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
output grid.
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
Previous Page
