| With the digital line data thoroughly gleaned of digitizing errors and appropriately attributed, the next phase of the project was ushered in: formulating a process by which to extract a digital raster graphic (DRG) from the base information. Experimenting with such a process under ArcView 3.2 soon revealed that the system’s interpolative algorithms only produced DRGs, termed “grid” in ESRI applications, with limited z-values. The results of the interpolations were highly terraced images, yielded from essentially non-continuous pixel values, a fact of an extraction algorithm using high-order exponential equations. Thus the effect of realism was void in these interpretations. Exploring documentation and various user group sources concerning ArcView spurred very little on the lines of enhanced grid extraction, therefore a more comprehensive GIS was in order in tailoring capabilities to the model’s needs. |