Visualizing Workflow when Analyzing
The problem with final map outputs is that there is little real understanding of how the results were obtained. Utilizing ArcDesktop and ModelBuilder, a client can request a visual workflow of tool and analyses used to obtain the results. In this example, a request is made to find a suitable location to reintroduce a species of Fern. This fern has a set criteria that needs to be met before it is introduced. In the Figure below, each criteria can be seen, as well as the direct workflow used to obtain the two final outputs. (Please click the image to view a larger version)
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| Figure 1 - Two different models being created in tandem, using set criteria. |
An MCE is essentially a weighted analysis. What this means is that certain percentages or scales can be applied to a critera, which later can be used to single out or form areas of high interest. In the example above, Finlay's Fern liked areas that were on a 45 to 55 degree slope. This slope category was then given a rating of (10) on a scale of 10. On the other hand, the fern did not thrive on slopes from 0 to 20 degree, and thus, a rating of 0 out of 10 was applied.
After all ratings were set, weightings could then be applied with the Raster Calculator. This calculator performs mathematics on a raster surface, and will generate a raster result. The weightings can be seen in figure 1, on the upper right hand side of the model. (Ex. if a weight is 0.46, it can be translated to 46%).