Dear all,
I'm using gdalwarp to reproject a wgs84 srtm (3 arcseconds) tile to a
projected utm zone. I do not set "-tr" or "-ts" options, hence the final
output resolution is estimated by the gdalwarp module itself.

For my tile I obtained an output resolution of 81.19 meters and I'm
wondering if one could explain which is the rationale behind this value.

Many thanks

Ivan


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