ERR"reason"Unable to Tessellate shape Possible malformed shape detected

Elastic Stack Elasticsearch
1

I want to know why it failed, because of accuracy?Why does this polygon be judged as a self -intersecting graph, which causes storage

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2

Hi @baiwenbo1997,

Welcome to the community. I have a look into the issue and it seems you are hitting a bug that has been fixed in the latest Elasticsearch release (Elasticsearch 8.3.x). More specific, this was a Lucene bug: [LUCENE-10470] Unable to Tessellate polygon - ASF JIRA

You need to upgrade to the latest release to get the fix. Note that the bug is still present in 7.17.x and it will get fixed in the next release (Port fixed version of Lucene Tessellator into ES 7.17 by craigtaverner · Pull Request #88213 · elastic/elasticsearch · GitHub).

Thanks,

Ignacio

3

Thank you for your reply, the last face storage failed because of the version problem, I have updated the version to 8.3.2, this single face cannot be stored

ERR：Unable to Tessellate shape. Possible malformed shape detected

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3328377.000700001,38624755.2263 3328383.8201,38624755.3363 3328383.962099999,38624761.3893 3328392.5371,38624761.4875 3328392.6905,38624761.5205 3328392.7499,38624766.6359 3328402.3497,38624769.8082 3328408.5644,38624770.367 3328410.0527,38624771.1479 3328412.1325,38624772.903 3328416.8072,38624774.4373 3328421.978499999,38624774.4811 3328422.155300001,38624775.7141 3328428.3203,38624775.7255 3328428.3813,38624776.8177 3328435.226,38624777.9825 3328438.9136,38624780.764 3328443.8258,38624781.5695 3328445.0452,38624787.7396 3328453.622,38624788.0854 3328454.102700001,38624794.7005 3328463.3167,38624804.4805 3328473.7675,38624811.1383 3328478.350500001,38624812.208 3328479.016100001,38624813.4979 3328479.818700001,38624818.3721 3328481.095100001,38624823.7303 3328481.757300001,38624829.3935 3328481.757300001,38624832.6855 3328481.295299999,38624840.1289 3328478.957699999,38624851.8321 3328474.889699999,38624854.6451 3328473.7106,38624862.2915 3328470.5055,38624866.2405 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3328499.1405,38624922.0129 3328496.3879,38624921.9059 3328496.329700001,38624901.5127 3328484.3015,38624879.9649 3328473.371099999,38624873.9813 3328471.9583,38624869.4643 3328472.140699999,38624866.5935 3328472.978499999,38624863.8677 3328474.1819,38624856.1844 3328477.4024,38624853.3205 3328478.6029,38624853.2179 3328478.6427,38624841.4133 3328482.746099999,38624841.3559 3328482.7651,38624833.7265 3328485.1609,38624833.4745 3328485.2225,38624833.4053 3328485.2335,38624829.8113 3328485.7379,38624829.5333 3328485.757300001,38624823.6063 3328485.757300001,38624823.3611 3328485.7421,38624817.7495 3328485.0485,38624817.6475 3328485.033299999,38624817.4881 3328484.998500001,38624814.1858 3328484.1336,38624812.1917 3328483.611300001,38624812.0143 3328483.5559,38624811.6983 3328483.4087,38624811.6417 3328483.374700001,38624810.9431 3328482.939999999,38624803.1297 3328478.078299999,38624802.9007 3328477.9123,38624802.7259 3328477.7467,38624800.0519 3328474.8893,38624791.6919 3328465.9559,38624791.6201 3328465.8749,38624791.5275 3328465.7557,38624784.4657 3328455.9197,38624784.4137 3328455.843699999,38624782.814 3328453.384400001,38624777.4361 3328446.122400001,38624776.449 3328444.831599999,38624773.5561 3328439.1503,38624773.1881 3328437.863600001,38624771.7835 3328429.0623,38624770.5771 3328423.0307,38624769.2615 3328418.5966,38624767.3309 3328413.375,38624766.1699 3328410.2349,38624764.8955 3328407.7381,38624763.0935 3328404.2075,38624758.0489 3328394.7411,38624752.1227 3328386.345699999,38624746.3849 3328379.682700001,38624740.0833 3328373.6373,38624726.7092 3328364.535700001,38624715.9209 3328357.956900001,38624704.1362 3328352.548800001,38624703.9873 3328352.444499999,38624703.0311 3328351.6413,38624701.048 3328349.975500001,38624700.2686 3328349.320699999,38624698.3983 3328347.749700001,38624690.9751 3328341.7457,38624688.7926 3328340.7139,38624684.1185 3328338.872500001,38624677.8769 3328337.188300001,38624659.3015 3328334.9637,38624659.2425 3328334.955700001,38624645.7915 3328332.938100001,38624645.6945 3328332.9211,38624643.9459 3328332.5701,38624613.3619 3328326.4323,38624593.6945 3328323.7501,38624593.5939 3328323.7337,38624579.4385 3328320.8859,38624556.3143 3328316.2333,38624531.9253 3328313.1149,38624507.1987 3328312.1799,38624506.0403 3328312.1362,38624504.0437 3328311.814099999,38624502.3835 3328311.188100001,38624501.2381 3328310.110099999))
4

In this case the polygon fails because Cartesian shapes work on float precision and with that precision this polygon is considered self-intersecting:

Polygon self-intersection at lat=3328545.1875 lon=3.8625012E7
5

As you said, the polygon is judged to be self-intersection due to the precision, so when storing the polygon, determine what the precision range of the self-intersection is or whether there is a solution to the failure of polygon storage due to the precision problem

6

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