[Gvsig_english] from multipoint to point shape

[Johannes Valenta]

Hi Wolfgang, list,

geometries2points should be located at "tools for vector layers".
Unfortunately I do not know how to figure out which Sextante version I am
using. It is the one with 241 algorithms.
I just checked this function with one plain polygon and it worked properly
delivering all vertices as points. Nice, I should use this more often ;-)
Maybe dealing with multi-part features is not implemented?

Best,

Johannes

2009/8/28 Wolfgang Qual <Wolfgang.Qual at muenchen.de>

> Hi Johannes,
> I did not even _find_ the function geometries to points - ...
>
> Beste,
> Wolfgang
>
> Johannes Valenta schrieb:
>
>> Hi all,
>>
>> I tried to use /geometries to points/ but Sextante won't accept my
>> multipoint layer  which I created in gvSIG.
>> While Antonio was answering I found the follwing "not so complicated"
>> workaround:
>> -export multipoint shp to PostGIS
>> -use this SQL-Statment:
>> "SELECT ST_X(geom) As x, ST_Y(geom) as y
>> FROM (SELECT (ST_Dump(mpt.the_geom)).geom
>>   FROM multipointtest mpt)AS mpt;"
>> this will explode the multipoints into points (function ST_Dump) and
>>  create  the coordinates columns (functions ST_X and ST_Y)
>> -Export the results as csv
>> -Add csv as Event Layer in gvSIG
>> - be happy ;-)
>> see screenshot
>>
>> Best,
>> Johannes
>>
>> PS: I  still use 1.1.2
>>
>>
>> 2009/8/28 Antonio Falciano <afalciano at yahoo.it <mailto:afalciano at yahoo.it
>> >>
>>
>>
>>    Wolfgang Qual ha scritto:
>>    > Hello Jean,
>>    > hm. right. I would suggest to write a feature request to this
>>    list. I
>>    > could imagine that it is not that complicated to write a
>>    function for
>>    > this purpose.
>>    > However, I am not a developer. Therefore, I would be very glad,
>>    if one
>>    > of the developers could comment this issue - ...
>>    > gvSIG allows to create new multipoint features, but will it allow to
>>    > convert multipart shapefiles to singlepart? Will it be possible to
>>    > write a nice script for this purpose once the new 2.0 is available?
>>    > Maybe it is more complex than I think. ogr2ogr does not allow
>>    the user
>>    > to do this conversion...
>>    > Any comments would be great.
>>
>>    Hi all,
>>    you can try with "Geometries to Points" tool of Sextante.
>>
>>    Best regards,
>>    Antonio
>>
>>    > Best,
>>    > Wolfgang
>>    >
>>    >
>>    > Jean Hemmi schrieb:
>>    >> Hi Wolfgang,
>>    >> The Sextant option you've proposed does not change the
>>    shapefile type from
>>    >> multipoint to point...
>>    >> It explose the points in many shp files.
>>    >>
>>    >> Has anybody an idea to change MULPOINT to POINT ?
>>    >> ogr2ogr refuse... Gvsig ?
>>    >>
>>    >> This thread is not about Sextant on 1.2 and 1.9...
>>    >>
>>    >> Thanks for your help.
>>    >>
>>    >> Jean
>>    >>
>>
>>    --
>>    Antonio Falciano
>>    http://www.linkedin.com/in/antoniofalciano
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>>
>>
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>
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>
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