Re: [postgis-users] Postgres Polygon to Postgis Geometry
Mike,
Thanks!
On Wed, Oct 27, 2010 at 1:17 AM, Mike Toews wrote:
> Ah, you are looking for this:
>
> http://postgis.refractions.net/docs/ST_Transform.html
>
> So you need to cast your object as a polygon, set the SRID to your
> projected coordinate system (I'm just guessing SRID=29181 for your
> example http://spatialreference.org/ref/epsg/29181/ .. look up the
> SRID for your original data). Then it can be transformed into long/lat
> coords:
>
> SELECT ST_Transform(ST_SetSRID('BOX(743295.3125 7182512.5,744414.75
> 7183817.5)'::box2d::geometry, 29181), 4326);
>
> -Mike
>
> On 26 October 2010 20:01, Wagner Santos wrote:
> > Mike,
> > Yes, I mean georeferenced (sorry for my English). I made a cast to text
> and
> > converted to postgis geometry, but I couldn't use ST_SetSRID.
> > I would like to tranfer a polygon to correct position. I have a
> > Polygon "BOX(743295.3125 7182512.5,744414.75 7183817.5)" and I like to
> > transfer it to "BOX(-54.515022277832 -25.4530487060547,-54.5029907226562
> > -25.4447135925293)".
> > I tried ST_Affine but I don't know the correct parameters, I
> tried ST_Scale
> > but I had the same problem. My idea was transform and set srid.
> >
> > On Tue, Oct 26, 2010 at 11:44 PM, Mike Toews wrote:
> >>
> >> Hi Wagner,
> >>
> >> I'm not sure what you mean by "geo" and "non-geo" .. you mean
> >> georeferenced, like longitude/latitude?
> >>
> >> For points, you can keep thing binary and just use ST_MakePoint(x,y).
> >> And to assign a coordinate system, use it with ST_SetSRID:
> >>
> >> SELECT ST_SetSRID(ST_MakePoint(p[0], p[1]), 4326)
> >> from (
> >> select point '(-123.112793, 49.246293)' as p
> >> ) as foo;
> >>
> >> I'm not sure how to do similar binary conversions for path and
> >> polygon, or other types. You might have to cast to text, and wrangle
> >> it into some form of WKT, then pass it to ST_SetSRID(text, integer) to
> >> make a geometry object for PostGIS.
> >>
> >> -Mike
> >>
> >>
> >> On 26 October 2010 18:17, Wagner Santos
> wrote:
> >> > I created a Postgis Geometry from Postgres Polygon converting them
> from
> >> > string and using linefromtext to create a geometry but this
> information
> >> > isn't geo.
> >> > I have non geo points and I want to convert to my correct position and
> >> > set
> >> > SRID, for example P(70 72) to P(-54 -25), how can I do this?
> >> > Thanks!
> >> >
> >> > On Tue, Oct 26, 2010 at 1:18 PM, Wagner Santos <
> wagner.des...@gmail.com>
> >> > wrote:
> >> >>
> >> >> Hello,
> >> >> I'm new with postgis and I have a legacy database with Postgres
> >> >> Polygon, I
> >> >> want to convert this to a Postgis Geometry. Is there a way?
> >> >> I try to do with replace string and linefromtext with sucess, but I
> >> >> think
> >> >> doesn't better solution because I can't set a valid SRID.
> >> >> Thanks!
