[postgis-users] Bounding Circle instead of Bounding Box

[postgis at jochem.name]

Hi,

what I want to do is finding certain features in some distance around a
certain point. Those features should be located in some corridor between X
and Y km around this point. Currently I've solved this problem by
computing two bounding boxes of X and Y km around the point and taking the
difference of those. So far so good.

But I don't want to have some quadratic box but a real circle - is there
any way to achieve this?

Best regards,
 Rainer