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I want to develop a web portal that will show the images dynamically produced by qgis . but qgis provided tiff images are too big in size and it is not possible to show it on website using image viewers. That's why I have decided to convert those tiff images into jpg/jpeg to reduce in size as well as browser friendly so that I can show those images on my website easily. But I don't know how to convert tiff images into jpg/jpeg using gdal commands.

Please help me in this regard. thanks in advance.

Enamul

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two questions: 1) do you want only to change(convert) the image type from tiff to jpg or do you also want to resize? 2)which operating system do you use? – Kurt May 26 '12 at 15:22
I also want to resize and I'm using ubuntu – Enamul Haque May 26 '12 at 17:13

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up vote 5 down vote

try this with gdal:

gdal_translate -of JPEG -scale -co worldfile=yes input.tiff output.jpg

it also create worldfile too...

i hope it helps you...

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thanks to those who commented on my post. Aragon your solution worked for me – Enamul Haque May 26 '12 at 17:22
one more thing how can I do it dynamically so that I can show the image on the website – Enamul Haque May 26 '12 at 17:42
up vote 3 down vote

Hei!

Choose Raster menu - Conversion - Translate (Convert format). Then choose *Input file* for the image You want to convert. Under the *Output file* You can choose the format You need. There is .jpg too (with some 20+ file types).

I got 40MB large .tiff file, after conversion its only 1,6 MB as .jpg.

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