Hi Debasish,
this could happen in case the 2 polygons are not intersecting.
I guess that using the "JTS:intersection" process will return an empty
geometry collection whilst trying the "JTS:intersects" will return false.
In that case, the result of the union will be 2 different polygons => A
multipolygon.
Please, let us know.
Regards,
Daniele
On Wed, Apr 6, 2011 at 2:35 PM, Debasish Sahu <debasish.s...@gmail.com>wrote:
> Hi,
>
> I was trying to union two geometries using the given request below , but
> the response from GeoServer seems to return me a Multipolyon with the same
> two input geometries rather than the union geometry. Can you please provide
> me some pointers on the issue ?
>
> *Response:*
> *
> *
> *MULTIPOLYGON (((258704.0312 331796.18740000017, 258697.20299999975
> 331788.09369999915, 258694.95309999958 331785.65619999915, 258685.3125
> 331775.28130000085, 258676 331765.3125, 258672.29690000042
> 331761.31240000017, 258652.9062 331741.49990000017, 258652.375
> 331740.96869999915, 258649.29690000042 331743.18740000017,
> 258648.29690000042 331744.5, 258647.20309999958 331745.5939000007,
> 258646.29679999966 331746.40630000085, 258643.6563 331748.18740000017,
> 258633.5 331754.8125, 258633 331755.09369999915, 258623.0938
> 331761.09369999915, 258615.5937 331765.18759999983, 258611.70299999975
> 331767.31240000017, 258601.99990000017 331772.31240000017,
> 258597.50009999983 331774.09380000085, 258593.00009999983 331775.8125,
> 258588.17190000042 331777.65630000085, 258615.79700000025 331827.1875,
> 258627.06240000017 331847.31240000017, 258649.70320000034 331831.6875,
> 258682.99990000017 331808.90630000085, 258702.9063 331796.18740000017,
> 258704.0312 331796.18740000017)), ((258580.85929999966 331648.21880000085,
> 258582.5937 331647.5, 258586.0938 331645.68740000017, 258596.79690000042
> 331640.00009999983, 258613.70320000034 331630.18740000017, 258634.9062
> 331617.6875, 258635.5938 331617.31259999983, 258642 331613.90619999915,
> 258645.0938 331612.09380000085, 258648.0937 331610.09369999915,
> 258653.20309999958 331605.90630000085, 258664.95299999975 331597.3125,
> 258668.70309999958 331594.31240000017, 258672.4062 331591.49990000017,
> 258676.20299999975 331588.81240000017, 258678.50009999983 331587.3125,
> 258682.5938 331584.99990000017, 258691.70309999958 331580.49990000017,
> 258700.00009999983 331576.40619999915, 258702.20309999958
> 331575.59380000085, 258704.2187 331574.74990000017, 258703.29690000042
> 331572.81240000017, 258702.79690000042 331571.90619999915,
> 258701.29700000025 331569.74990000017, 258700.29679999966
> 331568.40630000085, 258699.29679999966 331567.31240000017, 258697.5
> 331565.8125, 258696.70309999958 331565.09380000085, 258693.99990000017
> 331561.68759999983, 258691.29690000042 331558.31259999983,
> 258690.70309999958 331557.59380000085, 258689.50009999983
> 331556.18759999983, 258688.20320000034 331554.90619999915,
> 258686.79690000042 331553.6875, 258682.20320000034 331551, 258677.0938
> 331548.31259999983, 258671.29690000042 331545.5, 258668.00009999983
> 331544.00009999983, 258662.0938 331541.59380000085, 258655.99990000017
> 331539.40619999915, 258648.0937 331535.4375, 258637 331530.31240000017,
> 258635.5938 331529.09369999915, 258632 331526.49990000017,
> 258626.79690000042 331523.09369999915, 258621.4063 331519.40630000085,
> 258616.3437 331517.75, 258614.9062 331517.68759999983, 258613.70320000034
> 331517.90619999915, 258612.49990000017 331518.18759999983,
> 258611.29690000042 331518.59369999915, 258610.0937 331519.15630000085,
> 258609.00009999983 331519.90630000085, 258608.20320000034 331520.6875,
