![Narew River in Poland on Relative Elevation Model [OC]](https://i.redd.it/8hlgl4a32lsb1.png){kind=link}
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Please tell me more about “Relative Elevation Model”. Are those elevations in the river’s surroundings relative to the river’s water surface height? Or something else?
Lemmy (pun intended) answer my own question here: Yes, it’s relative hight along the river’s centerline: https://opentopography.org/blog/new-package-automates-river-relative-elevation-model-rem-generation