So if you have Multiple Ring Buffer boundaries defined at say 20, 50, and 100 miles, which 'Ring' does a point at exactly 50 miles fall in? Are the boundaries inclusive or exclusive limits? I have scoured the internet for an answer and cannot find a single post that addresses this.

Thanks in advance for your comments.

most classifications schemes in mathematics (ie random number generation, statistics and in programming languages are.. up to, but not inclusive. I would suggest you check it, but that depends upon how the geometry is represented. A buffer of 1 meter around a point is represented by a n-gon (360 sides generally) so inclusion can fail even if an entity is within the bounds.

If this is a mission critical test, you would be advised to select within some tolerance, then fine-tune your selection with actual euclidean comparisons. (ie 1 +/- 0.001 m, then do the actual math.)