[Qgis-user] Problem with interpolation plugin

[Giovanni Manghi]

Hi Zara,

I tested your dataset, saving it to epsg 3763 and get the issue when
doing the TIN interpolation (I will file a ticket). IDW works fine here,
as also any method in the "raster -> analysis -> grid" tool.

cheers


-- Giovanni --




On Fri, 2012-03-23 at 16:01 +0000, Zara Teixeira wrote:
> It is in fact the 20790, and I had tried that too.
> But the problem remains if I convert it to another CRS.
> 
> 
> thanks anyway.
> 
> On Fri, Mar 23, 2012 at 3:48 PM, ALT SHN <i.geografica at alt-shn.org>
> wrote:
>         It seems to be a CRS problem.
>         
>         First you have to be sure what EPSG code is equivalent to ESRI
>         102164 (I think it's the 20790) 
>         
>          Before converting  to 3763, make sure the layer assumes the
>         correct EPSG code as CRS. Go to Properties --> General and
>         then declare 20790 as the correct EPSG, Then Save it as 3763.
>         
>         Hope it helps
>         
>         2012/3/23 Zara Teixeira <zarafani at gmail.com>
>                 Hi,
>                 
>                 
>                 I have this shapefile with points in ESRI: 102164
>                 Because all my work is in EPSG 3763, I changed the CRS
>                 to this one.
>                 The problem is that everytime I try to create a TIN
>                 with the interpolation plugin, both QGIS 1.9.9 and
>                 1.7.4 crash. I have them installed in Windows 7.
>                 This doesn't happen with the original shapefile, or
>                 even if I use the IDW algorithm, but happens if I
>                 transform the shapefile to any other CRS.
>                 
>                 
>                 P.S. I would prefer to change the CRS before I
>                 interpolate.
>                 
>                 
>                 Any idea why?
>                 Thanks in advance.
>                 
>                 
>                 
>                 
>                 Zara
>                 
>                 
>                 
>                 
>                 
>                 
>                 
>                 
>                 
>                 
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