Читать книгу GIS Research Methods - Steven J. Steinberg - Страница 64

When preparing an analysis in GIS, you must work through four distinct phases of abstraction, or modeling, in sequence:

1. Evaluate the real-world situation you intend to analyze.

2. Conceptualize in terms appropriate to a computer-based analytical approach.

3. Organize the logical approach to the analysis.

4. Implement the specific software steps.

Although many people conducting a GIS analysis tend to address the first three of these informally, taking the time to expand in some detail can greatly reduce missteps and dead ends as you carry out your analysis. In other words, taking a little extra time up front to plan the analysis process will yield benefits in the long run. We address each of these phases in the following sections.

Before you perform these four phases, keep in mind that, at this point, you are only considering the GIS aspects of the analysis. We assume that you have already determined the general nature of your study and that incorporating a spatial component through GIS will benefit your overall process.