Hello, I wanted to share something else I learned in my proximity search work. One my requirements is to order by the distance that matches are found from the center point. When did this using earth_distance(), the benefit of the earth_box() technique over the old geo_distance became minimal as I approached a 250mi radius. Switching to sorting by cube_distance() offered a huge benefit, allowing the earth_distance() query to run in about 100ms vs 300ms for the geo_distance() equivalent. I checked the results that cube_distance() produced versus earth_distance(). cube_distance() is always (not surprisingly) a little smaller, but the difference seems only grows to about a mile for a 250 mile radius. That's an acceptable margin of error for this application, and may be for others as well. Mark
