[gdal-dev] [EXTERNAL] Convert VRT+JPEG with gdalwarp

[Doug Newcomb]

Kalev,
Just set the output file format to -f  JPEG format   ( .jpg) or  -f
JP2OpenJPEG (.jp2)

The JPEG format will be lossey by default.  Is that what you want?
See:

https://medium.com/planet-stories/a-gentle-introduction-to-gdal-part-1-a3253eb96082

https://medium.com/planet-stories/a-gentle-introduction-to-gdal-part-2-map-projections-gdalwarp-e05173bd710a

Doug

On Thu, Jun 21, 2018 at 10:00 AM kalevj <kalev.julge at reach-u.com> wrote:

> Hello,
>
> I used gdalwarp to transform a VRT+JPEG pair from one EPSG projection to
> another. Everything worked well. This conversion changed the VRT file so
> that reprojection takes place when the images are loaded. However, I would
> need to reproject the JPEG so that there would not be a need to reproject
> every time the images are loaded. Is it possible somehow?
>
> I used the command:
> "gdalwarp -s_srs EPSG:2006 -t_srs EPSG:3857 -of VRT -r near old.vrt
> new.vrt"
>
> Thanks!
>
> Kalev
>
>
>
> --
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-- 
Doug Newcomb
USFWS
551F Pylon Dr
Raleigh, NC
919-856-4520 ext. 14 doug_newcomb at fws.gov
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