> >> >
> >> > ___
> >> > postgis-users mailing list
> >> > postgis-users@postgis.refractions.net
> >> > http://postgis.refractions.net/mailman/listinfo/postgis-users
> >> >
> >> >
> >> ___
> >> postgis-users mailing list
> >> postgis-users@postgis.refractions.net
> >> http://postgis.refractions.net/mailman/listinfo/postgis-users
> >
> >
> > ___
> > postgis-users mailing list
> > postgis-users@postgis.refractions.net
> > http://postgis.refractions.net/mailman/listinfo/postgis-users
> >
> >
> ___
> postgis-users mailing list
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>
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Re: [postgis-users] Postgres Polygon to Postgis Geometry
Ah, you are looking for this:
http://postgis.refractions.net/docs/ST_Transform.html
So you need to cast your object as a polygon, set the SRID to your
projected coordinate system (I'm just guessing SRID=29181 for your
example http://spatialreference.org/ref/epsg/29181/ .. look up the
SRID for your original data). Then it can be transformed into long/lat
coords:
SELECT ST_Transform(ST_SetSRID('BOX(743295.3125 7182512.5,744414.75
7183817.5)'::box2d::geometry, 29181), 4326);
-Mike
On 26 October 2010 20:01, Wagner Santos wrote:
> Mike,
> Yes, I mean georeferenced (sorry for my English). I made a cast to text and
> converted to postgis geometry, but I couldn't use ST_SetSRID.
> I would like to tranfer a polygon to correct position. I have a
> Polygon "BOX(743295.3125 7182512.5,744414.75 7183817.5)" and I like to
> transfer it to "BOX(-54.515022277832 -25.4530487060547,-54.5029907226562
> -25.4447135925293)".
> I tried ST_Affine but I don't know the correct parameters, I tried ST_Scale
> but I had the same problem. My idea was transform and set srid.
>
> On Tue, Oct 26, 2010 at 11:44 PM, Mike Toews wrote:
>>
>> Hi Wagner,
>>
>> I'm not sure what you mean by "geo" and "non-geo" .. you mean
>> georeferenced, like longitude/latitude?
>>
>> For points, you can keep thing binary and just use ST_MakePoint(x,y).
>> And to assign a coordinate system, use it with ST_SetSRID:
>>
>> SELECT ST_SetSRID(ST_MakePoint(p[0], p[1]), 4326)
>> from (
>> select point '(-123.112793, 49.246293)' as p
>> ) as foo;
>>
>> I'm not sure how to do similar binary conversions for path and
>> polygon, or other types. You might have to cast to text, and wrangle
>> it into some form of WKT, then pass it to ST_SetSRID(text, integer) to
>> make a geometry object for PostGIS.
>>
>> -Mike
>>
>>
>> On 26 October 2010 18:17, Wagner Santos wrote:
>> > I created a Postgis Geometry from Postgres Polygon converting them from
>> > string and using linefromtext to create a geometry but this information
>> > isn't geo.
>> > I have non geo points and I want to convert to my correct position and
>> > set
>> > SRID, for example P(70 72) to P(-54 -25), how can I do this?
>> > Thanks!
>> >
>> > On Tue, Oct 26, 2010 at 1:18 PM, Wagner Santos
>> > wrote:
>> >>
>> >> Hello,
>> >> I'm new with postgis and I have a legacy database with Postgres
>> >> Polygon, I
>> >> want to convert this to a Postgis Geometry. Is there a way?
>> >> I try to do with replace string and linefromtext with sucess, but I
>> >> think
>> >> doesn't better solution because I can't set a valid SRID.
>> >> Thanks!
