Opened 2 years ago
Closed 21 months ago
#5225 closed defect (duplicate)
ST_SIMPLIFYPRESERVETOPOLOGY instability on some MULTILINESTRING
Reported by: | cactusbone | Owned by: | pramsey |
---|---|---|---|
Priority: | low | Milestone: | PostGIS GEOS |
Component: | postgis | Version: | 3.2.x |
Keywords: | Cc: | cactusbone |
Description (last modified by )
I have a question.
It seems ST_SIMPLIFYPRESERVETOPOLOGY (from postgis, which documentation says it is performed by the geos module) sends varying data with some MULTILINESTRING inputs
It also seems that the longer the MULTILINESTRING, the greater the chance of variation.
My question: is this a bug or something to be expected ?
example SQL : (run a few times, check that diff is sometimes not empty)
SELECT ST_ASTEXT(A), a, ST_ASTEXT(ST_DIFFERENCE(A,A)) AS DIFF FROM ( SELECT ST_SIMPLIFYPRESERVETOPOLOGY(WAY,1222) AS A FROM (SELECT ST_GEOMFROMTEXT( 'MULTILINESTRING((194310.3864375258 6269374.922168917,194229.76886229333 6269419.62067134,194119.46237886624 6269472.9675241215,194042.57400657536 6269505.525209331,193958.79495780432 6269533.572399087,193858.273457618 6269561.687510971,193767.74844770491 6269582.053220367,193573.44027652525 6269621.462109578,193479.14153587425 6269645.72817361,193389.2065192624 6269674.369340893,193292.52554150842 6269711.7098361235,193217.87469098245 6269746.35423054,193155.7695470689 6269778.590772032,193093.35270858108 6269814.473358343,193040.4759504543 6269849.186005235,192970.65636582876 6269900.4158241125,192894.84779259854 6269962.719570645,192836.52751137194 6270015.289773788,192778.54118861773 6270073.778748463,192625.0316108138 6270239.666467283,192568.5592331344 6270298.716632978,192512.55439731627 6270357.292362772,192453.93355346454 6270412.985471226,192393.4425421675 6270465.931574068,192347.57891196062 6270503.173810453,192301.4481149759 6270537.770570481,192237.51733141334 6270581.932522803,192171.7275123545 6270622.940256508,192058.01465250918 6270680.941609077,191985.70151128987 6270713.673542163,191909.31407670752 6270741.572103306,191822.22883905994 6270769.640353469,191449.74269091658 6270869.872750556,191380.12348137447 6270888.596497581,191124.12204839717 6270957.488032467,190824.78393765405 6271035.233363513,190464.67651688692 6271132.212507669,189704.9321241719 6271338.029749751,189668.1076366175 6271348.087531609,189348.69862168434 6271433.655485189,189138.50515916848 6271492.849680412,188856.3881736511 6271578.910977546,188790.843257472 6271599.11193322,188320.0842628563 6271744.641655042,187820.53804792152 6271896.195374541,187692.69874469453 6271935.632014541,187619.1610890765 6271957.055092225,187607.1385840708 6271960.379660216,187539.91274358073 6271978.970125731,187150.99583859628 6272106.017375912,187088.7459793447 6272125.86338048,186794.37271789095 6272204.755950004,186715.3581433259 6272226.9430276,186386.019429814 6272324.902724626,186341.98143925617 6272338.33728588,186228.48008644333 6272372.704076362,186148.8198588317 6272397.130705383,185908.72598108876 6272470.3262004275,184829.45012200074 6272795.583095043,184445.90994842158 6272911.174952552,184084.39990207044 6273020.101453073,183928.0962050476 6273064.4969112985,182967.9099372102 6273321.187642189,182437.8733137471 6273462.573600028,182195.7756851699 6273527.329633407,181451.6494170132 6273725.926944476,181349.51378421034 6273753.394341246,180894.95177550512 6273876.39644083,180646.27516502203 6273951.606744456,180527.5417961419 6273987.405251751,180453.04679290304 6274011.0052037,180394.06972668075 6274031.602196206,180335.10379240758 6274053.403845108,180288.73922449216 6274073.542850133,180239.85883608487 6274096.091127523,180172.97808601626 6274130.278434857,180095.22142169712 6274176.291545229,180053.242841719 6274204.93110029,180002.03587595408 6274241.205747136,179936.64680706212 