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List:       postgis-devel
Subject:    [postgis-devel] Re: Difference bug (was: Postgis)
From:       strk () refractions ! net
Date:       2005-07-25 17:44:21
Message-ID: 20050725174421.GA31018 () keybit ! net
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On Mon, Jul 25, 2005 at 08:47:12AM -0700, Martin Davis wrote:
> Almost certainly.  I can't read the hex, so I can't comment on why this
> might be occuring.  Can you post the WKT?

Sure, but transforming this to WKT reduces precision,
enough to pass the test:

select astext(difference(
astext('01030000000100000009000000215DE2E756673A419CB1D50C8868524179A3C8DF59673A410B9E \
DB5D876852419D13A3314B673A4173AB24F282685241239C6DD83A673A41ECC950DC80685241CC46FE2A2F \
673A414B3B231C80685241E74CB0C52D673A41EFB7A7E0806852417B14AE473B673A416766661683685241D7A370BD53673A4185EB518887685241215DE2E756673A419CB1D50C88685241'),
 astext('01030000000100000005000000B87B621331673A4136EA036B81685241B90E118236673A41D91 \
150717F6852415F2CA05B2E673A41A160D97B7E685241C3F528DC29673A41CDCCCC3C80685241B87B621331673A4136EA036B81685241')
 ));

 POLYGON((1730390.90579779 4825632.20054283,1730393.87415525 \
4825629.46652938,1730379.1938946 4825611.78348814,1730362.84542251 \
4825603.44243095,1730355.84602248 4825601.64258523,1730353.07572149 \
4825605.67211395,1730363.28 4825612.35,1730387.74 4825630.13,1730390.90579779 \
4825632.20054283))

... these are the input WKT ...

 POLYGON((1730390.90579779 4825632.20054283,1730393.87415525 \
4825629.46652938,1730379.1938946 4825611.78348814,1730362.84542251 \
4825603.44243095,1730351.16794245 4825600.43965037,1730349.77222138 \
4825603.51023672,1730363.28 4825612.35,1730387.74 4825630.13,1730390.90579779 \
4825632.20054283))

 POLYGON((1730353.07572149 4825605.67211395,1730358.50807278 \
4825597.77051207,1730350.3579128 4825593.93514267,1730345.86 \
4825600.95,1730353.07572149 4825605.67211395))

--strk;


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