[Qgis-developer] Vector edits with different projection

[John C. Tull]

Marco,

I was using base NAD 83 clipped 24k topos from http:// 
keck.library.unr.edu. The base map for this test shapefile is Gold  
Point SW. The shapefile, in nad27, is attached. I made the shapefile  
in 0.8.1, then opened the project in 0.9 to test some more. Of  
course, the bug persists where none of my layers show in 0.9 without  
turning them on and off, but that is another issue.

You are correct that it is handling well in 0.9. I do not have the  
unusual offset, but I do get white boxes drawing over the underlying  
topo when I try to do moves. The question now becomes which of those  
is harder to deal with, but I thank you for the response. I hope this  
helps.

Cheers,
John Tull

On Jul 19, 2007, at 10:05 AM, Marco Hugentobler wrote:

> Hi John,
>
> In version 0.9, the edits are transformed automatically back from map
> coordinates to layer coordinates if reprojection is turned on. In  
> 0.8.1, this
> is not the case.
> If the reprojection back to layer cs in 0.9 does not work for you,  
> it is a bug
> and it would be good if you could provide more details. Which editing
> operations did you do and on which data source? Do you have sample  
> data where
> I can reproduce the problem?
> I tried it here with a CH1903 layer reprojected to WGS84 and the  
> edits I did
> seem to be transformed back to CH1903 properly.
>
> Regards,
> Marco
>
> On Tuesday 17 July 2007 22:07:42 John C. Tull wrote:
>> If I have a utm NAD83 project with a utm NAD27 vector, when I edit
>> the vector, the vector edit tools are offset by the difference in the
>> two projections. In other words, the point that you click on a base
>> map with the tool is not where the vector vertex is placed. This
>> makes precise edits very tricky. Is this a bug or a feature? This
>> happens in 0.8.1 and 0.9-trunk.
>>
>> Thanks,
>> John
>> _______________________________________________
>> Qgis-developer mailing list
>> Qgis-developer at lists.qgis.org
>> http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-developer
>
>
>
> -- 
> Dr. Marco Hugentobler
> Institute of Cartography
> ETH Zurich
> Technical Advisor QGIS Project Steering Committee
> marco.hugentobler at karto.baug.ethz.ch
> _______________________________________________
> Qgis-developer mailing list
> Qgis-developer at lists.qgis.org
> http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-developer
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