[postgis-devel] bug in simplify a polygon

[strk at refractions.net]

My brain faulted trying to read the message...
can you provide a simpler example ?
--strk;

On Sat, Sep 18, 2004 at 12:48:36PM +0800, Fu Chen wrote:
> Hi!
> I find there must be some bugs in the function to simplify a polygon. some polygon get weird result after simplify.
> here is the example
> 
> the source:
> 
> SRID=-1;MULTIPOLYGON(((111.269523620605 30.0150585174561,111.288230895996 30.0127201080322,111.293571472168 29.9903964996338,111.316711425781 29.9730815887451,111.32396697998 29.9791641235352,111.337692260742 29.9541893005371,111.345428466797 29.9455871582031,111.371238708496 29.9550533294678,111.386726379395 29.9146823883057,111.40731048584 29.9150485992432,111.433601379395 29.9341297149658,111.444023132324 29.9282321929932,111.519607543945 29.9297733306885,111.53343963623 29.8999538421631,111.563743591309 29.8980693817139,111.693710327148 29.8899898529053,111.741439819336 29.920560836792,111.754547119141 29.9107666015625,111.791969299316 29.9089298248291,111.801872253418 29.894063949585,111.894577026367 29.8585758209229,111.930633544922 29.835620880127,111.954460144043 29.8392791748047,111.948577880859 29.807279586792,112.037857055664 29.7575340270996,112.060501098633 29.7476615905762,112.049507141113 29.7687644958496,112.05859375 29.7731666564941,112.072311401367 29.7440567016602,112.05859375 29.6876659393311,112.095657348633 29.6770248413086,112.126190185547 29.6595687866211,112.174980163574 29.662654876709,112.191352844238 29.629035949707,112.239288330078 29.664514541626,112.238906860352 29.6608505249023,112.235939025879 29.6184959411621,112.291580200195 29.5968437194824,112.297546386719 29.585470199585,112.290412902832 29.5500755310059,112.272499084473 29.5234069824219,112.282257080078 29.4988746643066,112.286163330078 29.510856628418,112.315818786621 29.5215167999268,112.322219848633 29.5462894439697,112.35986328125 29.5390071868896,112.380210876465 29.5506954193115,112.419738769531 29.6030006408691,112.42317199707 29.6281547546387,112.443138122559 29.6352577209473,112.485458374023 29.6335601806641,112.499603271484 29.6150970458984,112.530487060547 29.6026496887207,112.56413269043 29.6247692108154,112.601623535156 29.6128311157227,112.625671386719 29.6161327362061,112.640632629395 29.5918960571289,112.66227722168 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30.1167144775391,110.820266723633 30.1280059814453,110.91813659668 30.1144886016846,110.923683166504 30.0674057006836,111.24471282959 30.0433864593506,111.269523620605 30.0150585174561),(109.537452697754 26.7500324249268,109.538078308105 26.7270469665527,109.558242797852 26.7242679595947,109.580940246582 26.7345542907715,109.585716247559 26.7597694396973,109.571006774902 26.7673091888428,109.537452697754 26.7500324249268)))
> 
> ============================================================================================================
> 
> after simplify(the_geom,0.01) the result is:
> 
> 
> 
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> 
> any idea?
> 

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