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8

While Jacub is correct that a stream ordering technique is your best bet for being able to represent stream magnitude or discharge, since the position in the network is a surrogate for these two stream characteristics, I would argue that you want to avoid using Horton-Strahler stream order for this purpose. It is seriously deficient in these applications, ...


9

You can classify the streams using, among others, the Strahler Stream Ordering method. In the Strahler method, all links without any tributaries are assigned an order of 1 and are referred to as first order. The stream order increases when streams of the same order intersect. Therefore, the intersection of two first-order links will create a ...


0

Suggest you try building a virtual raster from the DEM TIFFs: Raster -> Miscellaneous -> Build Virtual Raster (Catalog). It seems to work with your sample data. Sorry, I just had to put some hillshade on the result. N.


2

It seems that there are two things going on here. First, your tiles are not seamless, in that in the areas of overlap at the edges of the tiles, the elevations are not identical. I can confirm this as I digitized several points along the overlapping area and extracted the elevations in both raster DEMs and found this: In the case of the two tiles that you ...


0

As a remark, topological problem are better solved with vector, but in this case there is a raster-based solution. For instance you convert to lines 'raster to lines), then you use "extend line" with a tolerance use "expand" of one pixel to create a buffer around all your lines. Then you can do your region group and remove small parts (e.g. reclassify with ...



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