Re: [Qgis-user] Why QGIS change the SRS?

[jratike80]

Goyo wrote
> No, those are WKT and they include some data which is different (name
> and EPSG code). The proj4 strings are identical:
> 
> http://spatialreference.org/ref/epsg/etrs89-etrs-tm30/proj4/
> http://spatialreference.org/ref/epsg/etrs89-utm-zone-30n/proj4/

The real difference between these projections is in the order of coordinate
axis and it can be queried from the EPSG database:

This one is Northing-Easting system
http://epsg-registry.org/export.htm?wkt=urn:ogc:def:crs:EPSG::3042

But this one is Easting-Northing system
http://epsg-registry.org/export.htm?wkt=urn:ogc:def:crs:EPSG::25830

Mixing those two may cause problems for example when data are exported into
GML format.

-Jukka Rahkonen-





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Re: [Qgis-user] Why QGIS change the SRS?

[Goyo]

No, those are WKT and they include some data which is different (name
and EPSG code). The proj4 strings are identical:

http://spatialreference.org/ref/epsg/etrs89-etrs-tm30/proj4/
http://spatialreference.org/ref/epsg/etrs89-utm-zone-30n/proj4/

2017-02-21 8:02 GMT+01:00 Rafa García Castillo :
>   Sorry Goyo. I think the PROJ string is in the previous message from
> Alexandre. I suppose that´s the right answer...
>
>   Thanks
>
>   Rafa
>
> 2017-02-21 7:12 GMT+01:00 Rafa García Castillo :
>>
>> Hi Hoyo. It could be what you've said. How can I see how it looks the
>> PROJ4 string?
>> Thanks
>> Rafa
>>
>> El 20 feb. 2017 9:14 p. m., "Goyo"  escribió:
>>>
>>> I think it is because it looks at the proj4 string, which is the same.
>>>
>>> 2017-02-17 10:59 GMT+01:00 Rafa García Castillo :
>>> >   Thanks Alexandre for answering. Yes, those projections are quite
>>> > similar,
>>> > but one is in UTM coordinates and the other is TM. I can imagine that
>>> > the
>>> > use of both projections is the same in most of the cases, but makes me
>>> > wonder why QGIS does this change, because they have different EPSG
>>> > code.
>>> >
>>> >   Thanks again.
>>> >
>>> >   Rafa
>>> >
>>> > El 16 feb. 2017 12:45 p. m., "Alexandre Neto" 
>>> > escribió:
>>> >>
>>> >> Seems that those two projections are equal:
>>> >>
>>> >> http://spatialreference.org/ref/epsg/etrs89-utm-zone-30n/html/
>>> >>
>>> >> http://spatialreference.org/ref/epsg/etrs89-etrs-tm30/html/
>>> >>
>>> >> If you want to force EPSG:25830 into that layer, use the Vector >
>>> >> Management tools > Define Projection
>>> >>
>>> >>
>>> >>
>>> >> Rafa García Castillo  escreveu no dia quinta,
>>> >> 16/02/2017
>>> >> às 11:11:
>>> >>>
>>> >>>   Hello everybody,
>>> >>>
>>> >>>   Just one question: I am using QGIS v2.18. I start a project using
>>> >>> EPSG:25830. When I load a SHP layer into QGIS, then QGIS change the
>>> >>> SRS of
>>> >>> the project "on the fly" to EPSG:3042, even when the PRJ file of the
>>> >>> SHP
>>> >>> layer shows that the SHP is in EPSG:25830. Why?
>>> >>>
>>> >>>   Thanks in advance
>>> >>>
>>> >>>   Rafa
>>> >>> ___
>>> >>> Qgis-user mailing list
>>> >>> Qgis-user@lists.osgeo.org
>>> >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>> >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>> >>
>>> >> --
>>> >> Alexandre Neto
>>> >> -
>>> >> @AlexNetoGeo
>>> >> http://sigsemgrilhetas.wordpress.com
>>> >> http://gisunchained.wordpress.com
>>> >
>>> >
>>> > ___
>>> > Qgis-user mailing list
>>> > Qgis-user@lists.osgeo.org
>>> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>> > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
>
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Re: [Qgis-user] Why QGIS change the SRS?

[Rafa García Castillo]

  Sorry Goyo. I think the PROJ string is in the previous message from
Alexandre. I suppose that´s the right answer...