> 258605.5937 331523.3125, 258602.79679999966 331525.59380000085, 258599.9063
> 331527.90619999915, 258598.00009999983 331529.18759999983, 258595
> 331531.1875, 258573.5 331545, 258568.4063 331547.31259999983,
> 258559.70320000034 331550.90630000085, 258545.0937 331556.81240000017,
> 258542.0938 331558.09380000085, 258530.9063 331562.90630000085,
> 258529.79700000025 331563.49990000017, 258526.10929999966 331565.2185999993,
> 258520.09389999975 331568, 258511.50009999983 331572.40630000085,
> 258513.0937 331574.09380000085, 258515.79690000042 331577.59369999915,
> 258535.0937 331598.5, 258542.0938 331606.31240000017, 258546.0937
> 331610.90630000085, 258550.20309999958 331615.18759999983,
> 258554.29679999966 331619.18740000017, 258564.20320000034
> 331628.59380000085, 258565.29679999966 331629.68740000017, 258569.4063
> 331634.31259999983, 258573.45299999975 331639.09380000085,
> 258580.85929999966 331648.21880000085)))*
>
>
> *Request:*
>
> <wps:Execute version="1.0.0" service="WPS" xmlns:xsi="
> http://www.w3.org/2001/XMLSchema-instance"; xmlns="
> http://www.opengis.net/wps/1.0.0"; xmlns:wfs="http://www.opengis.net/wfs";
> xmlns:wps="http://www.opengis.net/wps/1.0.0"; xmlns:ows="
> http://www.opengis.net/ows/1.1"; xmlns:gml="http://www.opengis.net/gml";
> xmlns:ogc="http://www.opengis.net/ogc"; xmlns:wcs="
> http://www.opengis.net/wcs/1.1.1"; xmlns:xlink="
> http://www.w3.org/1999/xlink"; xsi:schemaLocation="
> http://www.opengis.net/wps/1.0.0
> http://schemas.opengis.net/wps/1.0.0/wpsAll.xsd";>
> <ows:Identifier>
> JTS:union
> </ows:Identifier>
> <wps:DataInputs>
> <wps:Input>
> <ows:Identifier>
> geom
> </ows:Identifier>
> <wps:Data>
> <wps:ComplexData mimeType="application/wkt">
> POLYGON((258704.0312 331796.18740000017,258697.20299999975
> 331788.09369999915,258694.95309999958 331785.65619999915,258685.3125
> 331775.28130000085,258676 331765.3125,258672.29690000042
> 331761.31240000017,258652.9062 331741.49990000017,258652.375
> 331740.96869999915,258649.29690000042 331743.18740000017,258648.29690000042
> 331744.5,258647.20309999958 331745.5939000007,258646.29679999966
> 331746.40630000085,258643.6563 331748.18740000017,258633.5 331754.8125,258633
> 331755.09369999915,258623.0938 331761.09369999915,258615.5937
> 331765.18759999983,258611.70299999975 331767.31240000017,258601.99990000017
> 331772.31240000017,258597.50009999983 331774.09380000085,258593.00009999983
> 331775.8125,258588.17190000042 331777.65630000085,258615.79700000025
> 331827.1875,258627.06240000017 331847.31240000017,258649.70320000034
> 331831.6875,258682.99990000017 331808.90630000085,258702.9063
> 331796.18740000017,258704.0312 331796.18740000017))
> </wps:ComplexData>
> </wps:Data>
> </wps:Input>
> <wps:Input>
> <ows:Identifier>geom</ows:Identifier>
> <wps:Data>
> <wps:ComplexData mimeType="application/wkt">
> POLYGON((258580.85929999966 331648.21880000085,258582.5937
> 331647.5,258586.0938 331645.68740000017,258596.79690000042
> 331640.00009999983,258613.70320000034 331630.18740000017,258634.9062
> 331617.6875,258635.5938 331617.31259999983,258642
> 331613.90619999915,258645.0938 331612.09380000085,258648.0937
> 331610.09369999915,258653.20309999958 331605.90630000085,258664.95299999975
> 331597.3125,258668.70309999958 331594.31240000017,258672.4062
> 331591.49990000017,258676.20299999975 331588.81240000017,258678.50009999983
> 331587.3125,258682.5938 331584.99990000017,258691.70309999958
> 331580.49990000017,258700.00009999983 331576.40619999915,258702.20309999958
> 331575.59380000085,258704.2187 331574.74990000017,258703.29690000042
