connected; therefore, changing any one changes all. The

user may want to adjust this. Increasing the number of cells smoothes the output.

The trade-off is that it decreases the speed of the interpolation process. The default

value should be adequate for most applications, although rounding the cell size will

increase clarity. HyPAS then prompts for the Field to Interpolate (Figure 3-7).

Choose the desired constituent or field and click OK.

Figure 3-7. Menu to select field to interpolate

There are several interpolation options to choose from, as shown in Figure 3-8.

Each option will affect the data set differently, so special care should be taken to

ensure the desired result. Please See the ArcView User's Guide for descriptions of

these interpolation routines.

3-3

Chapter 3 Cross-Section Analysis

Western Governors University

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