This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
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RiverTools 5.0
rivertools.bsky.social
did:plc:bndtsun2jgovmjmzjc7mlunf
RiverTools 5.0 is a user-friendly web app that includes comprehensive tools for extracting all kinds of information from digital terrain data (DEMs), as well as visualizing, interacting with, and analyzing that information.