[Qgis-user] problem reprojecting some shapefiles

[Carlos Cerdán]

It's strange, I have not problem to do it: reproject a shape file from a
kml, even to reproject a kml and directly convert it to shape file. (Right
click --> Save as...) - QGIS 2.0.1 - Ubuntu 12.04.... I think you must not
use "Define projection".

Carlos


2014/1/21 Giacomo Fontanelli <giacomofontanelli76 at gmail.com>

> Thank you very much, I tried you suggestion, but it doesn't work. I think
> is because of the origin of the shapefile, coming from a kml. Since is not
> the first time that I notice this problem, I realized that it is not
> possible to reproject a shapefile made from a kml. Am I wrong? Thank you
>
>
> On Tue, Jan 21, 2014 at 1:04 PM, Simon Cropper <
> simoncropper at fossworkflowguides.com> wrote:
>
>> On 21/01/14 22:44, Giacomo Fontanelli wrote:
>>
>>> dear community
>>>
>>> I'm gonna report a problem that I observed frequently. I have polygon
>>> shapefile, downloaded from the net, representing the path of a
>>> satellite. I think this shapefile derive from a .kml, but I'm not sure.
>>> This layer is WGS84 EPSG:4326.
>>>
>>> I have also a layer in UTM 32N (EPSG:32632).
>>>
>>> If I work with the on the fly projection I can see both the layers
>>> correctly reprojected and positioned in EPSG 32632 (this must be the
>>> reference system of my project), but once I deflag the on fly projection
>>> and I try to reproject the WGS84 layer (Vector>Define projection) in UTM
>>> 32 N, the polygons are absolutely not overlayed.
>>>
>>> If I start again the on the fly projectio I don't get any overlay, the
>>> only way to reach a good positioning is to reproject again the first
>>> layer in the native reference system (WGS84) and using the on the fly
>>> reprojection.
>>>
>>> My impression is thar QGIS doesn't correctly reproject the shapefiles
>>> coming from .kml, am I wrong?
>>>
>>> Thank you very much
>>>
>>>
>>>
>>> _______________________________________________
>>> Qgis-user mailing list
>>> Qgis-user at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>>>
>>>
>> Hi Giacomo,
>>
>> It may be possible that  your shapefile does not have a spatial index
>> (depends on tool used to convert from kml).
>>
>> Try opening your original file in a new project projected in WGS84
>> EPSG:4326, then reproject it to EPSG 32632 giving it a new name.
>>
>> Open your original project in UTM 32N (EPSG:32632) and open the newly
>> created satellite file.
>>
>> Does this work?
>>
>> --
>> Cheers Simon
>>
>>    Simon Cropper - Open Content Creator
>>
>>    Free and Open Source Software Workflow Guides
>>    ------------------------------------------------------------
>>    Introduction               http://www.fossworkflowguides.com
>>    GIS Packages           http://www.fossworkflowguides.com/gis
>>    bash / Python    http://www.fossworkflowguides.com/scripting
>> _______________________________________________
>> Qgis-user mailing list
>> Qgis-user at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20140121/a1f63e02/attachment.html>