What criteria must feature classes within a feature dataset meet?

Feature classes within a feature dataset must share the same coordinate system to ensure that all data can be accurately analyzed and displayed together. This consistency is crucial because differing coordinate systems can lead to misalignment of spatial features, resulting in errors during spatial analysis, mapping, or data visualization. When all feature classes in a dataset are aligned to the same coordinate system, operations such as overlay analysis, proximity analysis, and data integration can proceed smoothly, providing coherent and meaningful results.

This requirement enhances the interoperability of vector data within a geodatabase, making it easier to apply spatial queries and perform operations that assume a common reference frame. When feature classes operate under the same coordinate system, GIS applications can efficiently manage and analyze the data without needing to perform complex transformations or adjustments that might compromise data integrity and accuracy.