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Introducing Geographic Information Systems with ArcGIS: A Workbook Approach to Learning GIS, 3rd Edition by Michael D. Kennedy

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Specifying Which Feature Moves When Features Are Adjusted: Rank
The process of generating and validating topology in geodatabases may result in moving some features. You have control over which features move. Each feature class is given a rank. The highest rank is 1; 2 would be a lower rank. When a feature must move to correct a topological error, the feature that moves is the one whose feature class has been assigned the lower rank. Let’s presume that the locations of the fire hydrants are highly accurate, but that the locations of the water lines are less well known. Therefore, we will give Fire_Hydrants a higher rank (lower number), so their coordinate representations will not change.
____ 6. Leave the number of possible ranks at 5. Change the rank of Water_Lines to 2. Leave the rank of Fire_Hydrants at 1. See Figure 4-24. Click Next.

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