  Thanks

  Rafa

2017-02-21 7:12 GMT+01:00 Rafa García Castillo :

> Hi Hoyo. It could be what you've said. How can I see how it looks the
> PROJ4 string?
> Thanks
> Rafa
>
> El 20 feb. 2017 9:14 p. m., "Goyo"  escribió:
>
>> I think it is because it looks at the proj4 string, which is the same.
>>
>> 2017-02-17 10:59 GMT+01:00 Rafa García Castillo :
>> >   Thanks Alexandre for answering. Yes, those projections are quite
>> similar,
>> > but one is in UTM coordinates and the other is TM. I can imagine that
>> the
>> > use of both projections is the same in most of the cases, but makes me
>> > wonder why QGIS does this change, because they have different EPSG code.
>> >
>> >   Thanks again.
>> >
>> >   Rafa
>> >
>> > El 16 feb. 2017 12:45 p. m., "Alexandre Neto" 
>> > escribió:
>> >>
>> >> Seems that those two projections are equal:
>> >>
>> >> http://spatialreference.org/ref/epsg/etrs89-utm-zone-30n/html/
>> >>
>> >> http://spatialreference.org/ref/epsg/etrs89-etrs-tm30/html/
>> >>
>> >> If you want to force EPSG:25830 into that layer, use the Vector >
>> >> Management tools > Define Projection
>> >>
>> >>
>> >>
>> >> Rafa García Castillo  escreveu no dia quinta,
>> 16/02/2017
>> >> às 11:11:
>> >>>
>> >>>   Hello everybody,
>> >>>
>> >>>   Just one question: I am using QGIS v2.18. I start a project using
>> >>> EPSG:25830. When I load a SHP layer into QGIS, then QGIS change the
>> SRS of
>> >>> the project "on the fly" to EPSG:3042, even when the PRJ file of the
>> SHP
>> >>> layer shows that the SHP is in EPSG:25830. Why?
>> >>>
>> >>>   Thanks in advance
>> >>>
>> >>>   Rafa
>> >>> ___
>> >>> Qgis-user mailing list
>> >>> Qgis-user@lists.osgeo.org
>> >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> >>
>> >> --
>> >> Alexandre Neto
>> >> -
>> >> @AlexNetoGeo
>> >> http://sigsemgrilhetas.wordpress.com
>> >> http://gisunchained.wordpress.com
>> >
>> >
>> > ___
>> > Qgis-user mailing list
>> > Qgis-user@lists.osgeo.org
>> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>
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Re: [Qgis-user] Why QGIS change the SRS?

[Rafa García Castillo]

Hi Hoyo. It could be what you've said. How can I see how it looks the PROJ4
string?
Thanks
Rafa

El 20 feb. 2017 9:14 p. m., "Goyo"  escribió:

> I think it is because it looks at the proj4 string, which is the same.
>
> 2017-02-17 10:59 GMT+01:00 Rafa García Castillo :
> >   Thanks Alexandre for answering. Yes, those projections are quite
> similar,
> > but one is in UTM coordinates and the other is TM. I can imagine that the
> > use of both projections is the same in most of the cases, but makes me
> > wonder why QGIS does this change, because they have different EPSG code.
> >
> >   Thanks again.
> >
> >   Rafa
> >
> > El 16 feb. 2017 12:45 p. m., "Alexandre Neto" 
> > escribió:
> >>
> >> Seems that those two projections are equal:
> >>
> >> http://spatialreference.org/ref/epsg/etrs89-utm-zone-30n/html/
> >>
> >> http://spatialreference.org/ref/epsg/etrs89-etrs-tm30/html/
> >>
> >> If you want to force EPSG:25830 into that layer, use the Vector >
> >> Management tools > Define Projection
> >>
> >>
> >>
> >> Rafa García Castillo  escreveu no dia quinta,
> 16/02/2017
> >> às 11:11:
> >>>
> >>>   Hello everybody,
> >>>
> >>>   Just one question: I am using QGIS v2.18. I start a project using
> >>> EPSG:25830. When I load a SHP layer into QGIS, then QGIS change the
> SRS of
> >>> the project "on the fly" to EPSG:3042, even when the PRJ file of the
> SHP
> >>> layer shows that the SHP is in EPSG:25830. Why?
> >>>
> >>>   Thanks in advance
> >>>
> >>>   Rafa
> >>> ___
> >>> Qgis-user mailing list
> >>> Qgis-user@lists.osgeo.org
> >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
> >>
> >> --
> >> Alexandre Neto
> >> -
> >> @AlexNetoGeo
> >> http://sigsemgrilhetas.wordpress.com
> >> http://gisunchained.wordpress.com
> >
> >
> > ___
> > Qgis-user mailing list
> > Qgis-user@lists.osgeo.org
> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
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Re: [Qgis-user] Why QGIS change the SRS?

[Goyo]

I think it is because it looks at the proj4 string, which is the same.

