[Qgis-user] CRS / reprojection problems

[Nicolas Cadieux]

Hi,
Right clicking on the layer in the layer panel and changing the projection to the correct one should then fix the problem.  Tell me if it’s still a problem and I will also look at the data.
Nicolas

> Le 22 mai 2019 à 03:34, <b.j.kobben at utwente.nl> <b.j.kobben at utwente.nl> a écrit :
> 
> Sorry to have to disagree with you, but there is something wrong with your data. If I load the "lineations_GDA94" it claims to be a projected data, and the units are clearly meters (numbers like -42854769,3100060 in the coordinate readout). But if you check, you'd find that  QGIS thinks the units are degrees:
>  
> <image001.png>
>  
> Treating the meter cooridnates as degrees works as long as no reprojection is needed, but will mess up things when combining it with other data...
>  
>  
> --
> Barend Köbben
>  
>  
> On 22/05/2019, 05:54, "Qgis-user on behalf of Matt Boyd" <qgis-user-bounces at lists.osgeo.org on behalf of mattslists at gmail.com> wrote:
>  
> Hi Nicolas and Alexandre,
> I'm pretty sure that I've done as much as I can to make sure I haven't screwed up the projections. I used to make those mistakes years ago when I was first learning, lately the mistakes I've made are because I haven't been paying attention... I'm pretty sure I'm paying attention this time.
>  
> This is a link to some data and a qgis file I'm using as an example
> https://unimelbcloud-my.sharepoint.com/:f:/g/personal/boydmc_student_unimelb_edu_au/EuUzfUvxA6NGmZOuYo8_fmkB0AvLldzBmXwq68mdwZvmcw?e=Ake4Qi
>  
> lineations_MGA54_projected is the shapefile with the correctly projected information layer. - Known good data
>  
> If I change to a geogrpahic / unprojected coordinate system, for example GDA94, this layer is not displayed and the canvas is blank.
>  
> If I export the lineations_MGA54_projected data to a new file as unprojected GDA94 option, the re-projected data is wrong.
>  
> Thanks for your help
>  
> Matt
>  
>  
>  
>  
>  
>  
> On Tue, May 21, 2019 at 11:37 PM Nicolas Cadieux <nicolas.cadieux at archeotec.ca> wrote:
> Hi,
> 
> 99 % of the time, the data is the problem because it’s in the wrong crs.  Right click on the problem layer in the layer panel and change the layer crs to what is should be.  Use a google or other base map from quickmap plugin.  That should permit you to find the correct CRS.
> 
> Sometimes, crs will have problems reprojecting across some latitudes or longitude (like projections make for the poles).  In that case, reprojecting the data using the “save as” option will solve the problem.
> 
> Nicolas
> 
> > Le 20 mai 2019 à 21:53, Matt Boyd <mattslists at gmail.com> a écrit :
> > 
> > Hi QGISers,
> > I'm having an issue with reprojecting things in QGIS.
> > Installer OSGEO64W
> > Latest version and LTS both have same issue.
> > 
> > Issue:
> > reprojection just isn't working. If I load a data set with decimal degrees and another with a projected coordinate system the data (points / lines / polygons) will only display if the basemap is in the same projection system.
> > 
> > This is happening across 2 PCs, (windows10) and the LTS and latest versions of QGIS. Has anyone got some troubleshooting tips?
> > 
> > Thanks
> > Matt
> > _______________________________________________
> > Qgis-user mailing list
> > Qgis-user at lists.osgeo.org
> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20190522/c77a8da5/attachment.html>