6274291.97015417,179876.75692101536 6274344.431552935,179788.01302295495 6274433.304484509,179730.2493391823 6274498.560004091,179617.97250076823 6274621.352372588,179525.2990246828 6274717.490354004,179439.85018354992 6274796.916150924,179358.47563578002 6274869.0125483805,179299.48743760868 6274917.065843037,178963.19125592217 6275182.958891726,178872.84435719438 6275259.249852135,178787.77400233014 6275335.965722783,178712.68900579007 6275410.527225275,178494.07978977027 6275641.953757119,177877.44773441908 6276298.935552551,177659.651150682 6276529.351169971,177237.7168847283 6276979.118426997,176836.78860668722 6277406.437319403,176724.22233759708 6277523.229470048,176645.04078379582 6277599.507615941,176614.50584747124 6277629.007448478,176501.08241830196 6277727.538993572,176424.34989329817 6277788.915985597,176350.85676547643 6277843.928209411,176274.5249906395 6277897.243390758,176156.33708726428 6277973.049636971,176064.33152812364 6278026.925783878,175960.02516525035 6278082.7034044145,175832.28604956504 6278145.356064293,175696.1868401212 6278204.512415867,175593.32763062822 6278243.808757859,175473.42540709476 6278283.529652145,175334.88830080253 6278323.9127527755,175224.9714355933 6278350.359629461,175125.2736996388 6278371.238801115,175012.75195834498 6278390.997674488,174923.1286363073 6278402.914130773,174785.29284280707 6278416.494158423,174676.0216306444 6278421.977100771,174100.86721756277 6278440.191358953,173698.97045995184 6278452.939665534,173540.2399980297 6278455.129456483,173327.2190204477 6278456.521416915,173064.77218895347 6278454.569277345,172730.62447343933 6278444.333283348,172564.44673758312 6278438.375023896,172464.9493767121 6278432.926021066,172257.23833884092 6278419.142266356,172119.8255594057 6278408.668664824,171877.5052918469 6278387.432925874,171702.3329411346 6278369.490380695,171082.127530129 6278305.138576055,170505.1140815511 6278245.047911142,170402.29939985444 6278235.083765929,170292.12649981634 6278227.3433137005,170194.47704249248 6278221.521004526,170041.15670782293 6278214.340727894,169855.24202624903 6278210.2498401515,169705.57297087752 6278210.131017717,169622.81806142177 6278211.387140695,169526.35972264942 6278213.848463291,169378.70555006122 6278219.6028685635,169239.1331725046 6278228.310869838,169075.88313925627 6278241.890616841,168886.91830363468 6278260.9871729845,168734.08777472458 6278281.526628219,168578.49652244285 6278304.18798594,168370.69642897905 6278340.038887247,168134.54326121017 6278389.571774863,168031.3500932448 6278412.437122872,167946.24634253338 6278433.265522698,167775.02583374424 6278477.027397188,167221.3672143348 6278632.35162899,166564.38184357106 6278819.168873168,166459.41869570207 6278848.757844283,166041.4919314169 6278967.029884336,165837.27632555665 6279028.602620861,165678.90208600505 6279078.563955241,165512.601898709 6279134.518284295,165331.74112201715 6279198.536874455,165093.95155773364 6279292.927407073,164927.9074052664 6279363.551229157,164822.33200019805 6279410.390767568,164716.75659512973 6279459.743182722,164550.01112987046 6279542.473213391,164382.6311435137 6279628.973055033,164171.31335414085 6279747.323929873,163970.61544418964 6279867.83266412,163782.9196507631 6279988.529877836,163630.74590684866 6280090.722325979,163479.24007987903 6280199.5886100065,163379.94309409146 6280273.819513355,163247.127809626 6280378.001954607,163115.57043540652 6280484.698602745,163059.6880510283 6280531.968840754,162875.54334935802 6280694.275525646,162783.88288063885 6280779.377839527,162689.60640388602 6280869.388223054,162596.5767054301 6280961.284363624,162447.34179607264 6281113.020460335,162357.3288558172 6281210.998327417,162269.20834690524 6281309.588642108,162101.57232571964 6281505.567054671,162010.35713496362 6281621.668706291,161854.3873964132 