[Qgis-user] digitizing

[Patrick Dunford]

There are some times when the libraries can run out of memory if a 
raster is very large, so you can have something that something like a 
graphics editor e.g Gimp can open OK but Qgis coujld have trouble 
opening it.

On 17/06/22 14:22, Firstname Lastname wrote:
> I think that there is something wrong with the Tif file I was using.  
> I had the same problem with a couple of files but I went back to the 
> source file and redid the referencing and it is ok.
>
> On Thu, Jun 16, 2022 at 7:46 PM Patrick Dunford via Qgis-user 
> <qgis-user at lists.osgeo.org> wrote:
>
>     This is a generic answer, as more information would be needed to
>     determine exactly the situation you are experiencing.
>
>     If you zoom to the layer, is it then displayed in the same place
>     as the rest of your map?
>
>     My recollection of the georeferencer is it produces a world file
>     to go with the layer. This should have the correct top-left
>     coordinates and pixel resolution in it. Is there also an XML file
>     that specifies the CRS?
>
>     Look at the layer name where it is loaded in the GIS and see if
>     there is a question mark displayed next to its name, that
>     indicates QGIS doesn't have enough information to position the
>     layer, such as the information that is stored in sidecar files.
>
>     It is also possible if the file is very large that it will be slow
>     to display. Also have a look at the error log at the bottom of the
>     screen to see if any error messages are displayed.
>
>     On 17/06/22 04:23, Firstname Lastname via Qgis-user wrote:
>>     i have been successfully using the georeferencer for some time. 
>>     i referenced several maps and they succesfully georeferenced
>>     and  displayed for me.
>>     Then, i was digitizing and i ran the georeference tool and for
>>     some reason, the new referenced maps do not display.  i have
>>     exited and tried to georef in a new project and made sure that i
>>     have the same CRS for the basemap and the georef tool but when i
>>     run the referencer, the layer appear but the map will not
>>     display.  i have tried restarting, clearing the georef tool and
>>     running again but i get the same result.   Does anyone know what
>>     i am doing wrong and why my referenced maps will not display?
>>
>>     -- 
>>     Byron Veilleux, MSc. P.Geo
>>     Conjugate Geologic Services Limited
>>     Calgary, Alberta Canada
>>     byron at conjugategeo.com
>>     Cell:4037108414
>>
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> -- 
> Byron Veilleux, MSc. P.Geo
> Conjugate Geologic Services Limited
> Calgary, Alberta Canada
> byron at conjugategeo.com
> Cell:4037108414
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