> 331572.81240000017,258702.79690000042 331571.90619999915,258701.29700000025
> 331569.74990000017,258700.29679999966 331568.40630000085,258699.29679999966
> 331567.31240000017,258697.5 331565.8125,258696.70309999958
> 331565.09380000085,258693.99990000017 331561.68759999983,258691.29690000042
> 331558.31259999983,258690.70309999958 331557.59380000085,258689.50009999983
> 331556.18759999983,258688.20320000034 331554.90619999915,258686.79690000042
> 331553.6875,258682.20320000034 331551,258677.0938
> 331548.31259999983,258671.29690000042 331545.5,258668.00009999983
> 331544.00009999983,258662.0938 331541.59380000085,258655.99990000017
> 331539.40619999915,258648.0937 331535.4375,258637
> 331530.31240000017,258635.5938 331529.09369999915,258632
> 331526.49990000017,258626.79690000042 331523.09369999915,258621.4063
> 331519.40630000085,258616.3437 331517.75,258614.9062
> 331517.68759999983,258613.70320000034 331517.90619999915,258612.49990000017
> 331518.18759999983,258611.29690000042 331518.59369999915,258610.0937
> 331519.15630000085,258609.00009999983 331519.90630000085,258608.20320000034
> 331520.6875,258605.5937 331523.3125,258602.79679999966
> 331525.59380000085,258599.9063 331527.90619999915,258598.00009999983
> 331529.18759999983,258595 331531.1875,258573.5 331545,258568.4063
> 331547.31259999983,258559.70320000034 331550.90630000085,258545.0937
> 331556.81240000017,258542.0938 331558.09380000085,258530.9063
> 331562.90630000085,258529.79700000025 331563.49990000017,258526.10929999966
> 331565.2185999993,258520.09389999975 331568,258511.50009999983
> 331572.40630000085,258513.0937 331574.09380000085,258515.79690000042
> 331577.59369999915,258535.0937 331598.5,258542.0938
> 331606.31240000017,258546.0937 331610.90630000085,258550.20309999958
> 331615.18759999983,258554.29679999966 331619.18740000017,258564.20320000034
> 331628.59380000085,258565.29679999966 331629.68740000017,258569.4063
> 331634.31259999983,258573.45299999975 331639.09380000085,258580.85929999966
> 331648.21880000085))
> </wps:ComplexData>
> </wps:Data>
> </wps:Input>
> </wps:DataInputs>
> <wps:ResponseForm>
> <wps:RawDataOutput schema="http://localhost:9999/geoserver/wfs?";
> mimeType="application/wkt" encoding="UTF-8">
> <ows:Identifier xmlns:ows="http://www.opengis.net/ows/1.1
> ">result</ows:Identifier>
> </wps:RawDataOutput>
> </wps:ResponseForm>
> </wps:Execute>
>
> --
> Thanks and Warm Regards
> Debasish Sahu
>
>
> ------------------------------------------------------------------------------
> Xperia(TM) PLAY
> It's a major breakthrough. An authentic gaming
> smartphone on the nation's most reliable network.
> And it wants your games.
> http://p.sf.net/sfu/verizon-sfdev
> _______________________________________________
> Geoserver-devel mailing list
> Geoserver-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/geoserver-devel
>
>
--
-------------------------------------------------------
Ing. Daniele Romagnoli
GeoSolutions S.A.S.
Software Engineer
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 962313
mob: +39 328 0559267
http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.youtube.com/user/GeoSolutionsIT
http://it.linkedin.com/in/danieleromagnoli
-------------------------------------------------------
------------------------------------------------------------------------------
Xperia(TM) PLAY
It's a major breakthrough. An authentic gaming
smartphone on the nation's most reliable network.
And it wants your games.
http://p.sf.net/sfu/verizon-sfdev
_______________________________________________
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