[postgis-users] where 2.98023223876953e-08 comes from ?

[karpi.lists at email.cz]

Hello postgisers,

I'm fighting with points lying (more exactly not lying) on lines. There is some entities imported from cad project, which makes microscopic slivers and gaps.. But only two kinds of area appeas:

Zero areas like this:
'01030000201108000001000000040000009A9999992FF924C17B14AE47782930C114AE476118F924C1AE47E17A6C2930C1E12088471CF924C188962C766E2930C19A9999992FF924C17B14AE47782930C1'

and not zero areas like this:
'0103000020110800000100000004000000E17A14AE84FA24C1B81E85EBE32830C148E17A149DFA24C17B14AE47ED2830C1B46E579F88FA24C15DE9AD6EE52830C1E17A14AE84FA24C1B81E85EBE32830C1'

The not zero area is in most of cases exactly 2.98023223876953e-08. Why right this number? Do you someone know why just this area? I'm only curious..

                                                               thx, pk