[Qgis-user] Exporting Raster layer to text file

[Matt Boyd]

David,
have you tried to transform the data to the X/Y projection as a separate
process either before or after changing the format? I'm having issues
getting QGIS installed here so I can't run through the process and tell you
how.

matt

On Mon, Sep 18, 2017 at 11:58 AM, David Reid <davidreid6363 at gmail.com>
wrote:

> Thanks Matt + other respondents to my question.
>
>
>
> I should have been more specific  -  The raster image/data I am trying to
> export is a DEM which I would like to transfer to a 3D modelling system.
>
>
>
> Using the raster/conversion/translate menu I have managed to get most of
> the way, using the ASCII gridded XYZ format output.  This produces a text
> file with XY coordinates and the elevation Z.
>
>
>
> BUT I would like the X and Y in planar grid coordinates (metres).  I have
> selected a plane grid projection as the “target SRS”  but it still produces
> X and Y as lat/long coordinates.
>
>
>
> Any suggestions about what I am doing wrong?
>
>
>
> Cheers
>
>
>
> David Reid
>
>
>
>
>
>
>
>
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>
> *From:* Matt Boyd [mailto:mattslists at gmail.com]
> *Sent:* Friday, 15 September 2017 3:28 PM
> *To:* David Reid <davidreid6363 at gmail.com>
> *Cc:* qgis-user <qgis-user at lists.osgeo.org>
> *Subject:* Re: [Qgis-user] Exporting Raster layer to text file
>
>
>
> David,
>
> also you may find that even though you select a different format it only
> saves as a tiff. If you look at the box that states the command line
> gdaltranslate is using, the -o flag is the output format. You can check the
> box next to the command line and change that manually if it doesn't change
> to tiff automatically. Think it's a bug. the output format options can be
> googled "-o zmap" works.
>
>
>
> On Fri, Sep 15, 2017 at 5:24 PM, Matt Boyd <mattslists at gmail.com> wrote:
>
> Hi David,
>
> rasters come in a few different flavours.
>
> RGB/greyscale photographic type images such as an aerial photograph or a
> georeferenced scan of a map are one. There's not a lot of point exporting
> those as text.
>
>
>
> There are also Raster images where the RGB / black bands represent a
> frequency or attribute from a satellite or remote sensing instrument, you
> might want to convert those to a different format to use in a different
> package or just select a single band to work on.
>
>
>
> Single band raster such as grids or DEMS are another type of raster.
>
>
>
> The last 2 types above can be saved in alternate formats under the
> "convert format" option in the raster dropdown options somewhere, can't
> remember the exact name.
>
>
>
> I usually do this with grids / single band rasters. the command line
> option is gdaltranslate. "save as" doesn't work the same way it does as
> with vector data.
>
>
>
> I don't have QGIS open at the so I can't recommend a format but I think
> CSV is one of them.
>
>
>
> Good luck
>
> Matt
>
>
>
>
>
> On Wed, Sep 13, 2017 at 3:45 PM, David Reid <davidreid6363 at gmail.com>
> wrote:
>
> Hello qgis users,
>
>
>
> I am very new to qgis and would like information on how to export raster
> data as a text file.
>
>
>
> Cheers
>
>
>
> David Reid
>
>
>
>
>
>
>
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