Just an update, I have found out how to do this numerically. Will consider a PR for gdaldem if I can make it work at some point.
Thanks, Mike On Tue, Jul 9, 2024 at 7:31 AM Michael Sumner <mdsum...@gmail.com> wrote: > Is it possible to "layer" one image over another, the first at full > transparency and the second with partial transparency? > > I'm thinking of combining a hillshade and a (partially) transparent > color-relief image, a visual enhancement technique. (I know how to do > this downstream in R and Python or similar, I'd like to stay in C++'s warm > embrace. ) > > I can go and find out what "over plot" means when it comes to colour > imagery, just wondering if there's anything in-built already. This might > be a nice additional mode to gdaldem (and is what I thought "color-relief" > meant, at first). > > Cheers, Mike > > > -- > Michael Sumner > Research Software Engineer > Australian Antarctic Division > Hobart, Australia > e-mail: mdsum...@gmail.com > -- Michael Sumner Research Software Engineer Australian Antarctic Division Hobart, Australia e-mail: mdsum...@gmail.com
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