6281821.407357725,161723.431147444 6281998.836028648,161601.6030967198 6282162.155893708,161215.4580470561 6282692.4535129145,161104.21647990638 6282844.135795295,160829.9141226427 6283218.198562569,160702.65368076783 6283385.584448484,160574.558342712 6283548.625397618,160460.78982312127 6283687.600801415,160371.35574421793 6283794.543099508,160231.61638742514 6283954.27963882,160087.1570842227 6284113.3397397725,159955.12103619284 6284254.006129454,159817.01807591468 6284395.35434521,159744.50455961193 6284466.955143437,159590.92819011354 6284616.189126318,159504.75577229046 6284696.999112322,159389.42877982865 6284802.459260868,159281.02585969414 6284898.169562886,159107.41198185296 6285047.326225455,158927.04101092063 6285194.650745688,158757.7018015259 6285325.923272096),(159612.02323361888 6284563.8677484,159743.35796885678 6284436.870843225,159804.50576514952 6284376.057057197,159943.10966313622 6284232.942543113,160062.97849082242 6284104.710601479,160212.85905322648 6283940.435912305,160278.87151126692 6283866.104831385,160358.70985006384 6283774.160091971,160552.72859056742 6283538.077492254,160684.97614562983 6283370.620643681,160811.55753861085 6283201.910250149,161138.15779264923 6282756.753832039,161584.226124207 6282147.686750394,161704.9855078195 6281984.995507281,161836.4315625482 6281805.648176685,161986.86872240627 6281612.872298865,162079.47540679717 6281496.176424808,162250.50667245197 6281295.324729303,162338.95000788724 6281195.4440528685,162430.53255296283 6281096.515461827,162580.01236520006 6280943.94763531,162596.9329278006 6280927.239206045,162672.95300806337 6280852.187522901,162769.03286056704 6280761.03967867,162860.51521810095 6280675.92056996,163020.51472221813 6280534.855322192,163099.85212330648 6280467.05722754,163230.44101795607 6280360.683402378,163363.5346011485 6280256.823770906,163467.76304037822 6280179.112405164,163648.79079630628 6280051.332500253,163770.30715245623 6279968.682376769,163963.03458686662 6279844.963376556,164159.33537693147 6279726.662066799,164358.04066799747 6279615.085483966,164543.98874541855 6279518.976647851,164709.18686975574 6279437.961534301,164812.15739873954 6279390.289969728,164916.3747060202 6279343.246819833,165085.1461860119 6279271.332933188,165186.24654755034 6279231.420650729,165324.78365384255 6279176.721946358,165504.15274935775 6279112.499804153,165669.88520725077 6279057.46234304,166039.34346524457 6278943.365158198,166557.42437539648 6278795.793149981,166583.84049056174 6278788.238917756,167189.73021505136 6278618.109211654,167769.8717413205 6278455.129456483,167928.78031442792 6278413.489575424,168027.06429284927 6278389.860349767,168103.07324116293 6278372.376123329,168372.9228187949 6278316.477766411,168581.99195445376 6278280.134696615,168742.52579212672 6278256.30214721,168872.51356152602 6278239.7348305425,169075.40446544587 6278218.839009227,169235.6711363409 6278205.5648425175,169378.816869552 6278196.09300741,169525.63614595926 6278190.508364088,169700.730573028 6278186.570259162,169851.34584407127 6278186.315640371,170044.14007017616 6278190.372567335,170194.27666740905 6278198.07903647,170293.64044489112 6278203.986202594,170401.4199758772 6278212.354695007,170499.50357921512 6278220.723195708,171085.58956629265 6278281.98494721,171705.6279980621 6278347.032546713,171877.6166113377 6278364.924119366,172140.3417415589 6278387.178301031,172250.04709973568 6278395.292349814,172467.320481866 6278410.0096924985,172565.3706893567 6278415.8321315665,172732.4612450374 6278421.960125714,172873.4807759743 6278427.290295983,173072.53115746178 6278431.551039599,173317.93497491552 6278433.367373186,173696.47690335807 6278430.8211112525,174099.07497376102 6278417.376860977,174673.76184498132 6278398.178101262,174785.28171085802 6278392.304749357,174919.56641260194 6278379.845108834,174999.9724808019 