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List: qgis-user
Subject: Re: [Qgis-user] Raster .asc and .nc wrong projection
From: John Layt <j.layt () lparchaeology ! com>
Date: 2022-01-28 10:20:16
Message-ID: CADRRrgZ1Dw_t7jp_ZiOkgyrtuZvXCYAx7YQoPDjin5zD=wnnsw () mail ! gmail ! com
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On Thu, 27 Jan 2022 at 21:38, Eugenio Trumpy <frippe12573@hotmail.com>
wrote:
> However, it seems that starting with a new project and importing raster as
> .asc or .nc the things work fine,
> then it happens that the origin and the scale of the raster change wrongly
> without any reason.
> In my case, origin changes beside the scale which seems to be coupled.
> Anyone has experienced this issue?
>
> I have the error message:
> Approximate used transformation from ESRI:104000 to EPSG:4326
> but I don't think it is the problem.
>
> The same dataset in the same qgis version 3.22.3 on ubuntu (installed from
> package deb)
> has not the same problem.
>
Hi Eugenio,
There are 2 bugs in 3.22.3 that I think you've hit. One is rasters are
displayed wrong on Mac Retina screens, and the other is with CRS
transforms. Both are fixed in 3.22.4 due next month, but in the meantime I
suggest you use 3.22.2 instead to fix the raster problem (
https://qgis.org/downloads/macos/pr/qgis_pr_final-3_22_2_20211217_134828.dmg
).
If the approximate transform error appeared only when creating the new
project and setting your CRS, then it's not a problem. If it appears when
opening an old project, then you need to either set the correct transform
manually, or use 3.16 where this isn't an issue.
Cheers!
John.
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<div dir="ltr"><div dir="ltr">On Thu, 27 Jan 2022 at 21:38, Eugenio Trumpy <<a \
href="mailto:frippe12573@hotmail.com">frippe12573@hotmail.com</a>> \
wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" \
style="margin:0px 0px 0px 0.8ex;border-left:1px solid \
rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><span \
style="font-size:12pt">However, it seems that starting with a new project and \
importing raster as .asc or .nc the things work fine,</span><br></div> <div \
style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> \
then it happens that the origin and the scale of the raster change wrongly without \
any reason.</div> <div \
style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> In \
my case, origin changes beside the scale which seems to be coupled.</div> <div \
style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"> \
Anyone has experienced this issue?<br> <div \
style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)"><br> </div>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">I have the \
error message:</div> <div \
style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">Approximate used \
transformation from ESRI:104000 to EPSG:4326</div> <div \
style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">but I don't \
think it is the problem.</div> <div \
style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)"><br> </div>
<div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">The same \
dataset in the same qgis version 3.22.3 on ubuntu (installed from package deb) \
</div> <div style="margin:0px;font-size:12pt;background-color:rgb(255,255,255)">has \
not the same problem.</div></div></div></blockquote><div><br></div><div>Hi \
Eugenio,</div><div><br></div><div>There are 2 bugs in 3.22.3 that I think you've \
hit. One is rasters are displayed wrong on Mac Retina screens, and the other is with \
CRS transforms. Both are fixed in 3.22.4 due next month, but in the meantime I \
suggest you use 3.22.2 instead to fix the raster problem (<a \
href="https://qgis.org/downloads/macos/pr/qgis_pr_final-3_22_2_20211217_134828.dmg">https://qgis.org/downloads/macos/pr/qgis_pr_final-3_22_2_20211217_134828.dmg</a>). \
</div><div><br></div><div>If the approximate transform error appeared only when \
creating the new project and setting your CRS, then it's not a problem. If it \
appears when opening an old project, then you need to either set the correct \
transform manually, or use 3.16 where this isn't an \
issue.</div><div><br></div><div>Cheers!</div><div><br></div><div>John.</div><div><br></div></div></div>
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