Wikipedia:Graphics Lab/Map workshop/Archive/Mar 2024

This is an archive of past discussions on Wikipedia:Graphics Lab, for the period 2023.
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Archives of 2023:

January, February, March, April, May, June, July, August, September, October, November,

December

Stitching of satellite images

Not a direct map request, rather looking for some assistance. From USGS EarthExplorer, I downloaded some early satellite images (the low-resolution preview version, high resolution is not available for free). These image are not georeferenced and show only very small areas, so for georeferenciation, the images need to be stitched first. Have not done that before, so the question, is there free software for that purpose?--Antemister (talk) 19:56, 29 February 2024 (UTC)

Antemister, what product are you using from the EarthExplorer? I didn't even know there were things you could purchase from the site-- are you sure it isn't a free download? A georeferenced raster could very easily be merged in QGIS or similar. – Isochrone (talk) 21:00, 29 February 2024 (UTC)

It is about the "declassified data", it contain images from the early US reconnaissance satellites in the 1968s. The images are scanned, but only in low resolution and not properly georeferenced. What I want to do is drawing the shorelines of Aral Sea in 1968, for that I have to download a few dozens of these narrow stripes and then stitch them before georefencing.--Antemister (talk) 21:28, 29 February 2024 (UTC)