[NOTE: After I originally wrote this post about handling plateaus, I discovered problems with the method, so I am no longer using it. I revisited the plateau issue in a later post. -SE] ... read more >>

In my previous upslope area post, I showed this graphic of pixel flow around North Pond in Milford, Massachusetts: Notice that pixels in the pond have no arrows. In fact, the... read more >>

In Part 2 of the upslope area series, I showed an M-file, pixelFlow, that could calculate a pixel's flow direction and magnitude according to the D-infinity method of Tarboton. Let's... read more >>

A few weeks ago I promised a series on developing a MATLAB algorithm to compute upslope area. Now I'm ready to begin that project in earnest. First, though, I'd like to comment on the... read more >>

A long time ago, blog reader Brendon asked me if I knew of a way to compute something called upslope area in MATLAB. I responded that I had never heard of that before. Brendan explained that it was... read more >>