[Qgis-user] postgis and custom CRS

[Duarte Carreira]

Oops... it seems "it should" and it does indeed! Great. Sorry for the confusion.

So qgis gets the CRS id from the layer, and the definition from its own crs db, if the id is not found, then it's unknown, right?

Duarte

-----Mensagem original-----
De: Ramon Andinach [mailto:custard at westnet.com.au]
Enviada: sexta-feira, 8 de Abril de 2011 12:57
Para: qgis-user
Assunto: Re: [Qgis-user] postgis and custom CRS

It probably should.

The default behaviour in QGIS is to assume.
I've set mine so that if it doesn't know, it asks (have a look under settings).

-ramon.

On 08/04/2011, at 16:41 , Duarte Carreira wrote:

> But shouldn't QGIS identify the CRS correctly? Or at least say it is unknown? Stating the wrong CRS will misguide users.
>
> Duarte
>
> De: pcreso at pcreso.com [mailto:pcreso at pcreso.com]
> Enviada: quinta-feira, 7 de Abril de 2011 20:34
> Para: Duarte Carreira
> Cc: qgis-user at lists.osgeo.org
> Assunto: Re: [Qgis-user] postgis and custom CRS
>
> You'll need to define the coordinate system in QGIS as well as PostGIS, & probably tel QGIS which projection to use fro the project & the layer.
>
> Brent Wood
>
> --- On Fri, 4/8/11, Duarte Carreira <DCarreira at edia.pt> wrote:
>
> From: Duarte Carreira <DCarreira at edia.pt>
> Subject: [Qgis-user] postgis and custom CRS
> To: "qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
> Date: Friday, April 8, 2011, 5:15 AM
>
> Hi.
>
>
>
> I'm seeing this behavior and would like to confirm it.
>
>
>
> When I add a PG layer that has a custom CRS, QGIS says it is WGS84 (in the metadata tab in properties).
>
>
>
> In PG I have the custom CRS defined like this:
>
>
>
> Srid: 9102160
>
> Auth_name: ESRI
>
> Auth_srid: 102160
>
> Srtext: "PROJCS["Datum_73_Hayford_Gauss_IGeoE",GEOGCS["GCS_Datum_73",DATUM["Datum_73",SPHEROID["International_1924",6378388,297]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",200180.598],PARAMETER["False_Northing",299913.01],PARAMETER["Central_Meridian",-8.131906111111112],PARAMETER["Scale_Factor",1],PARAMETER["Latitude_Of_Origin",39.66666666666666],UNIT["Meter",1],AUTHORITY["EPSG","102160"]]"
>
> Proj4text: "+proj=tmerc +lat_0=39.66666666666666 +lon_0=-8.131906111111112 +k=1 +x_0=200180.598 +y_0=299913.01 +ellps=intl +units=m +towgs84=-288.885,-91.744,126.244,-1.691,0.410,-0.211,-4.598 +no_defs"
>
>
>
> Can someone confirm?
>
>
>
> Thanks,
>
> Duarte
>
>
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