6278368.6416330505,175050.34455038584 6278360.748284028,175121.71147593344 6278348.424489337,175222.12165662897 6278327.290751028,175329.82326397148 6278301.030669535,175465.9781331607 6278262.582798295,175584.2884879758 6278220.960840882,175688.11617703867 6278181.596706854,175823.68105292672 6278123.068570675,175954.45919071068 6278060.959254745,176051.79695346032 6278008.423854744,176149.13471620996 6277951.679200016,176247.7081253074 6277886.770436193,176332.1439590741 6277828.889349307,176413.15115252437 6277768.157069202,176490.89668489437 6277706.525623646,176554.3265307484 6277652.481784668,176627.05155408365 6277584.842605183,176657.0632888015 6277557.413671906,176711.01984598898 6277504.507992098,176760.8241861699 6277453.130223573,176820.9701070455 6277390.431777683,177286.2855785614 6276892.20443966,177861.65149867552 6276284.154003537,178398.8570973457 6275710.3070790805,178695.34542912449 6275395.866013061,178775.66244173184 6275316.536399705,178858.2392400023 6275241.313948316,178944.2780744364 6275168.569570697,179282.555743059 6274899.63970496,179341.2990383506 6274851.1623121975,179428.87408175768 6274776.724518886,179508.23374674423 6274703.390274527,179556.8135725264 6274653.3699657265,179603.24493213627 6274605.046692117,179711.58106057628 6274482.339396265,179772.46169009112 6274415.709673763,179860.53767120678 6274326.463656855,179922.175273259 6274271.881528828,179987.39736291478 6274218.419549947,180033.8621183719 6274184.910548036,180080.6942281486 6274154.099350101,180113.37763064553 6274134.21464984,180161.62349795533 6274106.525452321,180227.2797336252 6274070.115652964,180274.1897670455 6274047.771040161,180324.66202417118 6274025.0023307055,180385.19756326458 6274002.216716409,180442.14861475438 6273980.992048297,180512.50253293573 6273958.885196452,180622.23015501068 6273925.954068508,180758.819170214 6273887.695757958,181342.9348023045 6273730.813046822,181445.46005332508 6273703.7698630225,182199.37130472253 6273502.49257374,182963.31244224045 6273298.794114928,183938.78287616375 6273037.642466021,184079.81353904973 6272997.267655166,184238.04306326332 6272948.394035007,184438.81889685805 6272888.1548454845,185007.9731893859 6272716.159139401,185901.1673876639 6272446.119879661,185976.12993276407 6272423.898300745,186121.39073630024 6272380.829315267,186199.8821092586 6272357.556209243,186287.8356389343 6272331.484299947,186334.95717938713 6272317.506939917,186380.0304412093 6272304.157225641,186534.40831104142 6272258.391783233,187140.94368857768 6272080.624735446,187160.71403014255 6272073.754996126,187539.9238755298 6271955.324960422,187600.55960216493 6271936.378344127,187674.38668845902 6271913.293043615,188332.00658032027 6271715.4507022835,188782.3273164263 6271579.470701108,188845.1115092337 6271560.0669725705,189141.16569499843 6271470.308346317,189362.03469668137 6271405.008357309,189660.70489047974 6271327.564920277,189695.74826618144 6271318.185594663,190457.64112506877 6271112.86068684,190816.96930940036 6271015.305118234,190957.20960390175 6270978.976471972,191363.30310631558 6270868.855156802,191382.17176000506 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6263822.32685951,218705.75228224657 6263893.838307869,218520.03797575616 6263979.347814357,218490.1486924782 6263994.362057897,218408.25094310154 6264037.557812361,218325.8745199145 6264082.9229123965,218244.90072231152 6264132.050353388,218053.4089342489 6264260.657482187,217837.0038441468 6264442.852849489,217784.0825582237 6264493.355096953,217728.20017384543 6264546.501411833,217658.1579502383 6264620.205192584,217541.57304753052 6264753.565079774,217384.59030161385 6264956.820506265,217233.96389862147 6265182.18162379,217114.51808500028 6265370.05776213,217054.32763632835 6265464.734680305,216838.23424080043 6265799.298788547,216701.3669268701 