[postgis-users] problem with st_makevalid and (LineString)

[islanis at infomed.sld.cu]

"Rémi Cura" <remi.cura at gmail.com> escribió:

Remi i dont understand what do you mean here,

> You can try to analyze a bit to understand better
> (for the following I consider your table doesn't contains too much data)
>
> with the_data AS (
> SELECT the_geom, ST_ISValid(the_geom) AS is_valid,
> ST_IsValidReason(the_geom)
> FROM ft_potencial
> )
> SELECT *, ST_AsText(ST_MakeValid(the_geom)) AS corrected_geom,
> ST_AsText(the_geom) AS original_geometry, detail.*
> FROM the_data, *ST_IsValidDetail*(the_geom) AS detail
> WHERE is_valid = false
> AND GeometryType(the_geom) ILIKE '%POLYGON%'
>
>  My guess : you have an invalid no-area polygon, so the makevalid function
> transform it into a line

  ok, but like i say above, i dont understan, please be more specific,  
please, but thanks

>
> Cheers,
> Rémi-C
>
>
> 2014-05-16 18:14 GMT+02:00 <islanis at infomed.sld.cu>:
>
>>
>>
>> "Ivan Santiago" <isantiago at ogp.pr.gov> escribió:
>>
>>
>>  Hello:
>>>
>>> Run
>>> SELECT PostGIS_full_version();
>>> TO know if your installation has GEOS 3.3.0 or above.
>>>
>> I get this
>>
>>
>> "POSTGIS="2.0.0 r9605" GEOS="3.3.3-CAPI-1.7.4" PROJ="Rel. 4.8.0, 6 March
>> 2012" GDAL="GDAL 1.9.0, released 2011/12/29" LIBXML="2.7.8"
>> LIBJSON="UNKNOWN" TOPOLOGY RASTER"
>>
>>
>>
>>
>>> ---------------------------
>>> Iván Santiago
>>> GIS Specialist
>>> Information Technologies
>>> Office of Management and Budget
>>> 787.725.9420 x 2378
>>> Calle Cruz 254
>>> PO Box 9023228
>>> San Juan, PR 00902-3228
>>> http://gis.pr.gov
>>>
>>>
>>> -----Original Message-----
>>> From: postgis-users-bounces at lists.osgeo.org [mailto:
>>> postgis-users-bounces at lists.osgeo.org] On Behalf Of
>>> islanis at infomed.sld.cu
>>> Sent: Friday, May 16, 2014 11:24 AM
>>> To: postgis-users at lists.osgeo.org
>>> Subject: [postgis-users] problem with st_makevalid and (LineString)
>>>
>>> Hello people, i got a problem where i have no idea what can i do.
>>>
>>> I have this table
>>>
>>> CREATE TABLE ft_potencial
>>> (
>>>    id_dw_ft_potencial integer NOT NULL,
>>>    id_dw_tipo integer NOT NULL,
>>>    id_dw_mes integer NOT NULL,
>>>    id_dw_municipio integer NOT NULL,
>>>    id_dw_date integer NOT NULL,
>>>    potencial real NOT NULL,
>>>    area real NOT NULL,
>>>    the_geom geometry(Polygon,4326),
>>>    CONSTRAINT ft_potencial_pkey PRIMARY KEY (id_dw_ft_potencial,
>>> id_dw_tipo, id_dw_mes, id_dw_municipio, id_dw_date)
>>> )
>>> WITH (
>>>    OIDS=FALSE
>>> );
>>>
>>> and i want to clean  the errors that it has using the function
>>> ST_MakeValid in this way
>>>
>>> update ft_potencial set the_geom=ST_MakeValid(the_geom);
>>>
>>> but it always return this error
>>>
>>> ERROR:  Geometry type (LineString) does not match column type (Polygon)
>>>
>>> ********** Error **********
>>>
>>> ERROR: Geometry type (LineString) does not match column type (Polygon)
>>> Estado SQL:22023
>>>
>>>
>>> what can i do to fix or clean the geometry without problems.
>>>
>>> please help.
>>> thanks
>>>
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>>
>>
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>> Este mensaje le ha llegado mediante el servicio de correo electronico que
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>> usar el servicio a tales fines y cumplir con las regulaciones establecidas
>>
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