[postgis-users] Distance between two furthest points of a group

[Jonathan Moules]

Hi List,
I have sets of points (up to 250,000 in a set) and I want to get the furthest distance between any of them.

In theory the simplest way is to use ST_MinimumBoundingCircle(ST_Collect(geography) and then get the diameter of that.

The problem is - I don't seem to be able to get the diameter of that circle (which would give me the distance I want).

Does anyone have any thoughts on this? Is there a good way to get the diameter? Or some other way of getting the distance I desire.

Thanks,
Jonathan

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