[Qgis-user] Why QGIS change the SRS?

Goyo goyodiaz at gmail.com
Mon Feb 20 12:14:31 PST 2017


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 <ragaca at gmail.com>:
>   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" <senhor.neto at gmail.com>
> 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 <ragaca at gmail.com> 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
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>>
>> --
>> Alexandre Neto
>> ---------------------
>> @AlexNetoGeo
>> http://sigsemgrilhetas.wordpress.com
>> http://gisunchained.wordpress.com
>
>
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