[postgis-users] Bug fix for transform() function

[Mark Cave-Ayland]

Hi everyone,

I have recently found a bug in postgis-0.7.1 to do with the transform()
function which causes the backend server process to die when the query
is executed! I was attempting to reproject a BOX3D object with the
following statement (running this on a production system is probably not
advised):

select transform(setSRID('BOX3D(-9.13027162006
45.0826338462,1.96043607225 56.1733415385)'::BOX3D,4318), 27700);

The reprojection causes the server process to die (and terminates both
the client and the server under cygwin). Looking at the source, I found
that the BOX3D geometry is not handled correctly and so I have modified
it to correctly handle the reprojection of the the BOX3D object.

I have enclosed my patch against 0.7.1 which I think gives the correct
response, although I would be grateful if someone could review it since
I'm not that familiar with the reprojection code. Hopefully it will help
other people experiencing the same problem.


Many thanks,

Mark.

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