[Qgis-user] CRS / reprojection problems

[Matt Boyd]

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/cef31245/attachment.html>