[postgis-users] Bounding Circle instead of Bounding Box

[Shane Spencer]

I don't understand how the Distance() and Intersects() and Contains()
function wouldn't work for this?

Are X and Y radius the same?

On 9/9/07, postgis at jochem.name <postgis at jochem.name> wrote:
>
> 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
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