6265999.426621184,216479.58510536267 6266315.416871801,216294.72795895135 6266564.749343449,216136.38711524702 6266765.352984541,215902.29335805785 6267053.485366645,215235.44508040982 6267830.493258173,214892.12463885426 6268223.8306030845,214377.20520224093 6268825.044789955,214251.2694623065 6268952.722895732,214128.18350133637 6269077.791658462,214009.2608893219 6269184.023561346,213892.23070865095 6269278.014049706,213843.42824388717 6269314.742350535,213670.8273734122 6269430.0661824485,213462.23691156376 6269544.865912889,213305.5324643741 6269618.477608959,213177.59297360538 6269668.671623153,212927.60279313088 6269747.659969178,212654.14646399723 6269802.8233715175,212483.09293444428 6269824.614116857,212408.41982002018 6269831.159830317,212191.34681297326 6269838.383861936,211998.31881593776 6269841.673681193,211873.9415488744 6269845.557026199,210892.30401516115 6269862.04006501,210446.35813504332 6269870.315512252,209374.51841794027 6269887.171673696,209190.60748720073 6269888.273938942,208845.5170657416 6269873.89362822,208584.40606813686 6269851.678809498,208322.51583409662 6269819.798102936,208119.68058992218 6269787.374869348,207838.4764242293 6269733.17815191,207666.2651719721 6269693.32784602,207500.0763041668 6269651.188471549,207094.13864904008 6269527.942605048,207010.21488493102 6269499.573248141,206915.03672030274 6269469.050436069,206405.47175119657 6269260.463879191,205872.1289388569 6269025.413802074,205509.60588513955 6268865.823577013,205338.81952236447 6268798.356409601,205229.83774087788 6268760.79952401,205129.21605314984 6268728.482084657,205004.1708691418 6268697.33470097,204937.22332737868 6268683.159881713,204672.08256420726 6268635.854137745,204370.6739109354 6268613.6256161155,204261.52515021258 6268613.47301777,204135.43356299106 6268617.254066456,203986.54374405506 6268624.867035082,203844.71158083534 6268640.4999231035,203624.3657807591 6268684.635011318,203495.53573406406 6268709.915720742,203397.38533903164 6268732.63620819,203350.37511806964 6268743.369116401,202970.9426337008 6268826.943839294,202600.93891020207 6268911.401098567,202196.83802667345 6268999.894763305,202016.15536116686 6269030.53457528,201871.68492601535 6269047.066894041,201731.35557592136 6269057.528901179,201616.9970630294 6269060.801460366,201488.60116234847 6269057.8171576345,201368.87705000027 6269051.84855534,201231.82049293566 6269038.114003561,201055.81324604238 6269011.509731532,200931.7922013496 6268991.348869861,200526.58925486208 6268901.057963869,200204.19687757565 6268843.136643355,199764.70752792383 6268786.250018328,199346.39114542087 6268756.679297957,198995.5343743386 6268745.810727753,198173.98540033516 6268752.711674767,197670.8101700005 6268765.411466662,197477.55953398338 6268779.162531202,197360.328978229 6268791.52324825,197084.12305767272 6268832.776636343,196819.97303796935 6268881.422998699,196631.9766819177 6268913.673198705))' ) as way ) as t ) as t
result (screen from pgAdmin) ![image](https://user-images.githubusercontent.com/1227612/186465718-4fb611c1-aa63-408a-92dd-3119f144aefb.png)
Version: POSTGIS="3.2.2 628da50" [EXTENSION] PGSQL="140" GEOS="3.9.0-CAPI-1.16.2" PROJ="7.2.1" GDAL="GDAL 3.2.2, released 2021/03/05" LIBXML="2.9.10" LIBJSON="0.15" LIBPROTOBUF="1.3.3" WAGYU="0.5.0 (Internal)" TOPOLOGY RASTER
(not sur if this should be here or on geos side, so I opened both https://github.com/libgeos/geos/issues/667)
Change History (3)
comment:1 by , 2 years ago
Description: | modified (diff) |
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comment:2 by , 22 months ago
comment:3 by , 21 months ago
Resolution: | → duplicate |
---|---|
Status: | new → closed |
Handled in https://github.com/libgeos/geos/issues/667 where it's been fixed.
This is a GEOS/JTS bug. It's been fixed in all GEOS versions back to 3.9.