>> >
>> > ___
>> > postgis-users mailing list
>> > postgis-users@postgis.refractions.net
>> > http://postgis.refractions.net/mailman/listinfo/postgis-users
>> >
>> >
>> ___
>> postgis-users mailing list
>> postgis-users@postgis.refractions.net
>> http://postgis.refractions.net/mailman/listinfo/postgis-users
>
>
> ___
> postgis-users mailing list
> postgis-users@postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-users
>
>
___
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Re: [postgis-users] Postgres Polygon to Postgis Geometry
Mike, Yes, I mean georeferenced (sorry for my English). I made a cast to text and converted to postgis geometry, but I couldn't use ST_SetSRID. I would like to tranfer a polygon to correct position. I have a Polygon "BOX(743295.3125 7182512.5,744414.75 7183817.5)" and I like to transfer it to "BOX(-54.515022277832 -25.4530487060547,-54.5029907226562 -25.4447135925293)". I tried ST_Affine but I don't know the correct parameters, I tried ST_Scale but I had the same problem. My idea was transform and set srid. On Tue, Oct 26, 2010 at 11:44 PM, Mike Toews wrote: > Hi Wagner, > > I'm not sure what you mean by "geo" and "non-geo" .. you mean > georeferenced, like longitude/latitude? > > For points, you can keep thing binary and just use ST_MakePoint(x,y). > And to assign a coordinate system, use it with ST_SetSRID: > > SELECT ST_SetSRID(ST_MakePoint(p[0], p[1]), 4326) > from ( > select point '(-123.112793, 49.246293)' as p > ) as foo; > > I'm not sure how to do similar binary conversions for path and > polygon, or other types. You might have to cast to text, and wrangle > it into some form of WKT, then pass it to ST_SetSRID(text, integer) to > make a geometry object for PostGIS. > > -Mike > > > On 26 October 2010 18:17, Wagner Santos wrote: > > I created a Postgis Geometry from Postgres Polygon converting them from > > string and using linefromtext to create a geometry but this information > > isn't geo. > > I have non geo points and I want to convert to my correct position and > set > > SRID, for example P(70 72) to P(-54 -25), how can I do this? > > Thanks! > > > > On Tue, Oct 26, 2010 at 1:18 PM, Wagner Santos > > wrote: > >> > >> Hello, > >> I'm new with postgis and I have a legacy database with Postgres Polygon, > I > >> want to convert this to a Postgis Geometry. Is there a way? > >> I try to do with replace string and linefromtext with sucess, but I > think > >> doesn't better solution because I can't set a valid SRID. > >> Thanks! > > > > ___ > > postgis-users mailing list > > postgis-users@postgis.refractions.net > > http://postgis.refractions.net/mailman/listinfo/postgis-users > > > > > ___ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users > ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
Re: [postgis-users] Postgres Polygon to Postgis Geometry
Hi Wagner, I'm not sure what you mean by "geo" and "non-geo" .. you mean georeferenced, like longitude/latitude? For points, you can keep thing binary and just use ST_MakePoint(x,y). And to assign a coordinate system, use it with ST_SetSRID: SELECT ST_SetSRID(ST_MakePoint(p[0], p[1]), 4326) from ( select point '(-123.112793, 49.246293)' as p ) as foo; I'm not sure how to do similar binary conversions for path and polygon, or other types. You might have to cast to text, and wrangle it into some form of WKT, then pass it to ST_SetSRID(text, integer) to make a geometry object for PostGIS. -Mike On 26 October 2010 18:17, Wagner Santos wrote: > I created a Postgis Geometry from Postgres Polygon converting them from > string and using linefromtext to create a geometry but this information > isn't geo. > I have non geo points and I want to convert to my correct position and set > SRID, for example P(70 72) to P(-54 -25), how can I do this? > Thanks! > > On Tue, Oct 26, 2010 at 1:18 PM, Wagner Santos > wrote: >> >> Hello, >> I'm new with postgis and I have a legacy database with Postgres Polygon, I >> want to convert this to a Postgis Geometry. Is there a way? >> I try to do with replace string and linefromtext with sucess, but I think >> doesn't better solution because I can't set a valid SRID. >> Thanks! > > ___ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users > > ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
Re: [postgis-users] Postgres Polygon to Postgis Geometry
I created a Postgis Geometry from Postgres Polygon converting them from string and using linefromtext to create a geometry but this information isn't geo. I have non geo points and I want to convert to my correct position and set SRID, for example P(70 72) to P(-54 -25), how can I do this? Thanks! On Tue, Oct 26, 2010 at 1:18 PM, Wagner Santos wrote: > Hello, > I'm new with postgis and I have a legacy database with Postgres Polygon, I > want to convert this to a Postgis Geometry. Is there a way? > I try to do with replace string and linefromtext with sucess, but I think > doesn't better solution because I can't set a valid SRID. > > Thanks! > ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
[postgis-users] Postgres Polygon to Postgis Geometry
Hello, I'm new with postgis and I have a legacy database with Postgres Polygon, I want to convert this to a Postgis Geometry. Is there a way? I try to do with replace string and linefromtext with sucess, but I think doesn't better solution because I can't set a valid SRID. Thanks! ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