2017-02-17 10:59 GMT+01:00 Rafa García Castillo :
>   Thanks Alexandre for answering. Yes, those projections are quite similar,
> but one is in UTM coordinates and the other is TM. I can imagine that the
> use of both projections is the same in most of the cases, but makes me
> wonder why QGIS does this change, because they have different EPSG code.
>
>   Thanks again.
>
>   Rafa
>
> El 16 feb. 2017 12:45 p. m., "Alexandre Neto" 
> escribió:
>>
>> Seems that those two projections are equal:
>>
>> http://spatialreference.org/ref/epsg/etrs89-utm-zone-30n/html/
>>
>> http://spatialreference.org/ref/epsg/etrs89-etrs-tm30/html/
>>
>> If you want to force EPSG:25830 into that layer, use the Vector >
>> Management tools > Define Projection
>>
>>
>>
>> Rafa García Castillo  escreveu no dia quinta, 16/02/2017
>> às 11:11:
>>>
>>>   Hello everybody,
>>>
>>>   Just one question: I am using QGIS v2.18. I start a project using
>>> EPSG:25830. When I load a SHP layer into QGIS, then QGIS change the SRS of
>>> the project "on the fly" to EPSG:3042, even when the PRJ file of the SHP
>>> layer shows that the SHP is in EPSG:25830. Why?
>>>
>>>   Thanks in advance
>>>
>>>   Rafa
>>> ___
>>> Qgis-user mailing list
>>> Qgis-user@lists.osgeo.org
>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>> --
>> Alexandre Neto
>> -
>> @AlexNetoGeo
>> http://sigsemgrilhetas.wordpress.com
>> http://gisunchained.wordpress.com
>
>
> ___
> Qgis-user mailing list
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Re: [Qgis-user] Why QGIS change the SRS?

[Rafa García Castillo]

  Thanks Alexandre for answering. Yes, those projections are quite similar,
but one is in UTM coordinates and the other is TM. I can imagine that the
use of both projections is the same in most of the cases, but makes me
wonder why QGIS does this change, because they have different EPSG code.

  Thanks again.

  Rafa

El 16 feb. 2017 12:45 p. m., "Alexandre Neto" 
escribió:

> Seems that those two projections are equal:
>
> http://spatialreference.org/ref/epsg/etrs89-utm-zone-30n/html/
>
> http://spatialreference.org/ref/epsg/etrs89-etrs-tm30/html/
>
> If you want to force EPSG:25830 into that layer, use the Vector >
> Management tools > Define Projection
>
>
>
> Rafa García Castillo  escreveu no dia quinta,
> 16/02/2017 às 11:11:
>
>>   Hello everybody,
>>
>>   Just one question: I am using QGIS v2.18. I start a project using
>> EPSG:25830. When I load a SHP layer into QGIS, then QGIS change the SRS of
>> the project "on the fly" to EPSG:3042, even when the PRJ file of the SHP
>> layer shows that the SHP is in EPSG:25830. Why?
>>
>>   Thanks in advance
>>
>>   Rafa
>> ___
>> Qgis-user mailing list
>> Qgis-user@lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
> --
> Alexandre Neto
> -
> @AlexNetoGeo
> http://sigsemgrilhetas.wordpress.com
> http://gisunchained.wordpress.com
>
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Re: [Qgis-user] Why QGIS change the SRS?

[Alexandre Neto]

Seems that those two projections are equal:

http://spatialreference.org/ref/epsg/etrs89-utm-zone-30n/html/

http://spatialreference.org/ref/epsg/etrs89-etrs-tm30/html/

If you want to force EPSG:25830 into that layer, use the Vector >
Management tools > Define Projection



Rafa García Castillo  escreveu no dia quinta, 16/02/2017
às 11:11:

>   Hello everybody,
>
>   Just one question: I am using QGIS v2.18. I start a project using
> EPSG:25830. When I load a SHP layer into QGIS, then QGIS change the SRS of
> the project "on the fly" to EPSG:3042, even when the PRJ file of the SHP
> layer shows that the SHP is in EPSG:25830. Why?
>
>   Thanks in advance
>
>   Rafa
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

-- 
Alexandre Neto
-
@AlexNetoGeo
http://sigsemgrilhetas.wordpress.com
http://gisunchained.wordpress.com
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[Qgis-user] Why QGIS change the SRS?

[Rafa García Castillo]

  Hello everybody,

  Just one question: I am using QGIS v2.18. I start a project using
EPSG:25830. When I load a SHP layer into QGIS, then QGIS change the SRS of
the project "on the fly" to EPSG:3042, even when the PRJ file of the SHP
layer shows that the SHP is in EPSG:25830. Why?

  Thanks in advance

  Rafa
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