[postgis-users] Problem : Within() incorrectly returns 'false'

[Arnaud Lesauvage]

Martin Davis a écrit :
> I'm not sure about this one.  The test checks out fine in JTS. 

All my other tests run fine :
Distance() returns 0, Intersects returns true, both geometries are valid...
I don't know what to do next !

SELECT Intersects(pt,pg), Distance(pt,pg), Within(pt,pg), IsValid(pg), IsValid(pt)
FROM
(SELECT GeomFromText('POINT(455663 4973705)',32631) AS pt,
GeomFromText('POLYGON((455634.327007261 4973739.18140708,455640.390824553
4973742.34545851,455649.974963534 4973744.72838799,455655.302230411
4973744.81018619,455666.871609771 4973741.51734043,455673.066844244
4973737.99160574,455682.857256671 4973731.31013028,455696.77629443
4973721.97329467,455713.453957339 4973712.16884477,455721.42334697
4973707.86016838,455737.50239802 4973705.84732456,455748.289255495
4973707.80971155,455768.964516862 4973713.10563678,455789.467434074
4973718.30527948,455809.877573217 4973718.59365931,455816.032949075
4973711.16573985,455819.835126931 4973702.44653788,455824.05944495
4973691.47543162,455824.05944495 4973691.47543162,455828.610407021
4973680.12283995,455830.970634323 4973674.90248145,455833.367228335
4973670.30554483,455838.223766503 4973663.87857158,455853.056176824
4973662.3695754,455866.6601998 4973666.33738459,455872.247284383
4973667.83016243,455891.21742699 4973672.66515592,455904.87965274
4973676.20206359,455925.323306466 4973681.93577574,455931.93236638
4973683.83511874,455963.188375863 4973690.90230387,455986.900652308
4973690.57770489,455999.308881106 4973688.08608035,456006.847072463
4973685.91128035,456013.781894891 4973682.68047389,456020.04917607
4973677.53977996,456028.058802994 4973664.42994524,456032.395247822
4973652.08166202,456034.250253643 4973645.32660031,456037.315382866
4973631.6242598,456038.518126576 4973625.06483024,456039.49606989
4973618.95846064,456041.143946469 4973604.12669801,456041.322480722
4973600.16812515,456041.234269879 4973593.33220285,456040.255579245
4973584.79199929,456038.077220394 4973576.88018093,456031.407673379
4973564.92278014,456022.584091079 4973553.60498374,456015.530632601
4973545.35673604,456011.870844281 4973541.1846865,456001.221309389
4973529.12192161,455991.929965679 4973518.46446974,455982.111242839
4973507.13762537,455975.429739526 4973499.25369943,455968.699421007
4973481.2156405,455968.569127113 4973472.22440673,455968.681690362
4973469.48222644,455968.364280116 4973459.20668792,455964.198441514
4973452.80965392,455957.352768727 4973451.16429375,455950.970005851
4973451.05854393,455925.042572423 4973453.79303565,455920.580033511
4973454.95190268,455916.338152812 4973456.411639,455908.870067239
4973460.36365329,455899.377173016 4973468.20421239,455892.64054911
4973473.70250239,455884.308266302 4973478.59803378,455873.700962084
4973482.45761784,455861.855176683
4973485.90236361,455859.696574931 4973492.55059044,455844.389439454
4973492.39432963,455839.411700775 4973495.34512154,455831.33685203
4973502.9194365,455825.191393046 4973512.52991105,455822.579473065
4973518.00029755,455817.751828832 4973530.0745478,455812.814767254
4973543.24550764,455807.105870701 4973557.06881857,455803.959640509
4973563.64623146,455796.916583005 4973575.41517021,455792.972660989
4973580.26754987,455786.234602819 4973585.77560012,455773.906298319
4973590.19110681,455755.880529301 4973589.95244674,455741.983929337
4973588.07856712,455734.473975748 4973587.00298353,455726.703007087
4973585.92187192,455710.902303958 4973583.8726695,455695.630378757
4973582.19016965,455688.520382506 4973581.56743626,455675.978583625
4973580.92133312,455661.611205371 4973581.95574872,455651.587526438
4973586.21821552,455646.738207892 4973591.31382874,455642.936132872
4973598.59694555,455639.807137755 4973608.4661572,455638.377942947
4973614.49593153,455636.97649546 4973621.32268911,455634.084325749
4973637.51733042,455631.585960851 4973653.17474669,455630.344123986
4973661.50140289,455629.696234567 4973665.93866226,455629.696234567
4973665.93866226,455628.383269606 4973675.5239203,455626.235378731
4973693.34686891,455624.997527166 4973707.75141773,455625.052806357
4973722.19487999,455626.239816571 4973728.34327406,455630.963831745
4973736.33081102,455634.327007261 4973739.18140708))',32631) AS pg)
AS sq;

  intersects | distance | within | isvalid | isvalid
------------+----------+--------+---------+---------
  t          |        0 | f      | t       | t
(1 row)

!!!

--
Arnaud